112 lines
3.1 KiB
JavaScript
112 lines
3.1 KiB
JavaScript
import express from 'express';
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import { get_bbox, render_tile } from './tile';
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import { strictParseInt } from './parse';
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// tiles router
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const router = express.Router()
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// basic geometry tiles
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router.get('/outline/:z/:x/:y.png', function(req, res) {
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const bbox = get_bbox(req.params)
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const table_def = 'geometries'
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const style_def = ['polygon']
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render_tile(bbox, table_def, style_def, function(err, im) {
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if (err) throw err
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res.writeHead(200, {'Content-Type': 'image/png'})
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res.end(im.encodeSync('png'))
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})
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});
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// highlight single geometry
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router.get('/highlight/:z/:x/:y.png', function(req, res) {
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const { highlight } = req.query
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const geometry_id = strictParseInt(highlight);
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if(isNaN(geometry_id)){
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res.status(400).send({error:'Bad parameter'})
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return
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}
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const bbox = get_bbox(req.params)
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const table_def = `(
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SELECT
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(g.geometry_id = ${geometry_id}) as focus,
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cast(
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b.building_doc->>'location_number'
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as text
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) as location_number,
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g.geometry_geom
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FROM
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geometries as g,
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buildings as b
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WHERE
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g.geometry_id = b.geometry_id
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) as highlight`
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const style_def = ['highlight']
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render_tile(bbox, table_def, style_def, function(err, im) {
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if (err) throw err
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res.writeHead(200, {'Content-Type': 'image/png'})
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res.end(im.encodeSync('png'))
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})
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});
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// date_year choropleth
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router.get('/date_year/:z/:x/:y.png', function(req, res) {
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const bbox = get_bbox(req.params)
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// const table_def = 'geometries'
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const table_def = `(
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SELECT
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cast(
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NULLIF(b.building_doc->>'date_year', '')
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as integer
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) as date_year,
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g.geometry_geom
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FROM
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geometries as g,
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buildings as b
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WHERE
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g.geometry_id = b.geometry_id
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) as outline`
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const style_def = ['date_year']
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render_tile(bbox, table_def, style_def, function(err, im) {
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if (err) throw err
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res.writeHead(200, {'Content-Type': 'image/png'})
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res.end(im.encodeSync('png'))
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})
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});
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// date_year choropleth
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router.get('/size_storeys/:z/:x/:y.png', function(req, res) {
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const bbox = get_bbox(req.params)
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// const table_def = 'geometries'
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const table_def = `(
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SELECT
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cast(
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NULLIF(b.building_doc->>'size_attic', '')
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as integer
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) +
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cast(
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NULLIF(b.building_doc->>'size_core', '')
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as integer
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)
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as size_storeys,
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g.geometry_geom
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FROM
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geometries as g,
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buildings as b
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WHERE
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g.geometry_id = b.geometry_id
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) as outline`
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const style_def = ['size_storeys']
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render_tile(bbox, table_def, style_def, function(err, im) {
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if (err) throw err
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res.writeHead(200, {'Content-Type': 'image/png'})
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res.end(im.encodeSync('png'))
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})
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});
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export default router;
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