Replace likes with generic building-user attribs

app/package-lock.json

@@ -2031,6 +2031,12 @@
       "integrity": "sha512-//oorEZjL6sbPcKUaCdIGlIUeH26mgzimjBB77G6XRgnDl/L5wOnpyBGRe/Mmf5CVW3PwEBE1NjiMZ/ssFh4wA==",
       "dev": true
     },
+    "@types/pg-format": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/@types/pg-format/-/pg-format-1.0.2.tgz",
+      "integrity": "sha512-D3MEO6u3BObw3G4Xewjdx05MF5v/fiog78CedtrXe8BhONM8GvUz2dPfLWtI0BPRBoRd6anPHXe+sbrPReZouQ==",
+      "dev": true
+    },
     "@types/prettier": {
       "version": "2.2.3",
       "resolved": "https://registry.npmjs.org/@types/prettier/-/prettier-2.2.3.tgz",
@@ -11607,9 +11613,9 @@
       }
     },
     "node-abi": {
-      "version": "2.21.0",
+      "version": "2.30.0",
-      "resolved": "https://registry.npmjs.org/node-abi/-/node-abi-2.21.0.tgz",
+      "resolved": "https://registry.npmjs.org/node-abi/-/node-abi-2.30.0.tgz",
-      "integrity": "sha512-smhrivuPqEM3H5LmnY3KU6HfYv0u4QklgAxfFyRNujKUzbUcYZ+Jc2EhukB9SRcD2VpqhxM7n/MIcp1Ua1/JMg==",
+      "integrity": "sha512-g6bZh3YCKQRdwuO/tSZZYJAw622SjsRfJ2X0Iy4sSOHZ34/sPPdVBn8fev2tj7njzLwuqPw9uMtGsGkO5kIQvg==",
       "requires": {
         "semver": "^5.4.1"
       }
@@ -11695,11 +11701,6 @@
       "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-6.4.11.tgz",
       "integrity": "sha512-BVZBDi+aJV4O38rxsUh164Dk1NCqgh6Cm0rQSb9SK/DHGll/DrCMnycVDD7msJgZCnmVa8ASo8EZzR7jsgTukQ=="
     },
-    "noop-logger": {
-      "version": "0.1.1",
-      "resolved": "https://registry.npmjs.org/noop-logger/-/noop-logger-0.1.1.tgz",
-      "integrity": "sha1-lKKxYzxPExdVMAfYlm/Q6EG2pMI="
-    },
     "nopt": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/nopt/-/nopt-5.0.0.tgz",
@@ -12561,6 +12562,11 @@
       "resolved": "https://registry.npmjs.org/pg-connection-string/-/pg-connection-string-0.1.3.tgz",
       "integrity": "sha1-2hhHsglA5C7hSSvq9l1J2RskXfc="
     },
+    "pg-format": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/pg-format/-/pg-format-1.0.4.tgz",
+      "integrity": "sha1-J3NCNsKtP05QZJFaWTNOIAQKgo4="
+    },
     "pg-int8": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/pg-int8/-/pg-int8-1.0.1.tgz",
@@ -14222,9 +14228,9 @@
       }
     },
     "prebuild-install": {
-      "version": "6.1.1",
+      "version": "6.1.3",
-      "resolved": "https://registry.npmjs.org/prebuild-install/-/prebuild-install-6.1.1.tgz",
+      "resolved": "https://registry.npmjs.org/prebuild-install/-/prebuild-install-6.1.3.tgz",
-      "integrity": "sha512-M+cKwofFlHa5VpTWub7GLg5RLcunYIcLqtY5pKcls/u7xaAb8FrXZ520qY8rkpYy5xw90tYCyMO0MP5ggzR3Sw==",
+      "integrity": "sha512-iqqSR84tNYQUQHRXalSKdIaM8Ov1QxOVuBNWI7+BzZWv6Ih9k75wOnH1rGQ9WWTaaLkTpxWKIciOF0KyfM74+Q==",
       "requires": {
         "detect-libc": "^1.0.3",
         "expand-template": "^2.0.3",
@@ -14233,7 +14239,6 @@
         "mkdirp-classic": "^0.5.3",
         "napi-build-utils": "^1.0.1",
         "node-abi": "^2.21.0",
-        "noop-logger": "^0.1.1",
         "npmlog": "^4.0.1",
         "pump": "^3.0.0",
         "rc": "^1.2.7",
@@ -15035,13 +15040,6 @@
         "ini": "~1.3.0",
         "minimist": "^1.2.0",
         "strip-json-comments": "~2.0.1"
-      },
-      "dependencies": {
-        "minimist": {
-          "version": "1.2.5",
-          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
-          "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw=="
-        }
       }
     },
     "react": {
@@ -15970,14 +15968,14 @@
       "dev": true
     },
     "sharp": {
-      "version": "0.28.1",
+      "version": "0.28.3",
-      "resolved": "https://registry.npmjs.org/sharp/-/sharp-0.28.1.tgz",
+      "resolved": "https://registry.npmjs.org/sharp/-/sharp-0.28.3.tgz",
-      "integrity": "sha512-4mCGMEN4ntaVuFGwHx7FvkJQkIgbI+S+F9a3bI7ugdvKjPr4sF7/ibvlRKhJyzhoQi+ODM+XYY1de8xs7MHbfA==",
+      "integrity": "sha512-21GEP45Rmr7q2qcmdnjDkNP04Ooh5v0laGS5FDpojOO84D1DJwUijLiSq8XNNM6e8aGXYtoYRh3sVNdm8NodMA==",
       "requires": {
         "color": "^3.1.3",
         "detect-libc": "^1.0.3",
-        "node-addon-api": "^3.1.0",
+        "node-addon-api": "^3.2.0",
-        "prebuild-install": "^6.1.1",
+        "prebuild-install": "^6.1.2",
         "semver": "^7.3.5",
         "simple-get": "^3.1.0",
         "tar-fs": "^2.1.1",
@@ -15985,23 +15983,28 @@
       },
       "dependencies": {
         "color": {
-          "version": "3.1.3",
+          "version": "3.2.1",
-          "resolved": "https://registry.npmjs.org/color/-/color-3.1.3.tgz",
+          "resolved": "https://registry.npmjs.org/color/-/color-3.2.1.tgz",
-          "integrity": "sha512-xgXAcTHa2HeFCGLE9Xs/R82hujGtu9Jd9x4NW3T34+OMs7VoPsjwzRczKHvTAHeJwWFwX5j15+MgAppE8ztObQ==",
+          "integrity": "sha512-aBl7dZI9ENN6fUGC7mWpMTPNHmWUSNan9tuWN6ahh5ZLNk9baLJOnSMlrQkHcrfFgz2/RigjUVAjdx36VcemKA==",
           "requires": {
-            "color-convert": "^1.9.1",
+            "color-convert": "^1.9.3",
-            "color-string": "^1.5.4"
+            "color-string": "^1.6.0"
           }
         },
         "color-string": {
-          "version": "1.5.5",
+          "version": "1.6.0",
-          "resolved": "https://registry.npmjs.org/color-string/-/color-string-1.5.5.tgz",
+          "resolved": "https://registry.npmjs.org/color-string/-/color-string-1.6.0.tgz",
-          "integrity": "sha512-jgIoum0OfQfq9Whcfc2z/VhCNcmQjWbey6qBX0vqt7YICflUmBCh9E9CiQD5GSJ+Uehixm3NUwHVhqUAWRivZg==",
+          "integrity": "sha512-c/hGS+kRWJutUBEngKKmk4iH3sD59MBkoxVapS/0wgpCz2u7XsNloxknyvBhzwEs1IbV36D9PwqLPJ2DTu3vMA==",
           "requires": {
             "color-name": "^1.0.0",
             "simple-swizzle": "^0.2.2"
           }
         },
+        "node-addon-api": {
+          "version": "3.2.1",
+          "resolved": "https://registry.npmjs.org/node-addon-api/-/node-addon-api-3.2.1.tgz",
+          "integrity": "sha512-mmcei9JghVNDYydghQmeDX8KoAm0FAiYyIcUt/N4nhyAipB17pllZQDOJD2fotxABnt4Mdz+dKTO7eftLg4d0A=="
+        },
         "semver": {
           "version": "7.3.5",
           "resolved": "https://registry.npmjs.org/semver/-/semver-7.3.5.tgz",

app/package.json

@@ -32,6 +32,7 @@
     "mapnik": "^4.5.8",
     "node-fs": "^0.1.7",
     "nodemailer": "^6.4.11",
+    "pg-format": "^1.0.4",
     "pg-promise": "^8.7.5",
     "query-string": "^6.13.1",
     "react": "^17.0.2",
@@ -39,7 +40,7 @@
     "react-leaflet": "^3.1.0",
     "react-router-dom": "^5.2.0",
     "serialize-javascript": "^5.0.1",
-    "sharp": "^0.28.1",
+    "sharp": "^0.28.3",
     "use-throttle": "0.0.3"
   },
   "devDependencies": {
@@ -53,6 +54,7 @@
     "@types/mapbox__sphericalmercator": "^1.1.3",
     "@types/node": "^12.12.53",
     "@types/nodemailer": "^6.4.0",
+    "@types/pg-format": "^1.0.2",
     "@types/react": "^17.0.3",
     "@types/react-dom": "^17.0.3",
     "@types/react-router-dom": "^4.3.5",

app/src/api/config/aggregationsConfig.ts

@@ -0,0 +1,22 @@
+import { buildingAttributesConfig, buildingUserAttributesConfig } from '../config/dataFields';
+
+export type AggregationMethod = 'countTrue';
+
+export interface AggregationConfig {
+    aggregateFieldName: keyof typeof buildingAttributesConfig;
+    aggregationMethod: AggregationMethod;
+};
+
+/**
+ * Configuration for building-user attribute aggregations.
+ * The config defines how attributes that are collected per building, per user are aggregated into per building attributes.
+ * An example is the building like mechanism: 
+ */
+export const aggregationsConfig: { [key in keyof typeof buildingUserAttributesConfig]?: AggregationConfig[]}  = {
+    community_like: [
+        {
+            aggregateFieldName: 'likes_total',
+            aggregationMethod: 'countTrue'
+        }
+    ]
+};

app/src/api/config/dataFields.ts

@@ -2,6 +2,12 @@ import { valueType } from '../../helpers';
 
 /** Configuration for a single data field */
 export interface DataFieldConfig {
+
+    /**
+     * Default: false
+     */
+    perUser?: boolean;
+
     /**
      * Allow editing the field through the API?
      */
@@ -41,7 +47,10 @@ export interface DataFieldConfig {
     sqlCast?: 'json' | 'jsonb';
 }
 
-export const dataFieldsConfig = valueType<DataFieldConfig>()({ /* eslint-disable @typescript-eslint/camelcase */
+export const buildingAttributesConfig = valueType<DataFieldConfig>()({ /* eslint-disable @typescript-eslint/camelcase */
+    ref_toid: {
+        edit: false
+    },
     ref_osm_id: {
         edit: true,
     },
@@ -268,5 +277,13 @@ export const dataFieldsConfig = valueType<DataFieldConfig>()({ /* eslint-disable
     }
 });
 
-export type Building = { [k in keyof typeof dataFieldsConfig]: any };
+
-export type BuildingUpdate = Partial<Building>;
+export const buildingUserAttributesConfig = valueType<DataFieldConfig>()({
+    community_like: {
+        perUser: true,
+        edit: true,
+        verify: false,
+    },
+});
+
+export const allAttributesConfig = Object.assign({}, buildingAttributesConfig, buildingUserAttributesConfig);

app/src/api/config/fieldSchemaConfig.ts

@@ -1,8 +1,8 @@
 import { JSONSchemaType } from 'ajv';
 import { SomeJSONSchema } from 'ajv/dist/types/json-schema';
-import { dataFieldsConfig } from './dataFields';
+import { allAttributesConfig } from './dataFields';
 
-export const fieldSchemaConfig: { [key in keyof typeof dataFieldsConfig]?: SomeJSONSchema} = { /*eslint-disable @typescript-eslint/camelcase */
+export const fieldSchemaConfig: { [key in keyof typeof allAttributesConfig]?: SomeJSONSchema} = { /*eslint-disable @typescript-eslint/camelcase */
     
     demolished_buildings:  {
         type: 'array',

app/src/api/controllers/buildingController.ts

@@ -2,6 +2,7 @@ import express from 'express';
 
 import { ApiUserError } from '../errors/api';
 import { UserError } from '../errors/general';
+import { parseBooleanExact } from '../../helpers';
 import { parsePositiveIntParam, processParam } from '../parameters';
 import asyncController from '../routes/asyncController';
 import * as buildingService from '../services/building/base';
@@ -39,8 +40,18 @@ const getBuildingsByReference = asyncController(async (req: express.Request, res
 const getBuildingById = asyncController(async (req: express.Request, res: express.Response) => {
     const buildingId = processParam(req.params, 'building_id', parsePositiveIntParam, true);
 
+    const returnUserAttributes = parseBooleanExact(String(req.query.user_attributes));
+
+    let userDataOptions = null;
+    if(returnUserAttributes) {
+        if(!req.session.user_id) {
+            return res.send({ error: 'Must be logged in' });
+        }
+        userDataOptions = { userId: req.session.user_id, userAttributes: true};
+    }
+
     try {
-        const result = await buildingService.getBuildingById(buildingId);
+        const result = await buildingService.getBuildingById(buildingId, { userDataOptions });
         res.send(result);
     } catch(error) {
         console.error(error);
@@ -50,44 +61,43 @@ const getBuildingById = asyncController(async (req: express.Request, res: expres
 
 // POST building attribute updates
 const updateBuildingById = asyncController(async (req: express.Request, res: express.Response) => {
-    let user_id;
+    let userId: string;
     
-    if (req.session.user_id) {
-        user_id = req.session.user_id;
-    } else if (req.query.api_key) {
     try {
-            const user = await userService.authAPIUser(String(req.query.api_key));
+        userId = req.session.user_id ?? (
-            user_id = user.user_id;
+            req.query.api_key && await userService.authAPIUser(String(req.query.api_key))
-        } catch(err) {
+        );
-            console.error(err);
+    } catch(error) {
-            res.send({ error: 'Must be logged in' });
+        console.error(error);
-        }
-    } else {
-        res.send({ error: 'Must be logged in' });
     }
 
-    if (user_id) {
+    if(!userId) {
-        await updateBuilding(req, res, user_id);
+        return res.send({ error: 'Must be logged in' });
     }
-});
 
-async function updateBuilding(req: express.Request, res: express.Response, userId: string) {
     const buildingId = processParam(req.params, 'building_id', parsePositiveIntParam, true);
 
-    const buildingUpdate = req.body;
+    const {
+        attributes = null,
+        user_attributes: userAttributes = null
+    } = req.body;
 
-    let updatedBuilding: object;
     try {
-        updatedBuilding = await buildingService.editBuilding(buildingId, buildingUpdate, userId);
+        const resultUpdate = await buildingService.editBuilding(buildingId, userId, {attributes, userAttributes});
+        
+        res.send({
+            attributes: resultUpdate.attributes,
+            user_attributes: resultUpdate.userAttributes,
+            revision_id: resultUpdate.revisionId
+        });
     } catch(error) {
         if(error instanceof UserError) {
             throw new ApiUserError(error.message, error);
         }
         throw error;
     }
+});
 
-    res.send(updatedBuilding);
-}
 
 // GET building UPRNs
 const getBuildingUPRNsById = asyncController(async (req: express.Request, res: express.Response) => {
@@ -106,21 +116,19 @@ const getBuildingUPRNsById = asyncController(async (req: express.Request, res: e
     }
 });
 
-// GET whether the user likes a building
+const getBuildingUserAttributesById = asyncController(async (req: express.Request, res: express.Response) => {
-const getBuildingLikeById = asyncController(async (req: express.Request, res: express.Response) => {
+    if(!req.session.user_id) {
-    if (!req.session.user_id) {
+        return res.send({ error: 'Must be logged in'});
-        return res.send({ like: false });  // not logged in, so cannot have liked
     }
 
     const buildingId = processParam(req.params, 'building_id', parsePositiveIntParam, true);
 
     try {
-        const like = await buildingService.getBuildingLikeById(buildingId, req.session.user_id);
+        const userAttributes = await buildingService.getBuildingUserAttributesById(buildingId, req.session.user_id);
 
-        // any value returned means like
+        res.send(userAttributes);
-        res.send({ like: like });
     } catch(error) {
-        res.send({ error: 'Database error' });
+        res.send({ error: 'Database error'});
     }
 });
 
@@ -137,31 +145,6 @@ const getBuildingEditHistoryById = asyncController(async (req: express.Request,
     }
 });
 
-// POST update to like/unlike building
-const updateBuildingLikeById = asyncController(async (req: express.Request, res: express.Response) => {
-    if (!req.session.user_id) {
-        return res.send({ error: 'Must be logged in' });
-    }
-
-    const buildingId = processParam(req.params, 'building_id', parsePositiveIntParam, true);
-    const { like } = req.body;
-
-    let updatedBuilding: object;
-    try {
-        updatedBuilding = like ?
-            await buildingService.likeBuilding(buildingId, req.session.user_id) :
-            await buildingService.unlikeBuilding(buildingId, req.session.user_id);
-    } catch(error) {
-        if(error instanceof UserError) {
-            throw new ApiUserError(error.message, error);
-        }
-
-        throw error;
-    }
-
-    res.send(updatedBuilding);
-});
-
 // GET building attributes (and values) as verified by user
 const getUserVerifiedAttributes = asyncController(async (req: express.Request, res: express.Response) => {
     if (!req.session.user_id) {
@@ -219,10 +202,9 @@ export default {
     getBuildingById,
     updateBuildingById,
     getBuildingUPRNsById,
-    getBuildingLikeById,
-    updateBuildingLikeById,
     getUserVerifiedAttributes,
     verifyBuildingAttributes,
     getBuildingEditHistoryById,
-    getLatestRevisionId
+    getLatestRevisionId,
+    getBuildingUserAttributesById
 };

app/src/api/dataAccess/aggregate.ts

@@ -0,0 +1,26 @@
+import { ITask } from 'pg-promise';
+import format from 'pg-format';
+
+import db from '../../db';
+import { DatabaseError } from '../errors/general';
+import { AggregationMethod } from '../config/aggregationsConfig';
+
+export type AggregationMethodFunction = (buildingId: number, attributeName: string, t?: ITask<any>) => Promise<number>;
+
+export async function aggregateCountTrue(buildingId: number, attributeName: string, t?: ITask<any>): Promise<number> {
+    try {
+        // use pg-format here instead of pg-promise parameterised queries as they don't support column name from paraemeter
+        // assume that there won't be more likes than Postgres int range and cast to int
+        // otherwise the count is returned as a bigint which has less support in node-postgres
+        const query = format(`SELECT count(*)::int as agg FROM building_user_attributes WHERE building_id = %L::int AND %I = true;`, buildingId, attributeName);
+        const { agg } = await (t || db).one(query);
+
+        return agg;
+    } catch(error) {
+        throw new DatabaseError(error);
+    }
+}
+
+export const aggregationMethods: Record<AggregationMethod, AggregationMethodFunction> = {
+    'countTrue': aggregateCountTrue
+};

app/src/api/dataAccess/building.ts

@@ -1,15 +1,17 @@
 
 import { errors, ITask } from 'pg-promise';
+import _ from 'lodash';
 
 import db from '../../db';
-import { dataFieldsConfig } from '../config/dataFields';
+import { allAttributesConfig, buildingUserAttributesConfig } from '../config/dataFields';
+import { BaseBuilding, BuildingAttributes, BuildingUserAttributes } from '../models/building';
 import { ArgumentError, DatabaseError } from '../errors/general';
 
 export async function getBuildingData(
     buildingId: number,
     lockForUpdate: boolean = false,
     t?: ITask<any>
-) {
+): Promise<BaseBuilding> {
     let buildingData;
     try {
         buildingData = await (t || db).one(
@@ -55,7 +57,7 @@ export async function insertEditHistoryRevision(
 
 const columnConfigLookup = Object.assign(
     {}, 
-    ...Object.entries(dataFieldsConfig).filter(([, config]) => config.edit || config.derivedEdit).map(([key, {
+    ...Object.entries(allAttributesConfig).filter(([, config]) => config.edit || config.derivedEdit).map(([key, {
         asJson = false,
         sqlCast
     }]) => ({ [key]: {
@@ -70,14 +72,14 @@ export async function updateBuildingData(
     forwardPatch: object,
     revisionId: string,
     t?: ITask<any>
-): Promise<object> {
+): Promise<BuildingAttributes> {
     const columnConfig = Object.entries(forwardPatch).map(([key]) => columnConfigLookup[key]);
     const sets = db.$config.pgp.helpers.sets(forwardPatch, columnConfig);
 
     console.log('Setting', buildingId, sets);
 
     try {
-        return await (t || db).one(
+        const buildingRow: BaseBuilding =  await (t || db).one(
             `UPDATE
                     buildings
                 SET
@@ -90,7 +92,132 @@ export async function updateBuildingData(
                 `,
             [revisionId, sets, buildingId]
         );
+
+        delete buildingRow.building_id;
+        delete buildingRow.geometry_id;
+        delete buildingRow.revision_id;
+
+        return buildingRow as BuildingAttributes;
     } catch(error) {
         throw new DatabaseError(error);
     }
 }
+
+/**
+ * Function that ensures a building-user attribute record exists.
+ * The record is created if there isn't one yet.
+ */
+async function ensureBuildingUserRecord(buildingId: number, userId: string, t: ITask<any>) {
+    try {
+        await t.one(
+            `SELECT * FROM building_user_attributes WHERE building_id = $1 AND user_id = $2;`,
+            [buildingId, userId]
+        );
+    } catch(error) {
+        if(error.code === errors.queryResultErrorCode.noData) {
+            try {
+                await t.none(
+                    'INSERT INTO building_user_attributes (building_id, user_id) VALUES ($1, $2);',
+                    [buildingId, userId]
+                );
+            } catch(error) {
+                throw new DatabaseError(error);
+            }
+        } else {
+            throw new DatabaseError(error);
+        }
+    }
+}
+
+type BuildingUserAttributesRow = BuildingUserAttributes & {
+    building_id: number;
+    user_id: string;
+}
+
+export async function updateBuildingUserData(
+    buildingId: number,
+    userId: string,
+    forwardPatch: object,
+    t?: ITask<any>
+) : Promise<BuildingUserAttributes> {
+    await ensureBuildingUserRecord(buildingId, userId, t);
+
+    const columnConfig = Object.entries(forwardPatch).map(([key]) => columnConfigLookup[key]);
+    const sets = db.$config.pgp.helpers.sets(forwardPatch, columnConfig);
+
+    try {
+        const buildingUserRow: BuildingUserAttributesRow = await (t || db).one(
+            `UPDATE
+                    building_user_attributes
+                SET
+                    $1:raw
+                WHERE
+                    building_id = $2
+                    AND user_id = $3
+                RETURNING
+                    *
+                ;`,
+            [sets, buildingId, userId]
+        );
+
+        delete buildingUserRow.building_id;
+        delete buildingUserRow.user_id;
+
+        return buildingUserRow;
+    } catch(error) {
+        throw new DatabaseError(error);
+    }
+}
+
+async function buildingExists(buildingId: number, t?: ITask<any>) {
+    return (
+        await (t || db).oneOrNone(
+            'SELECT building_id FROM buildings WHERE building_id = $1',
+            [buildingId]
+        )
+    ) !== null;
+}
+
+function makeDefaultUserData() {
+    return _.mapValues(buildingUserAttributesConfig, () => null);
+}
+
+export async function getBuildingUserData(
+    buildingId: number,
+    userId: string,
+    lockForUpdate: boolean = false,
+    t?: ITask<any>
+): Promise<BuildingUserAttributes> {
+    try {
+        const buildingUserRow = await (t || db).oneOrNone(
+            `SELECT
+                *
+            FROM building_user_attributes
+            WHERE
+                building_id = $1
+                AND user_id = $2
+            ${lockForUpdate ? ' FOR UPDATE' : ''};
+            `,
+            [buildingId, userId]
+        );
+
+        if(buildingUserRow) {
+            delete buildingUserRow.building_id;
+            delete buildingUserRow.user_id;
+    
+            return buildingUserRow;
+        } else {
+            if(await buildingExists(buildingId, t)) {
+                return makeDefaultUserData();
+            } else {
+                throw new ArgumentError(`Building ID ${buildingId} does not exist`, 'buildingId');
+            }
+        }
+
+    } catch(error) {
+        if(error instanceof ArgumentError) {
+            throw error;
+        }
+        throw new DatabaseError(error);
+    }
+}

app/src/api/dataAccess/like.ts

@@ -1,49 +0,0 @@
-import { errors, ITask } from 'pg-promise';
-
-import db from '../../db';
-import { DatabaseError, InvalidOperationError } from '../errors/general';
-
-export async function getBuildingLikeCount(buildingId: number, t?: ITask<any>): Promise<number> {
-    try {
-        // assume that there won't be more likes than Postgres int range and cast to int
-        // otherwise the count is return as a bigint which has less support in noode-postgres
-        const result  = await (t || db).one(
-            'SELECT count(*)::int as likes FROM building_user_likes WHERE building_id = $1;',
-            [buildingId]
-        );
-        
-        return result.likes;
-    } catch(error) {
-        throw new DatabaseError(error);
-    }
-}
-
-export async function addBuildingUserLike(buildingId: number, userId: string, t?: ITask<any>): Promise<void> {
-    try {
-        return await (t || db).none(
-            'INSERT INTO building_user_likes ( building_id, user_id ) VALUES ($1, $2);',
-            [buildingId, userId]
-        );
-    } catch(error) {
-        if(error.detail?.includes('already exists')) {
-            throw new InvalidOperationError('User already likes this building');
-        }
-        throw new DatabaseError(error);
-    }
-}
-
-export async function removeBuildingUserLike(buildingId: number, userId: string, t?: ITask<any>): Promise<void> {
-    let result;
-    try {
-        result = await t.result(
-            'DELETE FROM building_user_likes WHERE building_id = $1 AND user_id = $2;',
-            [buildingId, userId]
-        );
-    } catch(error) {
-        throw new DatabaseError(error);
-    }
-
-    if (result.rowCount === 0) {
-        throw new InvalidOperationError("User doesn't like the building, cannot unlike");
-    }
-}

app/src/api/dataAccess/transaction.ts

@@ -0,0 +1,13 @@
+import { ITask } from 'pg-promise';
+
+import db from '../../db';
+
+// Create a transaction mode (serializable, read-write):
+const serializableMode = new db.$config.pgp.txMode.TransactionMode({
+    tiLevel: db.$config.pgp.txMode.isolationLevel.serializable,
+    readOnly: false
+});
+
+export function startUpdateTransaction<T>(cb: (t: ITask<any>) => Promise<T>): Promise<T> {
+    return db.tx({mode: serializableMode}, cb);
+}

app/src/api/models/building.ts

@@ -0,0 +1,24 @@
+import { buildingAttributesConfig, buildingUserAttributesConfig } from '../config/dataFields';
+
+export type BuildingAttributes = { [k in keyof typeof buildingAttributesConfig]: any };
+export type BuildingUserAttributes = { [k in keyof typeof buildingUserAttributesConfig]: any };
+
+export interface BuildingUpdate {
+    attributes?: Partial<BuildingAttributes>;
+    userAttributes?: Partial<BuildingUserAttributes>;
+    revisionId?: string;
+};
+
+export interface BuildingIdentifiers {
+    building_id: number;
+    geometry_id: number;
+    revision_id: string;
+}
+
+export type BaseBuilding = BuildingIdentifiers & BuildingAttributes;
+
+export interface Building extends BaseBuilding {
+    user_attributes: BuildingUserAttributes;
+    edit_history: any[];
+    verified: any;
+}

app/src/api/routes/buildingsRouter.ts

@@ -26,10 +26,6 @@ router.route('/:building_id.json')
 // GET building UPRNs
 router.get('/:building_id/uprns.json', buildingController.getBuildingUPRNsById);
 
-// GET/POST like building
-router.route('/:building_id/like.json')
-    .get(buildingController.getBuildingLikeById)
-    .post(buildingController.updateBuildingLikeById);
 
 // POST verify building attribute
 router.route('/:building_id/verify.json')

app/src/api/services/building/base.ts

@@ -4,56 +4,56 @@
  */
 import _ from 'lodash';
 
-import { pickFields } from '../../../helpers';
-import { dataFieldsConfig } from '../../config/dataFields';
 import * as buildingDataAccess from '../../dataAccess/building';
-import { processBuildingUpdate } from '../domainLogic/processBuildingUpdate';
+import { Building, BuildingUserAttributes } from '../../models/building';
-import { validateBuildingUpdate } from '../domainLogic/validateBuildingUpdate';
-
 import { getBuildingEditHistory } from './history';
-import { updateBuildingData } from './save';
 import { getBuildingVerifications } from './verify';
 
 // data type note: PostgreSQL bigint (64-bit) is handled as string in JavaScript, because of
 // JavaScript numerics are 64-bit double, giving only partial coverage.
 
-export async function getBuildingById(id: number) {
+export interface BuildingMetadataOptions {
-    try {
+    editHistory?: boolean;
-        const building = await buildingDataAccess.getBuildingData(id);
+    verified?: boolean;
 
-        building.edit_history = await getBuildingEditHistory(id);
+    userDataOptions?: {
-        building.verified = await getBuildingVerifications(building);
+        userId: string;
-
+        userAttributes?: boolean;
-        return building;
-    } catch(error) {
-        console.error(error);
-        return undefined;
     }
 }
 
-/**
+export async function getBuildingById(
- * List of fields for which modification is allowed
+    buildingId: number,
- * (directly by the user, or for fields that are derived from others)
+    {
- */
+        editHistory = true,
-const FINAL_FIELD_EDIT_ALLOWLIST = new Set(Object.entries(dataFieldsConfig).filter(([, value]) => value.edit || value.derivedEdit).map(([key]) => key));
+        verified = true,
+        userDataOptions
+    }: BuildingMetadataOptions = {}
+) {
+    const baseBuilding = await buildingDataAccess.getBuildingData(buildingId);
+    const building: Partial<Building> = {...baseBuilding};
 
-export async function editBuilding(buildingId: number, building: any, userId: string): Promise<object> { // TODO add proper building type
+    if(editHistory) {
-    return await updateBuildingData(buildingId, userId, async () => {
+        building.edit_history = await getBuildingEditHistory(buildingId);
-        validateBuildingUpdate(buildingId, building);
+    }
-        const processedBuilding = await processBuildingUpdate(buildingId, building);
 
-        // remove read-only fields from consideration
+    if(verified) {
-        delete processedBuilding.building_id;
+        building.verified = await getBuildingVerifications(baseBuilding);
-        delete processedBuilding.revision_id;
+    }
-        delete processedBuilding.geometry_id;
 
-        // return whitelisted fields to update
+    if(userDataOptions && userDataOptions.userAttributes) {
-        return pickFields(processedBuilding, FINAL_FIELD_EDIT_ALLOWLIST);
+        building.user_attributes = await getBuildingUserAttributesById(buildingId, userDataOptions.userId);
-    });
+    }
+
+    return building;
 }
 
+export async function getBuildingUserAttributesById(buildingId: number, userId: string): Promise<BuildingUserAttributes> {
+    return buildingDataAccess.getBuildingUserData(buildingId, userId);
+}
+
+export * from './edit';
 export * from './history';
-export * from './like';
 export * from './query';
 export * from './uprn';
 export * from './verify';

app/src/api/services/building/edit.ts

@@ -0,0 +1,106 @@
+import _ from 'lodash';
+
+import { BuildingAttributes, BuildingUpdate, BuildingUserAttributes } from '../../models/building';
+import * as buildingDataAccess from '../../dataAccess/building';
+import { startUpdateTransaction } from '../../dataAccess/transaction';
+import { UserError } from '../../errors/general';
+import { aggregateUserAttributes } from '../domainLogic/aggregateUserAttributes'; 
+import { processBuildingUpdate } from '../domainLogic/processBuildingUpdate';
+import { validateChangeSet } from '../domainLogic/validateUpdate';
+import { expireBuildingTileCache } from './tileCache';
+
+
+export async function editBuilding(
+    buildingId: number,
+    userId: string,
+    { attributes, userAttributes } : BuildingUpdate
+): Promise<BuildingUpdate> {
+    // Validate externally provided attributes
+    if(attributes) {
+        validateChangeSet(attributes, true);
+    }
+
+    // Validate externally provided user attributes
+    if(userAttributes) {
+        validateChangeSet(userAttributes, true);
+    }
+
+    const finalUpdate = await startUpdateTransaction(async (t) => {
+        let {
+            attributes: processedAttributes,
+            userAttributes: processedUserAttributes
+        } = await processBuildingUpdate(buildingId, { attributes, userAttributes }, t);
+
+        let resultUserAttributes: BuildingUserAttributes = null;
+
+        if(!_.isEmpty(processedUserAttributes)) {
+            validateChangeSet(processedUserAttributes, false);
+            resultUserAttributes = await buildingDataAccess
+                .updateBuildingUserData(buildingId, userId, processedUserAttributes, t);
+        }
+
+        processedAttributes = await aggregateUserAttributes(
+            buildingId,
+            userId,
+            {
+                attributes: processedAttributes,
+                userAttributes: processedUserAttributes
+            },
+            t
+        );
+
+        let resultAttributes: BuildingAttributes = null;
+
+        let revisionId: string;
+
+        if(processedAttributes) {
+            const oldAttributes = await buildingDataAccess.getBuildingData(buildingId, true, t);
+            const [forwardPatch, reversePatch] = compare(oldAttributes, processedAttributes);
+
+            if(!_.isEmpty(forwardPatch)) {
+                revisionId = await buildingDataAccess
+                    .insertEditHistoryRevision(buildingId, userId, forwardPatch, reversePatch, t);
+                resultAttributes = await buildingDataAccess
+                    .updateBuildingData(buildingId, forwardPatch, revisionId, t);
+            } else {
+                revisionId = oldAttributes.revision_id;
+            }
+        }
+
+        if (resultAttributes == null && resultUserAttributes == null) {
+            throw new UserError('No change provided');
+        }
+
+        return {
+            revisionId: revisionId,
+            attributes: resultAttributes,
+            userAttributes: resultUserAttributes
+        };
+    });
+    
+    expireBuildingTileCache(buildingId);
+
+    return finalUpdate;
+}
+
+/**
+ * Compare old and new data objects, generate shallow merge patch of changed fields
+ * - forward patch is object with {keys: new_values}
+ * - reverse patch is object with {keys: old_values}
+ *
+ * @param {object} oldObj
+ * @param {object} newObj
+ * @param {Set} whitelist
+ * @returns {[object, object]}
+ */
+ function compare(oldObj: object, newObj: object): [object, object] {
+    const reverse = {};
+    const forward = {};
+    for (const [key, value] of Object.entries(newObj)) {
+        if (!_.isEqual(oldObj[key], value)) {
+            reverse[key] = oldObj[key];
+            forward[key] = value;
+        }
+    }
+    return [forward, reverse];
+}

app/src/api/services/building/like.ts

@@ -1,49 +0,0 @@
-import db from '../../../db';
-import * as likeDataAccess from '../../dataAccess/like';
-
-import { updateBuildingData } from './save';
-
-export async function getBuildingLikeById(buildingId: number, userId: string) {
-    try {
-        const res = await db.oneOrNone(
-            'SELECT true as like FROM building_user_likes WHERE building_id = $1 and user_id = $2 LIMIT 1',
-            [buildingId, userId]
-        );
-        return res && res.like;
-    } catch(error) {
-        console.error(error);
-        return undefined;
-    }
-}
-
-export async function likeBuilding(buildingId: number, userId: string) {
-    return await updateBuildingData(
-        buildingId,
-        userId,
-        async (t) => {
-            // return total like count after update
-            return {
-                likes_total: await likeDataAccess.getBuildingLikeCount(buildingId, t)
-            };
-        },
-        (t) => {
-            return likeDataAccess.addBuildingUserLike(buildingId, userId, t);
-        },
-    );
-}
-
-export async function unlikeBuilding(buildingId: number, userId: string) {
-    return await updateBuildingData(
-        buildingId,
-        userId,
-        async (t) => {
-            // return total like count after update
-            return {
-                likes_total: await likeDataAccess.getBuildingLikeCount(buildingId, t)
-            };
-        },
-        async (t) => {
-            return likeDataAccess.removeBuildingUserLike(buildingId, userId, t);
-        },
-    );
-}

app/src/api/services/building/save.ts

@@ -1,81 +0,0 @@
-import { ITask } from 'pg-promise';
-import _ from 'lodash';
-
-import db from '../../../db';
-import * as buildingDataAccess from '../../dataAccess/building';
-import { UserError } from '../../errors/general';
-
-import { expireBuildingTileCache } from './tileCache';
-
-
-const TransactionMode = db.$config.pgp.txMode.TransactionMode;
-const isolationLevel = db.$config.pgp.txMode.isolationLevel;
-
-// Create a transaction mode (serializable, read-write):
-const serializable = new TransactionMode({
-    tiLevel: isolationLevel.serializable,
-    readOnly: false
-});
-
-/**
- * Carry out an update of the buildings data. Allows for running any custom database operations before the main update.
- * All db hooks get passed a transaction.
- * @param buildingId The ID of the building to update
- * @param userId The ID of the user updating the data
- * @param getUpdateValue Function returning the set of attribute to update for the building
- * @param preUpdateDbAction Any db operations to carry out before updating the buildings table (mostly intended for updating the user likes table)
- */
-export async function updateBuildingData(
-    buildingId: number,
-    userId: string,
-    getUpdateValue: (t: ITask<any>) => Promise<object>,
-    preUpdateDbAction?: (t: ITask<any>) => Promise<void>,
-): Promise<object> {
-    return await db.tx({mode: serializable}, async t => {
-        if (preUpdateDbAction != undefined) {
-            await preUpdateDbAction(t);
-        }
-
-        const update = await getUpdateValue(t);
-
-        const oldBuilding = await buildingDataAccess.getBuildingData(buildingId, true, t);
-
-        console.log(update);
-        const patches = compare(oldBuilding, update);
-        console.log('Patching', buildingId, patches);
-        const [forward, reverse] = patches;
-        if (Object.keys(forward).length === 0) {
-            throw new UserError('No change provided');
-        }
-
-        const revisionId = await buildingDataAccess.insertEditHistoryRevision(buildingId, userId, forward, reverse, t);
-
-        const updatedData = await buildingDataAccess.updateBuildingData(buildingId, forward, revisionId, t);
-
-        expireBuildingTileCache(buildingId);
-
-        return updatedData;
-    });
-}
-
-/**
- * Compare old and new data objects, generate shallow merge patch of changed fields
- * - forward patch is object with {keys: new_values}
- * - reverse patch is object with {keys: old_values}
- *
- * @param {object} oldObj
- * @param {object} newObj
- * @param {Set} whitelist
- * @returns {[object, object]}
- */
-function compare(oldObj: object, newObj: object): [object, object] {
-    const reverse = {};
-    const forward = {};
-    for (const [key, value] of Object.entries(newObj)) {
-        if (!_.isEqual(oldObj[key], value)) {
-            reverse[key] = oldObj[key];
-            forward[key] = value;
-        }
-    }
-    return [forward, reverse];
-}

app/src/api/services/building/verify.ts

@@ -1,9 +1,12 @@
-import { dataFieldsConfig } from '../../config/dataFields';
+import { buildingAttributesConfig } from '../../config/dataFields';
+import { BaseBuilding } from '../../models/building';
 import * as buildingDataAccess from '../../dataAccess/building';
 import * as verifyDataAccess from '../../dataAccess/verify';
 import { DatabaseError } from '../../errors/general';
 
-const FIELD_VERIFICATION_WHITELIST = new Set(Object.entries(dataFieldsConfig).filter(([, value]) => value.verify === true).map(([key]) => key));
+function canVerify(key: string) {
+    return buildingAttributesConfig[key].verify === true;
+}
 
 export async function verifyBuildingAttributes(buildingId: number, userId: string, patch: object) {
     // get current building attribute values for comparison
@@ -14,7 +17,7 @@ export async function verifyBuildingAttributes(buildingId: number, userId: strin
     // loop through attribute => value pairs to mark as verified
     for (let [key, value] of Object.entries(patch)) {
         // check key in whitelist
-        if(FIELD_VERIFICATION_WHITELIST.has(key)) {
+        if(canVerify(key)) {
             // check value against current from database - JSON.stringify as hack for "any" data type
             if (JSON.stringify(value) == JSON.stringify(building[key])) {
                 try {
@@ -49,17 +52,14 @@ export async function getUserVerifiedAttributes(buildingId: number, userId: stri
     return await verifyDataAccess.getBuildingUserVerifiedAttributes(buildingId, userId);
 }
 
-export async function getBuildingVerifications(building) {
+export async function getBuildingVerifications(building: BaseBuilding) {
     const verifications = await verifyDataAccess.getBuildingVerifiedAttributes(building.building_id);
 
-    const verified = {};
+    const verified: Record<string, number> = {};
-    for (const element of FIELD_VERIFICATION_WHITELIST) {
-        verified[element] = 0;
-    }
 
     for (const item of verifications) {
         if (JSON.stringify(building[item.attribute]) == JSON.stringify(item.verified_value)) {
-            verified[item.attribute] += 1
+            verified[item.attribute] = verified[item.attribute] ?? 0 + 1;
         }
     }
     return verified;

app/src/api/services/domainLogic/aggregateUserAttributes.ts

@@ -0,0 +1,23 @@
+import { ITask } from 'pg-promise';
+import { BuildingAttributes, BuildingUpdate } from '../../models/building';
+import { aggregationsConfig } from '../../config/aggregationsConfig';
+import { aggregationMethods } from '../../dataAccess/aggregate';
+
+export async function aggregateUserAttributes(
+    buildingId: number,
+    userId: string,
+    { attributes, userAttributes } : BuildingUpdate,
+    t?: ITask<any>
+): Promise<Partial<BuildingAttributes>> {
+    const derivedAttributes: Partial<BuildingAttributes> = {};
+
+    for(let [key, aggregations] of Object.entries(aggregationsConfig)) {
+        if(key in userAttributes) {
+            for(let config of aggregations) {
+                derivedAttributes[config.aggregateFieldName] = await aggregationMethods[config.aggregationMethod](buildingId, key, t);
+            }
+        }
+    }
+
+    return Object.assign({}, attributes, derivedAttributes);
+}

app/src/api/services/domainLogic/processBuildingUpdate.ts

@@ -1,7 +1,8 @@
 import _ from 'lodash';
+import { ITask } from 'pg-promise';
 
 import { hasAnyOwnProperty } from '../../../helpers';
-import { Building, BuildingUpdate } from '../../config/dataFields';
+import { BaseBuilding, BuildingAttributes, BuildingUpdate } from '../../models/building';
 import { getBuildingData } from '../../dataAccess/building';
 import { ArgumentError } from '../../errors/general';
 
@@ -10,7 +11,11 @@ import { updateLandUse } from './landUse';
 /**
  * Process land use classifications - derive land use order from land use groups
  */
-async function processCurrentLandUseClassifications(buildingId: number, buildingUpdate: any): Promise<any> {
+async function processCurrentLandUseClassifications(
+    buildingId: number,
+    buildingUpdate: Partial<BuildingAttributes>,
+    t?: ITask<any>
+): Promise<any> {
     const currentBuildingData = await getBuildingData(buildingId);
 
     try {
@@ -39,10 +44,14 @@ async function processCurrentLandUseClassifications(buildingId: number, building
 /**
  * Process Dynamics data - check field relationships and sort demolished buildings by construction date
  */
-async function processDynamicsDemolishedBuildings(buildingId: number, buildingUpdate: BuildingUpdate): Promise<BuildingUpdate> {
+async function processDynamicsDemolishedBuildings(
+    buildingId: number,
+    attributesUpdate: Partial<BuildingAttributes>,
+    t?: ITask<any>
+): Promise<Partial<BuildingAttributes>> {
     const currentBuildingData = await getBuildingData(buildingId);
 
-    const afterUpdate: Building = Object.assign({}, currentBuildingData, buildingUpdate);
+    const afterUpdate: BaseBuilding = Object.assign({}, currentBuildingData, attributesUpdate);
     
     const hasDemolished: boolean = afterUpdate.dynamics_has_demolished_buildings;
     const demolishedList: any[] = afterUpdate.demolished_buildings;
@@ -57,24 +66,27 @@ async function processDynamicsDemolishedBuildings(buildingId: number, buildingUp
         }
     }
 
-    if(buildingUpdate.demolished_buildings != undefined) {
+    if(attributesUpdate.demolished_buildings != undefined) {
-        buildingUpdate.demolished_buildings = buildingUpdate.demolished_buildings.sort((a, b) => b.year_constructed.min - a.year_constructed.min);
+        attributesUpdate.demolished_buildings = attributesUpdate.demolished_buildings.sort((a, b) => b.year_constructed.min - a.year_constructed.min);
     }
 
-    return buildingUpdate;
+    return attributesUpdate;
 }
 
 
 /**
  * Define any custom processing logic for specific building attributes
  */
-export async function processBuildingUpdate(buildingId: number, buildingUpdate: BuildingUpdate): Promise<any> {
+export async function processBuildingUpdate(buildingId: number, {attributes, userAttributes}: BuildingUpdate, t?: ITask<any>): Promise<BuildingUpdate> {
-    if(hasAnyOwnProperty(buildingUpdate, ['current_landuse_group'])) {
+    if(hasAnyOwnProperty(attributes, ['current_landuse_group'])) {
-        buildingUpdate = await processCurrentLandUseClassifications(buildingId, buildingUpdate);
+        attributes = await processCurrentLandUseClassifications(buildingId, attributes, t);
     }
-    if(hasAnyOwnProperty(buildingUpdate, ['demolished_buildings', 'dynamics_has_demolished_buildings'])) {
+    if(hasAnyOwnProperty(attributes, ['demolished_buildings', 'dynamics_has_demolished_buildings'])) {
-        buildingUpdate = await processDynamicsDemolishedBuildings(buildingId, buildingUpdate);
+        attributes = await processDynamicsDemolishedBuildings(buildingId, attributes, t);
     }
 
-    return buildingUpdate;
+    return {
+        attributes,
+        userAttributes
+    };
 }

app/src/api/services/domainLogic/validateBuildingUpdate.ts

@@ -1,28 +0,0 @@
-import Ajv from 'ajv';
-import addFormats from 'ajv-formats';
-
-import { mapObject } from '../../../helpers';
-import { InvalidFieldError, FieldTypeError } from '../../errors/general';
-import { dataFieldsConfig } from '../../config/dataFields';
-import { fieldSchemaConfig } from '../../config/fieldSchemaConfig';
-
-const ajv = new Ajv();
-addFormats(ajv);
-
-const compiledSchemas = mapObject(fieldSchemaConfig, ([, val]) => ajv.compile(val))
-
-const EXTERNAL_FIELD_EDIT_ALLOWLIST = new Set(Object.entries(dataFieldsConfig).filter(([, value]) => value.edit).map(([key]) => key));
-
-export function validateBuildingUpdate(buildingId: number, building: any) {
-    for(const field of Object.keys(building)) {
-        if(!EXTERNAL_FIELD_EDIT_ALLOWLIST.has(field)) {
-            throw new InvalidFieldError('Field is not editable', field);
-        }
-        
-        if(field in compiledSchemas) {
-            if(!compiledSchemas[field](building[field])) {
-                throw new FieldTypeError('Invalid format of data sent', field);
-            }
-        }
-    }
-}

app/src/api/services/domainLogic/validateUpdate.ts

@@ -0,0 +1,39 @@
+import Ajv from 'ajv';
+import addFormats from 'ajv-formats';
+import _ from 'lodash';
+
+import { InvalidFieldError, FieldTypeError } from '../../errors/general';
+import { allAttributesConfig } from '../../config/dataFields';
+import { BuildingAttributes, BuildingUserAttributes } from '../../models/building';
+import { fieldSchemaConfig } from '../../config/fieldSchemaConfig';
+
+const ajv = new Ajv();
+addFormats(ajv);
+
+const compiledSchemas = _.mapValues(fieldSchemaConfig, (val) => ajv.compile(val));
+
+function canEdit(key: string, allowDerived: boolean = false) {
+    const config = allAttributesConfig[key];
+    
+    return config.edit || (allowDerived && config.derivedEdit);
+}
+
+export function validateFieldChange(field: string, value: any, isExternal: boolean = true) {
+    const allowDerived = !isExternal;
+    if(!canEdit(field, allowDerived)) {
+        throw new InvalidFieldError('Field is not editable', field);
+    }
+    
+    if(field in compiledSchemas) {
+        if(!compiledSchemas[field](value)) {
+            throw new FieldTypeError('Invalid format of data sent', field);
+        }
+    }
+}
+
+export function validateChangeSet(
+    attributes: Partial<BuildingAttributes> | Partial<BuildingUserAttributes>,
+    isExternal: boolean = true
+) {
+    _.forIn(attributes, (value, fieldKey) => validateFieldChange(fieldKey, value, isExternal));
+}

app/src/api/services/user.ts

@@ -142,9 +142,9 @@ async function getNewUserAPIKey(id: string) {
     }
 }
 
-async function authAPIUser(key: string) {
+async function authAPIUser(key: string): Promise<string> {
     try {
-        return await db.one(
+        const { user_id } = await db.one(
             `SELECT
                 user_id
             FROM
@@ -155,6 +155,8 @@ async function authAPIUser(key: string) {
                 key
             ]
         );
+
+        return user_id;
     } catch(error) {
         console.error('Error:', error);
         return undefined;

app/src/client.tsx

@@ -15,7 +15,6 @@ hydrate(
         <App
             user={data.user}
             building={data.building}
-            building_like={data.building_like}
             user_verified={data.user_verified}
             revisionId={data.latestRevisionId}
         />

app/src/frontend/api-data/building-update.ts

@@ -0,0 +1,48 @@
+import { BuildingAttributes, BuildingEdits, BuildingUserAttributes } from '../models/building';
+import { apiPost } from '../apiHelpers';
+import { buildingUserFields, dataFields } from '../config/data-fields-config';
+
+export type UpdatedBuilding = Partial<BuildingAttributes> & Partial<BuildingUserAttributes> & {
+    revision_id: string;
+};
+
+function makeUpdateData(edits: BuildingEdits) {
+    const data = {
+        attributes: {},
+        user_attributes: {}
+    };
+
+    for (let [field, value] of Object.entries(edits)) {
+        if (dataFields[field]) {
+            data.attributes[field] = value;
+        } else if (buildingUserFields[field]) {
+            data.user_attributes[field] = value;
+        }
+    }
+
+    return data;
+}
+
+export async function sendBuildingUpdate(buildingId: number, edits: BuildingEdits): Promise<UpdatedBuilding> {
+    const requestData = makeUpdateData(edits);
+    const data = await apiPost(
+        `/api/buildings/${buildingId}.json`,
+        requestData
+    );
+
+    if (data.error) {
+        throw data.error;
+    } else {
+        const {
+            revision_id,
+            attributes,
+            user_attributes
+        } = data;
+
+       return {
+            revision_id,
+            ...attributes,
+            ...user_attributes
+        };
+    }
+}

app/src/frontend/api-data/use-building-data.ts

@@ -3,7 +3,14 @@ import { useCallback, useEffect, useState } from 'react';
 import { Building, BuildingAttributeVerificationCounts } from '../models/building';
 import { apiGet } from '../apiHelpers';
 
-export function useBuildingData(buildingId: number, preloadedData: Building): [Building, (updatedBuilding: Building) => void, () => void] {
+/**
+ * 
+ * @param buildingId Requested building ID
+ * @param preloadedData Data preloaded through SSR, to return before the request is first sent
+ * @param includeUserAttributes Should the building-user attributes be included in the result? This requires login session cookies to be present
+ * @returns 
+ */
+export function useBuildingData(buildingId: number, preloadedData: Building, includeUserAttributes: boolean = false): [Building, (updatedBuilding: Building) => void, () => void] {
     const [buildingData, setBuildingData] = useState<Building>(preloadedData);
     const [isOld, setIsOld] = useState<boolean>(preloadedData == undefined);
 
@@ -14,12 +21,14 @@ export function useBuildingData(buildingId: number, preloadedData: Building): [B
             return;
         }
         try {
-            const [building, buildingUprns] = await Promise.all([
+            let [building, buildingUprns] = await Promise.all([
-                apiGet(`/api/buildings/${buildingId}.json`),
+                apiGet(`/api/buildings/${buildingId}.json${includeUserAttributes ? '?user_attributes=true' : ''}`),
                 apiGet(`/api/buildings/${buildingId}/uprns.json`)
             ]);
 
             building.uprns = buildingUprns.uprns;
+            building = Object.assign(building, {...building.user_attributes});
+            delete building.user_attributes;
 
             setBuildingData(building);
         } catch(error) {

app/src/frontend/app.tsx

@@ -32,7 +32,6 @@ import { NotFound } from './pages/not-found';
 interface AppProps {
     user?: User;
     building?: Building;
-    building_like?: boolean;
     user_verified?: UserVerified;
     revisionId: string;
 }
@@ -83,7 +82,6 @@ export const App: React.FC<AppProps> = props => {
                 <Route exact path={mapAppPaths} >
                     <MapApp
                         building={props.building}
-                        building_like={props.building_like}
                         user_verified={props.user_verified}
                         revisionId={props.revisionId}
                     />

app/src/frontend/building/building-view.tsx

@@ -11,10 +11,8 @@ interface BuildingViewProps {
     cat: Category;
     mode: 'view' | 'edit';
     building?: Building;
-    building_like?: boolean;
     user_verified?: any;
     onBuildingUpdate: (buildingId: number, updatedData: Building) => void;
-    onBuildingLikeUpdate: (buildingId: number, updatedData: boolean) => void;
     onUserVerifiedUpdate: (buildingId: number, updatedData: UserVerified) => void;
 }
 

app/src/frontend/building/data-components/like-data-entry.tsx

@@ -1,47 +1,43 @@
 import React, { Fragment } from 'react';
 import { NavLink } from 'react-router-dom';
 
-import Tooltip from '../../components/tooltip';
+import { buildingUserFields, dataFields } from '../../config/data-fields-config';
-import { Category } from '../../config/categories-config';
+import { CopyProps } from '../data-containers/category-view-props';
+import { DataTitleCopyable } from './data-title';
 
 
 interface LikeDataEntryProps {
     mode: 'view' | 'edit' | 'multi-edit';
-    userLike: boolean;
+    userValue: boolean;
-    totalLikes: number;
+    aggregateValue: number;
-    onLike: (userLike: boolean) => void;
+    copy: CopyProps;
+    onChange: (key: string, value: boolean) => void;
 }
 
 const LikeDataEntry: React.FunctionComponent<LikeDataEntryProps> = (props) => {
-    const data_string = JSON.stringify({like: true});
+    const fieldName = 'community_like';
+
     return (
         <>
-            <div className="data-title">
+        <DataTitleCopyable
-                <div className="data-title-actions icon-buttons">
+            slug={fieldName}
-                    <NavLink
+            title={buildingUserFields.community_like.title}
-                        to={`/multi-edit/${Category.Community}?data=${data_string}`}
+            copy={props.copy}
-                        className="icon-button like">
+        />
-                        Like more
-                    </NavLink>
-                    <Tooltip text="People who like the building and think it contributes to the city." />
-                </div>
-                <label>Like</label>
-            </div>
             <label className="form-check-label">
                 <input className="form-check-input" type="checkbox"
                     name="like"
-                    checked={!!props.userLike}
+                    checked={!!props.userValue}
                     disabled={props.mode === 'view'}
-                    onChange={e => props.onLike(e.target.checked)}
+                    onChange={e => props.onChange(fieldName, e.target.checked)}
-                />
+                /> Yes
-                 I like this building and think it contributes to the city
             </label>
             <p>
                 {
-                    (props.totalLikes != null)?
+                    (props.aggregateValue != null)?
-                        (props.totalLikes === 1)?
+                        (props.aggregateValue === 1)?
-                            `${props.totalLikes} person likes this building`
+                            `${props.aggregateValue} person likes this building`
-                            : `${props.totalLikes} people like this building`
+                            : `${props.aggregateValue} people like this building`
                         : "0 people like this building so far - you could be the first!"
                 }
             </p>

app/src/frontend/building/data-container.tsx

@@ -1,12 +1,14 @@
 import React, { Fragment } from 'react';
 import { NavLink, Redirect } from 'react-router-dom';
 import Confetti from 'canvas-confetti';
+import _ from 'lodash';
 
 import { apiPost } from '../apiHelpers';
+import { sendBuildingUpdate } from '../api-data/building-update';
 import ErrorBox from '../components/error-box';
 import InfoBox from '../components/info-box';
 import { compareObjects } from '../helpers';
-import { Building, BuildingAttributes, UserVerified } from '../models/building';
+import { Building, BuildingEdits, BuildingUserAttributes, UserVerified } from '../models/building';
 import { User } from '../models/user';
 
 import ContainerHeader from './container-header';
@@ -26,10 +28,8 @@ interface DataContainerProps {
     user?: User;
     mode: 'view' | 'edit';
     building?: Building;
-    building_like?: boolean;
     user_verified?: any;
     onBuildingUpdate: (buildingId: number, updatedData: Building) => void;
-    onBuildingLikeUpdate: (buildingId: number, updatedData: boolean) => void;
     onUserVerifiedUpdate: (buildingId: number, updatedData: UserVerified) => void;
 }
 
@@ -39,7 +39,7 @@ interface DataContainerState {
     keys_to_copy: {[key: string]: boolean};
     currentBuildingId: number;
     currentBuildingRevisionId: number;
-    buildingEdits: Partial<Building>;
+    buildingEdits: BuildingEdits;
 }
 
 export type DataContainerType = React.ComponentType<DataContainerProps>;
@@ -68,7 +68,6 @@ const withCopyEdit: (wc: React.ComponentType<CategoryViewProps>) => DataContaine
 
             this.handleChange = this.handleChange.bind(this);
             this.handleReset = this.handleReset.bind(this);
-            this.handleLike = this.handleLike.bind(this);
             this.handleSubmit = this.handleSubmit.bind(this);
             this.handleVerify = this.handleVerify.bind(this);
             this.handleSaveAdd = this.handleSaveAdd.bind(this);
@@ -78,7 +77,7 @@ const withCopyEdit: (wc: React.ComponentType<CategoryViewProps>) => DataContaine
             this.toggleCopyAttribute = this.toggleCopyAttribute.bind(this);
         }
 
-        static getDerivedStateFromProps(props, state) {
+        static getDerivedStateFromProps(props, state): DataContainerState {
             const newBuildingId = props.building == undefined ? undefined : props.building.building_id;
             const newBuildingRevisionId = props.building == undefined ? undefined : props.building.revision_id;
             if(newBuildingId !== state.currentBuildingId || newBuildingRevisionId > state.currentBuildingRevisionId) {
@@ -122,9 +121,8 @@ const withCopyEdit: (wc: React.ComponentType<CategoryViewProps>) => DataContaine
         }
 
         isEdited() {
-            const edits = this.state.buildingEdits;
             // check if the edits object has any fields
-            return Object.entries(edits).length !== 0;
+            return !_.isEmpty(this.state.buildingEdits);
         }
 
         clearEdits() {
@@ -166,46 +164,15 @@ const withCopyEdit: (wc: React.ComponentType<CategoryViewProps>) => DataContaine
             this.clearEdits();
         }
 
-        /**
+        async doSubmit(edits: Partial<Building & BuildingUserAttributes>) {
-         * Handle likes separately
-         * - like/love reaction is limited to set/unset per user
-         *
-         * @param {*} event
-         */
-        async handleLike(like: boolean) {
-            try {
-                const data = await apiPost(
-                    `/api/buildings/${this.props.building.building_id}/like.json`,
-                    {like: like}
-                );
-
-                if (data.error) {
-                    this.setState({error: data.error});
-                } else {
-                    // like endpoint returns whole building data so we can update both
-                    this.props.onBuildingUpdate(this.props.building.building_id, data);
-                    this.props.onBuildingLikeUpdate(this.props.building.building_id, like);
-                }
-            } catch(err) {
-                this.setState({error: err});
-            }
-        }
-
-        async doSubmit(edits: Partial<BuildingAttributes>) {
             this.setState({error: undefined});
-            try {
-                const data = await apiPost(
-                    `/api/buildings/${this.props.building.building_id}.json`,
-                    edits
-                );
             
-                if (data.error) {
+            try {
-                    this.setState({error: data.error});
+                const buildingUpdate = await sendBuildingUpdate(this.props.building.building_id, edits);
-                } else {
+                const updatedBuilding = Object.assign({}, this.props.building, buildingUpdate);
-                    this.props.onBuildingUpdate(this.props.building.building_id, data);
+                this.props.onBuildingUpdate(this.props.building.building_id, updatedBuilding);
-                }
+            } catch(error) {
-            } catch(err) {
+                this.setState({ error });
-                this.setState({error: err});
             }
         }
 
@@ -351,12 +318,10 @@ const withCopyEdit: (wc: React.ComponentType<CategoryViewProps>) => DataContaine
                             <WrappedComponent
                                 intro={this.props.intro}
                                 building={this.props.building}
-                                building_like={this.props.building_like}
                                 mode={this.props.mode}
                                 edited={false}
                                 copy={copy}
                                 onChange={undefined}
-                                onLike={undefined}
                                 onVerify={undefined}
                                 onSaveAdd={undefined}
                                 onSaveChange={undefined}
@@ -404,12 +369,10 @@ const withCopyEdit: (wc: React.ComponentType<CategoryViewProps>) => DataContaine
                                 <WrappedComponent
                                     intro={this.props.intro}
                                     building={currentBuilding}
-                                    building_like={this.props.building_like}
                                     mode={this.props.mode}
                                     edited={edited}
                                     copy={copy}
                                     onChange={this.handleChange}
-                                    onLike={this.handleLike}
                                     onVerify={this.handleVerify}
                                     onSaveAdd={this.handleSaveAdd}
                                     onSaveChange={this.handleSaveChange}

app/src/frontend/building/data-containers/category-view-props.ts

@@ -10,12 +10,10 @@ interface CopyProps {
 interface CategoryViewProps {
     intro: string;
     building: Building;
-    building_like: boolean;
     mode: 'view' | 'edit' | 'multi-edit';
     edited: boolean;
     copy: CopyProps;
     onChange: (key: string, value: any) => void;
-    onLike: (like: boolean) => void;
     onVerify: (slug: string, verify: boolean, x: number, y: number) => void;
 
     /* Special handler for adding and immediately saving a new item of an array-like attribute */

app/src/frontend/building/data-containers/community.tsx

@@ -1,23 +1,43 @@
-import React, { Fragment } from 'react';
+import React from 'react';
 
 import withCopyEdit from '../data-container';
 import LikeDataEntry from '../data-components/like-data-entry';
 
 import { CategoryViewProps } from './category-view-props';
+import InfoBox from '../../components/info-box';
+import { LogicalDataEntry } from '../data-components/logical-data-entry/logical-data-entry';
+import { dataFields } from '../../config/data-fields-config';
 
 /**
 * Community view/edit section
 */
 const CommunityView: React.FunctionComponent<CategoryViewProps> = (props) => (
-    <Fragment>
+    <>
+        <InfoBox>
+        Can you help add information on how well you think the building works, and on if it is in public ownership?
+        </InfoBox>
         <LikeDataEntry
-            userLike={props.building_like}
+            userValue={props.building.community_like}
-            totalLikes={props.building.likes_total}
+            aggregateValue={props.building.likes_total}
+
+            onChange={props.onSaveChange}
             mode={props.mode}
-            onLike={props.onLike}
+            copy={props.copy}
         />
-        <p className="data-intro">{props.intro}</p>
+{/*         
-        <ul className="data-list">
+        <LogicalDataEntry
+            slug='community_publicly_owned'
+            title={dataFields.community_publicly_owned.title}
+            value={props.building.community_publicly_owned}
+            disallowFalse={props.building.community_public_ownership_form != null}
+            disallowNull={props.building.community_public_ownership_form != null}
+
+            onChange={props.onSaveChange}
+            mode={props.mode}
+            copy={props.copy}
+        /> */}
+        {/* <p className="data-intro">{props.intro}</p> */}
+        {/* <ul className="data-list">
             <li>Is this a publicly owned building?</li>
             {
             // "slug": "community_publicly_owned",
@@ -33,8 +53,8 @@ const CommunityView: React.FunctionComponent<CategoryViewProps> = (props) => (
             // "slug": "community_asset",
             // "type": "checkbox"
             }
-        </ul>
+        </ul> */}
-    </Fragment>
+    </>
 );
 const CommunityContainer = withCopyEdit(CommunityView);
 

app/src/frontend/building/multi-edit.tsx

@@ -4,10 +4,9 @@ import { Link } from 'react-router-dom';
 import { useMultiEditData } from '../hooks/use-multi-edit-data';
 import ErrorBox from '../components/error-box';
 import InfoBox from '../components/info-box';
-import { dataFields } from '../config/data-fields-config';
+import { allFieldsConfig } from '../config/data-fields-config';
 
 import DataEntry from './data-components/data-entry';
-import { Category } from '../config/categories-config';
 
 interface MultiEditProps {
     category: string;
@@ -16,34 +15,24 @@ interface MultiEditProps {
 const MultiEdit: React.FC<MultiEditProps> = (props) => {
     const [data, error] = useMultiEditData();
 
-    const isLike = props.category === Category.Community;
-
     return (
         <section className='data-section'>
             <header className={`section-header view ${props.category} background-${props.category}`}>
-                <h2 className="h2">{
+                <h2 className="h2">Paste {props.category} data</h2>
-                    isLike ?
-                        <>Like Me!</> :
-                        <>Copy {props.category} data</>
-                }</h2>
             </header>
             <div className="section-body">
                 <form>
                     {
                         error ?
                             <ErrorBox msg={error} /> :
-                            <InfoBox msg={
+                            <InfoBox msg='Click buildings one at a time to colour using the data below' />
-                                isLike ?
-                                    'Click all the buildings that you like and think contribute to the city!' :
-                                    'Click buildings one at a time to colour using the data below'
-                            } />
                     }
                     {
-                        !isLike && data &&
+                        data &&
                         Object.keys(data).map((key => (
                             <DataEntry
                                 key={key}
-                                title={dataFields[key]?.title ?? `Unknown field (${key})`}
+                                title={allFieldsConfig[key]?.title ?? `Unknown field (${key})`}
                                 slug={key}
                                 disabled={true}
                                 value={data[key]}

app/src/frontend/config/data-fields-config.ts

@@ -45,8 +45,25 @@ export interface DataFieldDefinition {
      * E.g. for building attachment form, you could use "Detached" as example
      */
     example: any;
+
+    /**
+     * Whether the field is a field that has an independent value for each user.
+     * For example, user building likes are one of such fields.
+     * By default this is false - fields are treated as not user-specific.
+     */
+    perUser?: boolean;
 }
 
+export const buildingUserFields = {
+    community_like: {
+        perUser: true,
+        category: Category.Community,
+        title: "Do you like this building and think it contributes to the city?",
+        example: true,
+    },
+};
+
+
 export const dataFields = { /* eslint-disable @typescript-eslint/camelcase */
     location_name: {
         category: Category.Location,
@@ -444,6 +461,9 @@ export const dataFields = { /* eslint-disable @typescript-eslint/camelcase */
         category: Category.Community,
         title: "Total number of likes",
         example: 100,
+        tooltip: "People who like the building and think it contributes to the city."
+    },
+
     },
 
     dynamics_has_demolished_buildings: {
@@ -486,3 +506,5 @@ export const dataFields = { /* eslint-disable @typescript-eslint/camelcase */
         ]
     }
 };
+
+export const allFieldsConfig = {...dataFields, ...buildingUserFields};

app/src/frontend/map-app.tsx

@@ -2,14 +2,12 @@ import React, { useCallback, useEffect, useState } from 'react';
 import { Redirect, Route, Switch } from 'react-router-dom';
 import loadable from '@loadable/component';
 
-import { useRevisionId } from './hooks/use-revision';
+import { useRevisionId } from './api-data/use-revision';
-import { useBuildingData } from './hooks/use-building-data';
+import { useBuildingData } from './api-data/use-building-data';
-import { useBuildingLikeData } from './hooks/use-building-like-data';
+import { useUserVerifiedData } from './api-data/use-user-verified-data';
-import { useUserVerifiedData } from './hooks/use-user-verified-data';
 import { useUrlBuildingParam } from './nav/use-url-building-param';
 import { useUrlCategoryParam } from './nav/use-url-category-param';
 import { useUrlModeParam } from './nav/use-url-mode-param';
-import { apiPost } from './apiHelpers';
 import BuildingView from './building/building-view';
 import Categories from './building/categories';
 import { EditHistory } from './building/edit-history/edit-history';
@@ -22,6 +20,8 @@ import { useLastNotEmpty } from './hooks/use-last-not-empty';
 import { Category } from './config/categories-config';
 import { defaultMapCategory } from './config/category-maps-config';
 import { useMultiEditData } from './hooks/use-multi-edit-data';
+import { useAuth } from './auth-context';
+import { sendBuildingUpdate } from './api-data/building-update';
 
 /**
  * Load and render ColouringMap component on client-side only.
@@ -41,7 +41,6 @@ const ColouringMap = loadable(
 
 interface MapAppProps {
     building?: Building;
-    building_like?: boolean;
     revisionId?: string;
     user_verified?: object;
 }
@@ -61,6 +60,7 @@ function setOrToggle<T>(currentValue: T, newValue: T): T {
 }
 
 export const MapApp: React.FC<MapAppProps> = props => {
+    const { user } = useAuth();
     const [categoryUrlParam] = useUrlCategoryParam();
 
     const [currentCategory, setCategory] = useState<Category>();
@@ -70,8 +70,7 @@ export const MapApp: React.FC<MapAppProps> = props => {
     
     const [selectedBuildingId, setSelectedBuildingId] = useUrlBuildingParam('view', displayCategory);
     
-    const [building, updateBuilding, reloadBuilding] = useBuildingData(selectedBuildingId, props.building);
+    const [building, updateBuilding, reloadBuilding] = useBuildingData(selectedBuildingId, props.building, user != undefined);
-    const [buildingLike, updateBuildingLike] = useBuildingLikeData(selectedBuildingId, props.building_like);
     const [userVerified, updateUserVerified, reloadUserVerified] = useUserVerifiedData(selectedBuildingId, props.user_verified);
     
     const [revisionId, updateRevisionId] = useRevisionId(props.revisionId);
@@ -94,20 +93,9 @@ export const MapApp: React.FC<MapAppProps> = props => {
         const buildingId = building?.building_id;
 
         if(buildingId != undefined && multiEditError == undefined) {
-            const isLike = currentCategory === Category.Community;
-            const endpoint = isLike ?
-                `/api/buildings/${buildingId}/like.json`:
-                `/api/buildings/${buildingId}.json`;
-
-            const payload = isLike ? {like: true} : multiEditData;
-
             try {
-                const res = await apiPost(endpoint, payload);
+                const updatedBuilding = await sendBuildingUpdate(buildingId, multiEditData);
-                if(res.error) {
+                updateRevisionId(updatedBuilding.revision_id);
-                    console.error({ error: res.error });
-                } else {
-                    updateRevisionId(res.revision_id);
-                }
             } catch(error) {
                 console.error({ error });
             }
@@ -124,13 +112,6 @@ export const MapApp: React.FC<MapAppProps> = props => {
         }
     }, [selectedBuildingId, building, updateBuilding, updateRevisionId]);
 
-    const handleBuildingLikeUpdate = useCallback((buildingId: number, updatedData: boolean) => {
-        // only update current building data if the IDs match
-        if(buildingId === selectedBuildingId) {
-            updateBuildingLike(updatedData);
-        }
-    }, [selectedBuildingId, updateBuildingLike]);
-
     const handleUserVerifiedUpdate = useCallback((buildingId: number, updatedData: UserVerified) => {
         // only update current building data if the IDs match
         if(buildingId === selectedBuildingId) {
@@ -162,10 +143,8 @@ export const MapApp: React.FC<MapAppProps> = props => {
                                     mode={viewEditMode}
                                     cat={displayCategory}
                                     building={building}
-                                    building_like={buildingLike}
                                     user_verified={userVerified ?? {}}
                                     onBuildingUpdate={handleBuildingUpdate}
-                                    onBuildingLikeUpdate={handleBuildingLikeUpdate}
                                     onUserVerifiedUpdate={handleUserVerifiedUpdate}
                                 />
                             </Route>

app/src/frontend/models/building.ts

@@ -1,4 +1,6 @@
-import { dataFields } from '../config/data-fields-config';
+import { buildingUserFields, dataFields } from '../config/data-fields-config';
+
+type AttributesBasedOnExample<T extends Record<string, {example: any}>> = {[key in keyof T]: T[key]['example']};
 
 /**
  * A type representing the types of a building's attributes.
@@ -6,16 +8,19 @@ import { dataFields } from '../config/data-fields-config';
  * If a TS error starting with "Type 'example' cannot be used to index type [...]" appears here,
  * that means an example field is most probably missing on one of the config definitions in dataFieldsConfig.
  */
-export type BuildingAttributes = {[key in keyof typeof dataFields]: (typeof dataFields)[key]['example']};
+export type BuildingAttributes = AttributesBasedOnExample<typeof dataFields>;
+export type BuildingUserAttributes = AttributesBasedOnExample<typeof buildingUserFields>;
 
 export type BuildingAttributeVerificationCounts = {[key in keyof typeof dataFields]: number};
 
 export type UserVerified = {[key in keyof BuildingAttributes]?: BuildingAttributes[key]};
 
-export interface Building extends BuildingAttributes {
+export interface Building extends BuildingAttributes, BuildingUserAttributes {
     building_id: number;
     geometry_id: number;
     revision_id: string;
 
     verified: BuildingAttributeVerificationCounts;
 }
+
+export type BuildingEdits = Partial<BuildingAttributes & BuildingUserAttributes>;

app/src/frontendRoute.tsx

@@ -6,7 +6,6 @@ import serialize from 'serialize-javascript';
 
 import {
     getBuildingById,
-    getBuildingLikeById,
     getBuildingUPRNsById,
     getLatestRevisionId,
     getUserVerifiedAttributes
@@ -34,11 +33,13 @@ const frontendRoute = asyncController(async (req: express.Request, res: express.
     }
 
     try {
-        let [user, building, uprns, buildingLike, userVerified, latestRevisionId] = await Promise.all([
+        let [user, building, uprns, userVerified, latestRevisionId] = await Promise.all([
             userId ? getUserById(userId) : undefined,
-            isBuilding ? getBuildingById(buildingId) : undefined,
+            isBuilding ? getBuildingById(
+                buildingId,
+                { userDataOptions: userId ? { userId, userAttributes: true } : null }
+            ) : undefined,
             isBuilding ? getBuildingUPRNsById(buildingId) : undefined,
-            (isBuilding && userId) ? getBuildingLikeById(buildingId, userId) : false,
             (isBuilding && userId) ? getUserVerifiedAttributes(buildingId, userId) : {},
             getLatestRevisionId()
         ]);
@@ -48,7 +49,6 @@ const frontendRoute = asyncController(async (req: express.Request, res: express.
         }
         data.user = user;
         data.building = building;
-        data.building_like = buildingLike;
         data.user_verified = userVerified;
         if (data.building != null) {
             data.building.uprns = uprns;
@@ -59,7 +59,6 @@ const frontendRoute = asyncController(async (req: express.Request, res: express.
         console.error(error);
         data.user = undefined;
         data.building = undefined;
-        data.building_like = undefined;
         data.user_verified = {}
         data.latestRevisionId = 0;
         context.status = 500;
@@ -73,7 +72,6 @@ function renderHTML(context, data, req, res) {
             <App
                 user={data.user}
                 building={data.building}
-                building_like={data.building_like}
                 revisionId={data.latestRevisionId}
                 user_verified={data.userVerified}
             />

migrations/unreleased/0xx.building-user-attributes.down.sql

@@ -0,0 +1 @@
+DROP TABLE IF EXISTS building_user_attributes;

migrations/unreleased/0xx.building-user-attributes.up.sql

@@ -0,0 +1,15 @@
+CREATE TABLE public.building_user_attributes (
+    building_id INTEGER REFERENCES buildings,
+    user_id UUID REFERENCES users,
+    PRIMARY KEY (building_id, user_id),
+
+    community_like BOOLEAN NOT NULL DEFAULT(FALSE)
+);
+
+CREATE INDEX IF NOT EXISTS user_attrib_building_id_idx ON building_user_attributes (building_id);
+CREATE INDEX IF NOT EXISTS user_attrib_building_id_user_id_idx ON building_user_attributes (building_id, user_id);
+
+
+INSERT INTO building_user_attributes (building_id, user_id, community_like)
+select building_id, user_id, TRUE as community_like
+from building_user_likes;