Merge branch 'develop' into feature/data-container-state

app/src/api/controllers/buildingController.ts

@@ -1,147 +1,148 @@
+import express from 'express';
 import * as buildingService from '../services/building';
 import * as userService from '../services/user';
+import asyncController from '../routes/asyncController';
 
 
 // GET buildings
 // not implemented - may be useful to GET all buildings, paginated
 
 // GET buildings at point
-function getBuildingsByLocation(req, res) {
+const getBuildingsByLocation = asyncController(async (req: express.Request, res: express.Response) => {
     const { lng, lat } = req.query;
-    buildingService.queryBuildingsAtPoint(lng, lat).then(function (result) {
+    try {
+        const result = await buildingService.queryBuildingsAtPoint(lng, lat);
         res.send(result);
-    }).catch(function (error) {
+    } catch (error) {
         console.error(error);
-        res.send({ error: 'Database error' })
+        res.send({ error: 'Database error' });
-    })
     }
+});
 
 // GET buildings by reference (UPRN/TOID or other identifier)
-function getBuildingsByReference(req, res) {
+const getBuildingsByReference = asyncController(async (req: express.Request, res: express.Response) => {
     const { key, id } = req.query;
-    buildingService.queryBuildingsByReference(key, id).then(function (result) {
+    try {
+        const result = await buildingService.queryBuildingsByReference(key, id);
         res.send(result);
-    }).catch(function (error) {
+    } catch (error) {
         console.error(error);
-        res.send({ error: 'Database error' })
+        res.send({ error: 'Database error' });
-    })
     }
+});
 
 // GET individual building, POST building updates
-function getBuildingById(req, res) {
+const getBuildingById = asyncController(async (req: express.Request, res: express.Response) => {
     const { building_id } = req.params;
-    buildingService.getBuildingById(building_id).then(function (result) {
+    try {
+        const result = await buildingService.getBuildingById(building_id);
         res.send(result);
-    }).catch(function (error) {
+    } catch(error) {
         console.error(error);
-        res.send({ error: 'Database error' })
+        res.send({ error: 'Database error' });
-    })
     }
+});
 
-function updateBuildingById(req, res) {
+const updateBuildingById = asyncController(async (req: express.Request, res: express.Response) => {
     if (req.session.user_id) {
-        updateBuilding(req, res, req.session.user_id);
+        await updateBuilding(req, res, req.session.user_id);
     } else if (req.query.api_key) {
-        userService.authAPIUser(req.query.api_key)
+        try {
-            .then(function (user) {
+            const user = await userService.authAPIUser(req.query.api_key);
-                updateBuilding(req, res, user.user_id)
+            await updateBuilding(req, res, user.user_id);
-            })
+        } catch(err) {
-            .catch(function (err) {
             console.error(err);
             res.send({ error: 'Must be logged in' });
-            });
+        }
     } else {
         res.send({ error: 'Must be logged in' });
     }
-}
+});
 
-function updateBuilding(req, res, userId) {
+async function updateBuilding(req: express.Request, res: express.Response, userId: string) {
     const { building_id } = req.params;
-    const building = req.body;
+    const buildingUpdate = req.body;
-    buildingService.saveBuilding(building_id, building, userId).then(building => {
+
-        if (building.error) {
+    try {
-            res.send(building)
+        const building = await buildingService.saveBuilding(building_id, buildingUpdate, userId);
-            return
+
-        }
         if (typeof (building) === 'undefined') {
-            res.send({ error: 'Database error' })
+            return res.send({ error: 'Database error' });
-            return
+        }
+        if (building.error) {
+            return res.send(building);
+        }
+        res.send(building);
+    } catch(err) {
+        res.send({ error: 'Database error' });
     }
-        res.send(building)
-    }).catch(
-        () => res.send({ error: 'Database error' })
-    )
 }
 
 // GET building UPRNs
-function getBuildingUPRNsById(req, res) {
+const getBuildingUPRNsById = asyncController(async (req: express.Request, res: express.Response) => {
     const { building_id } = req.params;
-    buildingService.getBuildingUPRNsById(building_id).then(function (result) {
+    try {
+        const result = await buildingService.getBuildingUPRNsById(building_id);
+
         if (typeof (result) === 'undefined') {
-            res.send({ error: 'Database error' })
+            return res.send({ error: 'Database error' });
-            return
         }
-        res.send({
+        res.send({uprns: result});
-            uprns: result
+    } catch(error) {
-        });
-    }).catch(function (error) {
         console.error(error);
-        res.send({ error: 'Database error' })
+        res.send({ error: 'Database error' });
-    })
     }
+});
 
 // GET/POST like building
-function getBuildingLikeById(req, res) {
+const getBuildingLikeById = asyncController(async (req: express.Request, res: express.Response) => {
     if (!req.session.user_id) {
-        res.send({ like: false });  // not logged in, so cannot have liked
+        return res.send({ like: false });  // not logged in, so cannot have liked
-        return
     }
     const { building_id } = req.params;
-    buildingService.getBuildingLikeById(building_id, req.session.user_id).then(like => {
+    try {
+        const like = await buildingService.getBuildingLikeById(building_id, req.session.user_id);
+
         // any value returned means like
-        res.send({ like: like })
+        res.send({ like: like });
-    }).catch(
+    } catch(error) {
-        () => res.send({ error: 'Database error' })
+        res.send({ error: 'Database error' })
-    )
+    }
+});
+
+const updateBuildingLikeById = asyncController(async (req: express.Request, res: express.Response) => {
+    if (!req.session.user_id) {
+        return res.send({ error: 'Must be logged in' });
     }
 
-function updateBuildingLikeById(req, res) {
-    if (!req.session.user_id) {
-        res.send({ error: 'Must be logged in' });
-        return
-    }
     const { building_id } = req.params;
     const { like } = req.body;
-    if (like) {
+
-        buildingService.likeBuilding(building_id, req.session.user_id).then(building => {
+    try {
+        const building = like ?
+            await buildingService.likeBuilding(building_id, req.session.user_id) :
+            await buildingService.unlikeBuilding(building_id, req.session.user_id);
+        
         if (building.error) {
-                res.send(building)
+            return res.send(building);
-                return
         }
         if (typeof (building) === 'undefined') {
-                res.send({ error: 'Database error' })
+            return res.send({ error: 'Database error' });
-                return
         }
-            res.send(building)
+        res.send(building);
-        }).catch(
+    } catch(error) {
-            () => res.send({ error: 'Database error' })
+        res.send({ error: 'Database error' });
-        )
-    } else {
-        buildingService.unlikeBuilding(building_id, req.session.user_id).then(building => {
-            if (building.error) {
-                res.send(building)
-                return
-            }
-            if (typeof (building) === 'undefined') {
-                res.send({ error: 'Database error' })
-                return
-            }
-            res.send(building)
-        }).catch(
-            () => res.send({ error: 'Database error' })
-        )
     }
+});
+
+const getLatestRevisionId = asyncController(async (req: express.Request, res: express.Response) => {
+    try {
+        const revisionId = await buildingService.getLatestRevisionId();
+        res.send({latestRevisionId: revisionId});
+    } catch(error) {
+        res.send({ error: 'Database error' });
     }
+});
 
 export default {
     getBuildingsByLocation,
@@ -150,5 +151,6 @@ export default {
     updateBuildingById,
     getBuildingUPRNsById,
     getBuildingLikeById,
-    updateBuildingLikeById
+    updateBuildingLikeById,
+    getLatestRevisionId
 };

app/src/api/controllers/userController.ts

@@ -8,23 +8,22 @@ import { TokenVerificationError } from '../services/passwordReset';
 import asyncController from '../routes/asyncController';
 import { ValidationError } from '../validation';
 
-function createUser(req, res) {
+const createUser = asyncController(async (req: express.Request, res: express.Response) => {
     const user = req.body;
     if (req.session.user_id) {
-        res.send({ error: 'Already signed in' });
+        return res.send({ error: 'Already signed in' });
-        return;
     }
 
     if (user.email) {
         if (user.email != user.confirm_email) {
-            res.send({ error: 'Email did not match confirmation.' });
+            return res.send({ error: 'Email did not match confirmation.' });
-            return;
         }
     } else {
         user.email = null;
     }
 
-    userService.createUser(user).then(function (result) {
+    try {
+        const result = await userService.createUser(user);
         if (result.user_id) {
             req.session.user_id = result.user_id;
             res.send({ user_id: result.user_id });
@@ -32,39 +31,40 @@ function createUser(req, res) {
             req.session.user_id = undefined;
             res.send({ error: result.error });
         }
-    }).catch(function (err) {
+    } catch(err) {
         console.error(err);
         res.send(err);
-    });
     }
+});
 
-function getCurrentUser(req, res) {
+const getCurrentUser = asyncController(async (req: express.Request, res: express.Response) => {
     if (!req.session.user_id) {
-        res.send({ error: 'Must be logged in' });
+        return res.send({ error: 'Must be logged in' });
-        return;
     }
 
-    userService.getUserById(req.session.user_id).then(function (user) {
+    try {
+        const user = await userService.getUserById(req.session.user_id);
         res.send(user);
-    }).catch(function (error) {
+    } catch(error) {
         res.send(error);
-    });
     }
+});
 
-function deleteCurrentUser(req, res) {
+const deleteCurrentUser = asyncController(async (req: express.Request, res: express.Response) => {
     if (!req.session.user_id) {
         return res.send({ error: 'Must be logged in' });
     }
     console.log(`Deleting user ${req.session.user_id}`);
 
-    userService.deleteUser(req.session.user_id).then(
+    try {
-        () => userService.logout(req.session)
+        await userService.deleteUser(req.session.user_id);
-    ).then(() => {
+        await userService.logout(req.session);
+
         res.send({ success: true });
-    }).catch(err => {
+    } catch(err) {
         res.send({ error: err });
-    });
     }
+});
 
 const resetPassword = asyncController(async function(req: express.Request, res: express.Response) {
     if(req.body == undefined || (req.body.email == undefined && req.body.token == undefined)) {

app/src/api/routes/buildingsRouter.ts

@@ -14,6 +14,8 @@ router.get('/locate', buildingController.getBuildingsByLocation);
 // GET buildings by reference (UPRN/TOID or other identifier)
 router.get('/reference', buildingController.getBuildingsByReference);
 
+router.get('/revision', buildingController.getLatestRevisionId);
+
 router.route('/:building_id.json')
     // GET individual building
     .get(buildingController.getBuildingById)

app/src/api/services/building.ts

@@ -5,6 +5,7 @@
 import db from '../../db';
 import { tileCache } from '../../tiles/rendererDefinition';
 import { BoundingBox } from '../../tiles/types';
+import { ITask } from 'pg-promise';
 
 // 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.
@@ -18,8 +19,22 @@ const serializable = new TransactionMode({
     readOnly: false
 });
 
-function queryBuildingsAtPoint(lng, lat) {
+async function getLatestRevisionId() {
-    return db.manyOrNone(
+    try {
+        const data = await db.oneOrNone(
+            `SELECT MAX(log_id) from logs`
+        );
+        return data == undefined ? undefined : data.max;
+    } catch(err) {
+        console.error(err);
+        return undefined;
+    }
+}
+
+
+async function queryBuildingsAtPoint(lng: number, lat: number) {
+    try {
+        return await db.manyOrNone(
             `SELECT b.*
             FROM buildings as b, geometries as g
             WHERE
@@ -34,15 +49,17 @@ function queryBuildingsAtPoint(lng, lat) {
                 )
             `,
             [lng, lat]
-    ).catch(function (error) {
+        );
+    } catch(error) {
         console.error(error);
         return undefined;
-    });
+    }
 }
 
-function queryBuildingsByReference(key, id) {
+async function queryBuildingsByReference(key: string, ref: string) {
+    try {
         if (key === 'toid') {
-        return db.manyOrNone(
+            return await db.manyOrNone(
                 `SELECT
                     *
                 FROM
@@ -50,14 +67,10 @@ function queryBuildingsByReference(key, id) {
                 WHERE
                     ref_toid = $1
                 `,
-            [id]
+                [ref]
-        ).catch(function (error) {
+            );
-            console.error(error);
+        } else if (key === 'uprn') {
-            return undefined;
+            return await db.manyOrNone(
-        });
-    }
-    if (key === 'uprn') {
-        return db.manyOrNone(
                 `SELECT
                     b.*
                 FROM
@@ -67,90 +80,208 @@ function queryBuildingsByReference(key, id) {
                 AND
                     p.uprn = $1
                 `,
-            [id]
+                [ref]
-        ).catch(function (error) {
+            );
-            console.error(error);
+        } else {
-            return undefined;
+            return { error: 'Key must be UPRN or TOID' };
-        });
+        }
+    } catch(err) {
+        console.error(err);
+        return undefined;
     }
-    return Promise.resolve({ error: 'Key must be UPRN or TOID' });
 }
 
-function getBuildingById(id) {
+async function getBuildingById(id: number) {
-    return db.one(
+    try {
+        const building = await db.one(
             'SELECT * FROM buildings WHERE building_id = $1',
             [id]
-    ).then((building) => {
+        );
-        return getBuildingEditHistory(id).then((edit_history) => {
+
-            building.edit_history = edit_history
+        building.edit_history = await getBuildingEditHistory(id);
-            return building
+
-        })
+        return building;
-    }).catch(function (error) {
+    } catch(error) {
         console.error(error);
         return undefined;
-    });
+    }
 }
 
-function getBuildingEditHistory(id) {
+async function getBuildingEditHistory(id: number) {
-    return db.manyOrNone(
+    try {
+        return await db.manyOrNone(
             `SELECT log_id as revision_id, forward_patch, reverse_patch, date_trunc('minute', log_timestamp), username
             FROM logs, users
             WHERE building_id = $1 AND logs.user_id = users.user_id`,
             [id]
-    ).then((data) => {
+        );
-        return data
+    } catch(error) {
-    }).catch(function (error) {
         console.error(error);
-        return []
+        return [];
-    });
+    }
 }
 
-function getBuildingLikeById(buildingId, userId) {
+async function getBuildingLikeById(buildingId: number, userId: string) {
-    return db.oneOrNone(
+    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]
-    ).then(res => {
+        );
-        return res && res.like
+        return res && res.like;
-    }).catch(function (error) {
+    } catch(error) {
         console.error(error);
         return undefined;
-    });
+    }
 }
 
-function getBuildingUPRNsById(id) {
+async function getBuildingUPRNsById(id: number) {
-    return db.any(
+    try {
+        return await db.any(
             'SELECT uprn, parent_uprn FROM building_properties WHERE building_id = $1',
             [id]
-    ).catch(function (error) {
+        );
+    } catch(error) {
         console.error(error);
         return undefined;
-    });
+    }
 }
 
-function saveBuilding(buildingId, building, userId) {
+async function saveBuilding(buildingId: number, building: any, userId: string) { // TODO add proper building type
+    try {
+        return await updateBuildingData(buildingId, userId, async () => {
             // remove read-only fields from consideration
             delete building.building_id;
             delete building.revision_id;
             delete building.geometry_id;
 
-    // start transaction around save operation
+            // return whitelisted fields to update
-    // - select and compare to identify changeset
+            return pickAttributesToUpdate(building, BUILDING_FIELD_WHITELIST);
-    // - insert changeset
+        });
-    // - update to latest state
+    } catch(error) {
-    // commit or rollback (repeated-read sufficient? or serializable?)
+        console.error(error);
-    return db.tx(t => {
+        return { error: error };
+    }
+}
+
+async function likeBuilding(buildingId: number, userId: string) {
+    try {
+        return await updateBuildingData(
+            buildingId,
+            userId,
+            async (t) => {
+                // return total like count after update
+                return getBuildingLikeCount(buildingId, t);
+            },
+            async (t) => {
+                // insert building-user like
+                await t.none(
+                    'INSERT INTO building_user_likes ( building_id, user_id ) VALUES ($1, $2);',
+                    [buildingId, userId]
+                );
+            },
+        );
+    } catch (error) {
+        console.error(error);
+        if (error.detail && error.detail.includes('already exists')) {
+            // 'already exists' is thrown if user already liked it
+            return { error: 'It looks like you already like that building!' };
+        } else {
+            return undefined;
+        }
+    }
+}
+
+async function unlikeBuilding(buildingId: number, userId: string) {
+    try {
+        return await updateBuildingData(
+            buildingId,
+            userId,
+            async (t) => {
+                // return total like count after update
+                return getBuildingLikeCount(buildingId, t);
+            },
+            async (t) => {
+                // remove building-user like
+                const result = await t.result(
+                    'DELETE FROM building_user_likes WHERE building_id = $1 AND user_id = $2;',
+                    [buildingId, userId]
+                );
+
+                if (result.rowCount === 0) {
+                    throw new Error('No change');
+                }
+            },
+        );
+    } catch(error) {
+        console.error(error);
+        if (error.message === 'No change') {
+            // 'No change' is thrown if user doesn't like this building
+            return { error: 'It looks like you have already revoked your like for that building!' };
+        } else {
+            return undefined;
+        }
+    }
+}
+
+// === Utility functions ===
+
+function pickAttributesToUpdate(obj: any, fieldWhitelist: Set<string>) {
+    const subObject = {};
+    for (let [key, value] of Object.entries(obj)) {
+        if(fieldWhitelist.has(key)) {
+            subObject[key] = value;
+        }
+    }
+    return subObject;
+}
+
+/**
+ * 
+ * @param buildingId ID of the building to count likes for
+ * @param t The database context inside which the count should happen
+ */
+function getBuildingLikeCount(buildingId: number, t: ITask<unknown>) {
     return t.one(
+        'SELECT count(*) as likes_total FROM building_user_likes WHERE building_id = $1;',
+        [buildingId]
+    );
+}
+
+/**
+ * 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)
+ */
+async function updateBuildingData(
+    buildingId: number,
+    userId: string,
+    getUpdateValue: (t: ITask<any>) => Promise<object>,
+    preUpdateDbAction?: (t: ITask<any>) => Promise<void>,
+) {
+    return await db.tx({mode: serializable}, async t => {
+        if (preUpdateDbAction != undefined) {
+            await preUpdateDbAction(t);
+        }
+
+        const update = await getUpdateValue(t);
+
+        const oldBuilding = await t.one(
             'SELECT * FROM buildings WHERE building_id = $1 FOR UPDATE;',
             [buildingId]
-        ).then(oldBuilding => {
+        );
-            const patches = compare(oldBuilding, building, BUILDING_FIELD_WHITELIST);
+
+        console.log(update);
+        const patches = compare(oldBuilding, update);
         console.log('Patching', buildingId, patches)
-            const forward = patches[0];
+        const [forward, reverse] = patches;
-            const reverse = patches[1];
         if (Object.keys(forward).length === 0) {
-                return Promise.reject('No change provided')
+            throw 'No change provided';
         }
-            return t.one(
+
+        const revision = await t.one(
             `INSERT INTO logs (
                         forward_patch, reverse_patch, building_id, user_id
                     ) VALUES (
@@ -158,10 +289,12 @@ function saveBuilding(buildingId, building, userId) {
                     ) RETURNING log_id
                     `,
             [forward, reverse, buildingId, userId]
-            ).then(revision => {
+        );
+
         const sets = db.$config.pgp.helpers.sets(forward);
-                console.log('Setting', buildingId, sets)
+        console.log('Setting', buildingId, sets);
-                return t.one(
+
+        const data = await t.one(
             `UPDATE
                     buildings
                 SET
@@ -173,127 +306,15 @@ function saveBuilding(buildingId, building, userId) {
                     *
                 `,
             [revision.log_id, sets, buildingId]
-                ).then((data) => {
+        );
-                    expireBuildingTileCache(buildingId)
+
-                    return data
+        expireBuildingTileCache(buildingId);
-                })
+
-            });
+        return data;
-        });
-    }).catch(function (error) {
-        console.error(error);
-        return { error: error };
     });
 }
 
-function likeBuilding(buildingId, userId) {
+function privateQueryBuildingBBOX(buildingId: number){
-    // start transaction around save operation
-    // - insert building-user like
-    // - count total likes
-    // - insert changeset
-    // - update building to latest state
-    // commit or rollback (serializable - could be more compact?)
-    return db.tx({mode: serializable}, t => {
-        return t.none(
-            'INSERT INTO building_user_likes ( building_id, user_id ) VALUES ($1, $2);',
-            [buildingId, userId]
-        ).then(() => {
-            return t.one(
-                'SELECT count(*) as likes FROM building_user_likes WHERE building_id = $1;',
-                [buildingId]
-            ).then(building => {
-                return t.one(
-                    `INSERT INTO logs (
-                        forward_patch, building_id, user_id
-                    ) VALUES (
-                        $1:json, $2, $3
-                    ) RETURNING log_id
-                    `,
-                    [{ likes_total: building.likes }, buildingId, userId]
-                ).then(revision => {
-                    return t.one(
-                        `UPDATE buildings
-                        SET
-                            revision_id = $1,
-                            likes_total = $2
-                        WHERE
-                            building_id = $3
-                        RETURNING
-                            *
-                        `,
-                        [revision.log_id, building.likes, buildingId]
-                    ).then((data) => {
-                        expireBuildingTileCache(buildingId)
-                        return data
-                    })
-                })
-            });
-        });
-    }).catch(function (error) {
-        console.error(error);
-        if (error.detail && error.detail.includes('already exists')) {
-            // 'already exists' is thrown if user already liked it
-            return { error: 'It looks like you already like that building!' };
-        } else {
-            return undefined
-        }
-    });
-}
-
-function unlikeBuilding(buildingId, userId) {
-    // start transaction around save operation
-    // - insert building-user like
-    // - count total likes
-    // - insert changeset
-    // - update building to latest state
-    // commit or rollback (serializable - could be more compact?)
-    return db.tx({mode: serializable}, t => {
-        return t.none(
-            'DELETE FROM building_user_likes WHERE building_id = $1 AND user_id = $2;',
-            [buildingId, userId]
-        ).then(() => {
-            return t.one(
-                'SELECT count(*) as likes FROM building_user_likes WHERE building_id = $1;',
-                [buildingId]
-            ).then(building => {
-                return t.one(
-                    `INSERT INTO logs (
-                        forward_patch, building_id, user_id
-                    ) VALUES (
-                        $1:json, $2, $3
-                    ) RETURNING log_id
-                    `,
-                    [{ likes_total: building.likes }, buildingId, userId]
-                ).then(revision => {
-                    return t.one(
-                        `UPDATE buildings
-                        SET
-                            revision_id = $1,
-                            likes_total = $2
-                        WHERE
-                            building_id = $3
-                        RETURNING
-                            *
-                        `,
-                        [revision.log_id, building.likes, buildingId]
-                    ).then((data) => {
-                        expireBuildingTileCache(buildingId)
-                        return data
-                    })
-                })
-            });
-        });
-    }).catch(function (error) {
-        console.error(error);
-        if (error.detail && error.detail.includes('already exists')) {
-            // 'already exists' is thrown if user already liked it
-            return { error: 'It looks like you already like that building!' };
-        } else {
-            return undefined
-        }
-    });
-}
-
-function privateQueryBuildingBBOX(buildingId){
     return db.one(
         `SELECT
             ST_XMin(envelope) as xmin,
@@ -310,14 +331,13 @@ function privateQueryBuildingBBOX(buildingId){
                 b.building_id = $1
         ) as envelope`,
         [buildingId]
-    )
+    );
 }
 
-function expireBuildingTileCache(buildingId) {
+async function expireBuildingTileCache(buildingId: number) {
-    privateQueryBuildingBBOX(buildingId).then((bbox) => {
+    const bbox = await privateQueryBuildingBBOX(buildingId)
     const buildingBbox: BoundingBox = [bbox.xmax, bbox.ymax, bbox.xmin, bbox.ymin];
     tileCache.removeAllAtBbox(buildingBbox);
-    })
 }
 
 const BUILDING_FIELD_WHITELIST = new Set([
@@ -385,16 +405,16 @@ const BUILDING_FIELD_WHITELIST = new Set([
  * @param {Set} whitelist
  * @returns {[object, object]}
  */
-function compare(oldObj, newObj, whitelist) {
+function compare(oldObj: object, newObj: object): [object, object] {
-    const reverse = {}
+    const reverse = {};
-    const forward = {}
+    const forward = {};
     for (const [key, value] of Object.entries(newObj)) {
-        if (oldObj[key] !== value && whitelist.has(key)) {
+        if (oldObj[key] != value) {
             reverse[key] = oldObj[key];
             forward[key] = value;
         }
     }
-    return [forward, reverse]
+    return [forward, reverse];
 }
 
 export {
@@ -405,5 +425,6 @@ export {
     getBuildingUPRNsById,
     saveBuilding,
     likeBuilding,
-    unlikeBuilding
+    unlikeBuilding,
+    getLatestRevisionId
 };

app/src/api/services/user.ts

@@ -6,18 +6,21 @@ import { errors } from 'pg-promise';
 
 import db from '../../db';
 import { validateUsername, ValidationError, validatePassword } from '../validation';
+import { promisify } from 'util';
 
-function createUser(user) {
+
+async function createUser(user) {
     try {
         validateUsername(user.username);
         validatePassword(user.password);
     } catch(err) {
         if (err instanceof ValidationError) {
-            return Promise.reject({ error: err.message });
+            throw { error: err.message };
         } else throw err;
     }
     
-    return db.one(
+    try {
+        return await db.one(
             `INSERT
             INTO users (
                 user_id,
@@ -35,22 +38,24 @@ function createUser(user) {
                 user.email,
                 user.password
             ]
-    ).catch(function (error) {
+        );
-        console.error('Error:', error)
+    } catch(error) {
+        console.error('Error:', error);
 
-        if (error.detail.indexOf('already exists') !== -1) {
+        if (error.detail.includes('already exists')) {
-            if (error.detail.indexOf('username') !== -1) {
+            if (error.detail.includes('username')) {
                 return { error: 'Username already registered' };
-            } else if (error.detail.indexOf('email') !== -1) {
+            } else if (error.detail.includes('email')) {
                 return { error: 'Email already registered' };
             }
         }
-        return { error: 'Database error' }
+        return { error: 'Database error' };
-    });
+    }
 }
 
-function authUser(username, password) {
+async function authUser(username: string, password: string) {
-    return db.one(
+    try {
+        const user = await db.one(
             `SELECT
                 user_id,
                 (
@@ -63,24 +68,26 @@ function authUser(username, password) {
                 username,
                 password
             ]
-    ).then(function (user) {
+        );
+
         if (user && user.auth_ok) {
             return { user_id: user.user_id }
         } else {
             return { error: 'Username or password not recognised' }
         }
-    }).catch(function (err) {
+    } catch(err) {
         if (err instanceof errors.QueryResultError) {
             console.error(`Authentication failed for user ${username}`);
             return { error: 'Username or password not recognised' };
         }
         console.error('Error:', err);
         return { error: 'Database error' }; 
-    })
+    }
 }
 
-function getUserById(id) {
+async function getUserById(id: string) {
-    return db.one(
+    try {
+        return await db.one(
             `SELECT
                 username, email, registered, api_key
             FROM
@@ -90,13 +97,15 @@ function getUserById(id) {
             `, [
                 id
             ]
-    ).catch(function (error) {
+        );
+    } catch(error) {
         console.error('Error:', error)
         return undefined;
-    });
+    }
 }
 
-function getUserByEmail(email: string) {
+async function getUserByEmail(email: string) {
+    try {
         return db.one(
             `SELECT
                 user_id, username, email
@@ -105,13 +114,15 @@ function getUserByEmail(email: string) {
             WHERE
                 email = $1
             `, [email]
-    ).catch(function(error) {
+        );
+    } catch(error) {
         console.error('Error:', error);
         return undefined;
-    });
+    }
 }
 
-function getNewUserAPIKey(id) {
+async function getNewUserAPIKey(id: string) {
+    try{
         return db.one(
             `UPDATE
                 users
@@ -124,14 +135,16 @@ function getNewUserAPIKey(id) {
             `, [
                 id
             ]
-    ).catch(function (error) {
+        );
+    } catch(error) {
         console.error('Error:', error)
         return { error: 'Failed to generate new API key.' };
-    });
+    }
 }
 
-function authAPIUser(key) {
+async function authAPIUser(key: string) {
-    return db.one(
+    try {
+        return await db.one(
             `SELECT
                 user_id
             FROM
@@ -141,14 +154,16 @@ function authAPIUser(key) {
             `, [
                 key
             ]
-    ).catch(function (error) {
+        );
+    } catch(error) {
         console.error('Error:', error)
         return undefined;
-    });
+    }
 }
 
-function deleteUser(id) {
+async function deleteUser(id: string) {
-    return db.none(
+    try {
+        return await db.none(
             `UPDATE users
             SET
                 email = null,
@@ -159,20 +174,17 @@ function deleteUser(id) {
                 deleted_on = now() at time zone 'utc'
             WHERE user_id = $1
             `, [id]
-    ).catch((error) => {
+        );
+    } catch(error) {
         console.error('Error:', error);
         return {error: 'Database error'};
-    });
+    }
 }
 
-function logout(session: Express.Session) {
+function logout(session: Express.Session): Promise<void> {
-    return new Promise((resolve, reject) => {
     session.user_id = undefined;
-        session.destroy(err => {
+
-            if (err) return reject(err);
+    return promisify(session.destroy.bind(session))();
-            return resolve();
-        });
-    });
 }
 
 export {

app/src/client.tsx

@@ -12,7 +12,12 @@ const data = (window as any).__PRELOADED_STATE__; // TODO: remove any
 
 hydrate(
     <BrowserRouter>
-        <App user={data.user} building={data.building} building_like={data.building_like} />
+        <App
+            user={data.user}
+            building={data.building}
+            building_like={data.building_like}
+            revisionId={data.latestRevisionId}
+        />
     </BrowserRouter>,
     document.getElementById('root')
 );

app/src/frontend/app.test.tsx

@@ -9,7 +9,7 @@ describe('<App />', () => {
         const div = document.createElement('div');
         ReactDOM.render(
             <MemoryRouter>
-                <App />
+                <App revisionId={0} />
             </MemoryRouter>,
             div
         );

app/src/frontend/app.tsx

@@ -28,6 +28,7 @@ interface AppProps {
     user?: any;
     building?: any;
     building_like?: boolean;
+    revisionId: number;
 }
 
 /**
@@ -49,6 +50,8 @@ class App extends React.Component<AppProps, any> { // TODO: add proper types
         building_like: PropTypes.bool
     };
 
+    static mapAppPaths = ['/', '/:mode(view|edit|multi-edit)/:category/:building(\\d+)?'];
+
     constructor(props: Readonly<AppProps>) {
         super(props);
         
@@ -79,7 +82,14 @@ class App extends React.Component<AppProps, any> { // TODO: add proper types
     render() {
         return (
             <Fragment>
-            <Header user={this.state.user} />
+            <Switch>
+                <Route exact path={App.mapAppPaths}>
+                    <Header user={this.state.user} animateLogo={false} />
+                </Route>
+                <Route>
+                    <Header user={this.state.user} animateLogo={true} />
+                </Route>
+            </Switch>
             <main>
             <Switch>
                 <Route exact path="/about.html" component={AboutPage} />
@@ -105,12 +115,13 @@ class App extends React.Component<AppProps, any> { // TODO: add proper types
                 <Route exact path="/data-accuracy.html" component={DataAccuracyPage} />
                 <Route exact path="/data-extracts.html" component={DataExtracts} />
                 <Route exact path="/contact.html" component={ContactPage} />
-                <Route exact path={["/", "/:mode(view|edit|multi-edit)/:category?/:building(\\d+)?"]} render={(props) => (
+                <Route exact path={App.mapAppPaths} render={(props) => (
                     <MapApp
                         {...props}
                         building={this.props.building}
                         building_like={this.props.building_like}
                         user={this.state.user}
+                        revisionId={this.props.revisionId}
                     />
                 )} />
                 <Route component={NotFound} />

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

@@ -114,22 +114,6 @@ const SizeView: React.FunctionComponent<CategoryViewProps> = (props) => (
             step={0.1}
             disabled={true}
             />
-        <SelectDataEntry
-            title="Configuration (semi/detached, end/terrace)"
-            slug="size_configuration"
-            value={props.building.size_configuration}
-            mode={props.mode}
-            copy={props.copy}
-            onChange={props.onChange}
-            disabled={true}
-            options={[
-                "Detached",
-                "Semi-detached",
-                "Terrace",
-                "End terrace",
-                "Block"
-            ]}
-            />
         <SelectDataEntry
             title="Roof shape"
             slug="size_roof_shape"

app/src/frontend/components/logo.tsx

@@ -26,22 +26,22 @@ const Logo: React.FunctionComponent<LogoProps> = (props) => {
 const LogoGrid: React.FunctionComponent = () => (
     <div className="grid">
         <div className="row">
-            <div className="cell"></div>
+            <div className="cell background-location"></div>
-            <div className="cell"></div>
+            <div className="cell background-use"></div>
-            <div className="cell"></div>
+            <div className="cell background-type"></div>
-            <div className="cell"></div>
+            <div className="cell background-age"></div>
         </div>
         <div className="row">
-            <div className="cell"></div>
+            <div className="cell background-size"></div>
-            <div className="cell"></div>
+            <div className="cell background-construction"></div>
-            <div className="cell"></div>
+            <div className="cell background-streetscape"></div>
-            <div className="cell"></div>
+            <div className="cell background-team"></div>
         </div>
         <div className="row">
-            <div className="cell"></div>
+            <div className="cell background-sustainability"></div>
-            <div className="cell"></div>
+            <div className="cell background-community"></div>
-            <div className="cell"></div>
+            <div className="cell background-planning"></div>
-            <div className="cell"></div>
+            <div className="cell background-like"></div>
         </div>
     </div>
 )

app/src/frontend/header.tsx

@@ -5,14 +5,25 @@ import PropTypes from 'prop-types';
 import { Logo } from './components/logo';
 import './header.css';
 
+
+interface HeaderProps {
+    user: any;
+    animateLogo: boolean;
+}
+
+interface HeaderState {
+    collapseMenu: boolean;
+}
+
 /**
  * Render the main header using a responsive design
  */
-class Header extends React.Component<any, any> { // TODO: add proper types
+class Header extends React.Component<HeaderProps, HeaderState> { // TODO: add proper types
     static propTypes = { // TODO: generate propTypes from TS
         user: PropTypes.shape({
             username: PropTypes.string
-        })
+        }),
+        animateLogo: PropTypes.bool
     };
 
     constructor(props) {
@@ -40,7 +51,7 @@ class Header extends React.Component<any, any> { // TODO: add proper types
                 <nav className="navbar navbar-light navbar-expand-lg">
                     <span className="navbar-brand align-self-start">
                         <NavLink to="/">
-                            <Logo variant='animated'/>
+                            <Logo variant={this.props.animateLogo ? 'animated' : 'default'}/>
                         </NavLink>
                     </span>
                     <button className="navbar-toggler navbar-toggler-right" type="button"

app/src/frontend/map-app.tsx

@@ -21,6 +21,7 @@ interface MapAppProps extends RouteComponentProps<MapAppRouteParams> {
     building: Building;
     building_like: boolean;
     user: any;
+    revisionId: number;
 }
 
 interface MapAppState {
@@ -41,12 +42,9 @@ class MapApp extends React.Component<MapAppProps, MapAppState> {
     constructor(props: Readonly<MapAppProps>) {
         super(props);
 
-        // set building revision id, default 0
-        const rev = props.building != undefined ? +props.building.revision_id : 0;
-
         this.state = {
             category: this.getCategory(props.match.params.category),
-            revision_id: rev,
+            revision_id: props.revisionId || 0,
             building: props.building,
             building_like: props.building_like
         };
@@ -63,6 +61,27 @@ class MapApp extends React.Component<MapAppProps, MapAppState> {
         }
     }
 
+    componentDidMount() {
+        this.fetchLatestRevision();
+    }
+
+    async fetchLatestRevision() {
+        try {
+            const res = await fetch(`/api/buildings/revision`, {
+                method: 'GET',
+                headers: {
+                    'Content-Type': 'application/json'
+                },
+                credentials: 'same-origin'
+            });
+            const data = await res.json();
+            
+            this.increaseRevision(data.latestRevisionId);
+        } catch(error) {
+            console.error(error);
+        }
+    }
+
     getCategory(category: string) {
         if (category === 'categories') return undefined;
 

app/src/frontend/map/map.tsx

@@ -1,14 +1,13 @@
-import { LatLngExpression } from 'leaflet';
 import PropTypes from 'prop-types';
 import React, { Component, Fragment } from 'react';
-import { Map, TileLayer, ZoomControl, AttributionControl } from 'react-leaflet-universal';
+import { Map, TileLayer, ZoomControl, AttributionControl, GeoJSON } from 'react-leaflet-universal';
+import { GeoJsonObject } from 'geojson';
 
 import '../../../node_modules/leaflet/dist/leaflet.css'
 import './map.css'
 
 import { HelpIcon } from '../components/icons';
 import Legend from './legend';
-import { parseCategoryURL } from '../../parse';
 import SearchBox from './search-box';
 import ThemeSwitcher from './theme-switcher';
 import { Building } from '../models/building';
@@ -29,6 +28,7 @@ interface ColouringMapState {
     lat: number;
     lng: number;
     zoom: number;
+    boundary: GeoJsonObject;
 }
 /**
  * Map area
@@ -49,7 +49,8 @@ class ColouringMap extends Component<ColouringMapProps, ColouringMapState> {
             theme: 'night',
             lat: 51.5245255,
             lng: -0.1338422,
-            zoom: 16
+            zoom: 16,
+            boundary: undefined,
         };
         this.handleClick = this.handleClick.bind(this);
         this.handleLocate = this.handleLocate.bind(this);
@@ -101,8 +102,20 @@ class ColouringMap extends Component<ColouringMapProps, ColouringMapState> {
         this.setState({theme: newTheme});
     }
 
+    async getBoundary() {
+        const res = await fetch('/geometries/boundary-detailed.geojson');
+        const data = await res.json() as GeoJsonObject;
+        this.setState({
+            boundary: data
+        });
+    }
+
+    componentDidMount() {
+        this.getBoundary();
+    }
+
     render() {
-        const position: LatLngExpression = [this.state.lat, this.state.lng];
+        const position: [number, number] = [this.state.lat, this.state.lng];
 
         // baselayer
         const key = OS_API_KEY;
@@ -118,6 +131,11 @@ class ColouringMap extends Component<ColouringMapProps, ColouringMapState> {
         const buildingsBaseUrl = `/tiles/base_${this.state.theme}/{z}/{x}/{y}{r}.png`;
         const buildingBaseLayer = <TileLayer url={buildingsBaseUrl} minZoom={14} />;
 
+
+        const boundaryStyleFn = () => ({color: '#bbb', fill: false});
+        const boundaryLayer = this.state.boundary && 
+                <GeoJSON data={this.state.boundary} style={boundaryStyleFn}/>;
+
         // colour-data tiles
         const cat = this.props.category;
         const tilesetByCat = {
@@ -167,6 +185,7 @@ class ColouringMap extends Component<ColouringMapProps, ColouringMapState> {
                 >
                     { baseLayer }
                     { buildingBaseLayer }
+                    { boundaryLayer }
                     { dataLayer }
                     { highlightLayer }
                     <ZoomControl position="topright" />

app/src/frontend/styles/colours.css

@@ -57,38 +57,38 @@
  * Category colours
  */
 .background-location {
-    background-color: #edc40b;
+    background-color: #f7c625;
 }
 .background-use {
-    background-color: #f0ee0c;
+    background-color: #f7ec25;
 }
 .background-type {
-    background-color: #ff9100;
+    background-color: #f77d11;
 }
 .background-age {
-    background-color: #ee5f63;
+    background-color: #ff6161;
 }
 .background-size {
-    background-color: #ee91bf;
+    background-color: #f2a2b9;
 }
 .background-construction {
-    background-color: #aa7fa7;
+    background-color: #ab8fb0;
 }
 .background-streetscape {
-    background-color: #6f879c;
+    background-color: #718899;
 }
 .background-team {
-    background-color: #5ec232;
+    background-color: #7cbf39;
 }
 .background-sustainability {
-    background-color: #6dbb8b;
+    background-color: #57c28e;
 }
 .background-community {
-    background-color: #65b7ff;
+    background-color: #6bb1e3;
 }
 .background-planning {
-    background-color: #a1a3a9;
+    background-color: #aaaaaa;
 }
 .background-like {
-    background-color: #9c896d;
+    background-color: #a3916f;
 }

app/src/frontendRoute.tsx

@@ -12,7 +12,8 @@ import { getUserById } from './api/services/user';
 import {
     getBuildingById,
     getBuildingLikeById,
-    getBuildingUPRNsById
+    getBuildingUPRNsById,
+    getLatestRevisionId
 } from './api/services/building';
 
 
@@ -36,8 +37,9 @@ function frontendRoute(req: express.Request, res: express.Response) {
         userId ? getUserById(userId) : undefined,
         isBuilding ? getBuildingById(buildingId) : undefined,
         isBuilding ? getBuildingUPRNsById(buildingId) : undefined,
-        (isBuilding && userId) ? getBuildingLikeById(buildingId, userId) : false
+        (isBuilding && userId) ? getBuildingLikeById(buildingId, userId) : false,
-    ]).then(function ([user, building, uprns, buildingLike]) {
+        getLatestRevisionId()
+    ]).then(function ([user, building, uprns, buildingLike, latestRevisionId]) {
         if (isBuilding && typeof (building) === 'undefined') {
             context.status = 404;
         }
@@ -47,12 +49,14 @@ function frontendRoute(req: express.Request, res: express.Response) {
         if (data.building != null) {
             data.building.uprns = uprns;
         }
+        data.latestRevisionId = latestRevisionId;
         renderHTML(context, data, req, res);
     }).catch(error => {
         console.error(error);
         data.user = undefined;
         data.building = undefined;
         data.building_like = undefined;
+        data.latestRevisionId = 0;
         context.status = 500;
         renderHTML(context, data, req, res);
     });
@@ -61,7 +65,12 @@ function frontendRoute(req: express.Request, res: express.Response) {
 function renderHTML(context, data, req, res) {
     const markup = renderToString(
         <StaticRouter context={context} location={req.url}>
-            <App user={data.user} building={data.building} building_like={data.building_like} />
+            <App
+                user={data.user}
+                building={data.building}
+                building_like={data.building_like}
+                revisionId={data.latestRevisionId}
+            />
         </StaticRouter>
     );