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Create middleware to fetch named map template

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This commit is contained in:
Daniel García Aubert 2018-01-01 16:54:35 +01:00
parent e3bdeec8ca
commit feae766e62
1 changed files with 88 additions and 84 deletions
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172
lib/cartodb/controllers/named_maps.js
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@ -1,9 +1,20 @@
var NamedMapsCacheEntry = require('../cache/model/named_maps_entry');
const NamedMapsCacheEntry = require('../cache/model/named_maps_entry');
const cors = require('../middleware/cors');
const userMiddleware = require('../middleware/user');
const allowQueryParams = require('../middleware/allow-query-params');
const vectorError = require('../middleware/vector-error');
var cors = require('../middleware/cors');
var userMiddleware = require('../middleware/user');
var allowQueryParams = require('../middleware/allow-query-params');
var vectorError = require('../middleware/vector-error');
const DEFAULT_ZOOM_CENTER = {
zoom: 1,
center: {
lng: 0,
lat: 0
}
};
function numMapper(n) {
return +n;
}
function NamedMapsController(prepareContext, namedMapProviderCache, tileBackend, previewBackend,
surrogateKeysCache, tablesExtentApi, metadataBackend) {
@ -44,6 +55,7 @@ NamedMapsController.prototype.register = function(app) {
this.prepareContext,
this.getNamedMapProvider('STATIC_VIZ_MAP'),
this.getAffectedTables(),
this.getTemplate('STATIC_VIZ_MAP'),
this.prepareLayerFilterFromPreviewLayers('STATIC_VIZ_MAP'),
this.getStaticImageOptions(),
this.getImage('STATIC_VIZ_MAP'),
@ -94,11 +106,9 @@ NamedMapsController.prototype.getAffectedTables = function () {
}.bind(this);
};
NamedMapsController.prototype.prepareLayerFilterFromPreviewLayers = function (label) {
return function prepareLayerFilterFromPreviewLayersMiddleware (req, res, next) {
const { user, namedMapProvider } = res.locals;
const { template_id } = req.params;
const { config, auth_token } = req.query;
NamedMapsController.prototype.getTemplate = function (label) {
return function getTemplateMiddleware (req, res, next) {
const { namedMapProvider } = res.locals;
namedMapProvider.getTemplate((err, template) => {
if (err) {
@ -106,37 +116,49 @@ NamedMapsController.prototype.prepareLayerFilterFromPreviewLayers = function (la
return next(err);
}
if (!template || !template.view || !template.view.preview_layers) {
return next();
res.locals.template = template;
next();
});
};
};
NamedMapsController.prototype.prepareLayerFilterFromPreviewLayers = function (label) {
return function prepareLayerFilterFromPreviewLayersMiddleware (req, res, next) {
const { user, template } = res.locals;
const { template_id } = req.params;
const { config, auth_token } = req.query;
if (!template || !template.view || !template.view.preview_layers) {
return next();
}
var previewLayers = template.view.preview_layers;
var layerVisibilityFilter = [];
template.layergroup.layers.forEach(function (layer, index) {
if (previewLayers[''+index] !== false && previewLayers[layer.id] !== false) {
layerVisibilityFilter.push(''+index);
}
});
if (!layerVisibilityFilter.length) {
return next();
}
// overwrites 'all' default filter
res.locals.layer = layerVisibilityFilter.join(',');
// recreates the provider
this.namedMapProviderCache.get(user, template_id, config, auth_token, res.locals, (err, provider) => {
if (err) {
err.label = label;
return next(err);
}
var previewLayers = template.view.preview_layers;
var layerVisibilityFilter = [];
res.locals.namedMapProvider = provider;
template.layergroup.layers.forEach(function (layer, index) {
if (previewLayers[''+index] !== false && previewLayers[layer.id] !== false) {
layerVisibilityFilter.push(''+index);
}
});
if (!layerVisibilityFilter.length) {
return next();
}
// overwrites 'all' default filter
res.locals.layer = layerVisibilityFilter.join(',');
// recreates the provider
this.namedMapProviderCache.get(user, template_id, config, auth_token, res.locals, (err, provider) => {
if (err) {
err.label = label;
return next(err);
}
res.locals.namedMapProvider = provider;
next();
});
next();
});
}.bind(this);
};
@ -162,21 +184,9 @@ NamedMapsController.prototype.getTile = function () {
}.bind(this);
};
var DEFAULT_ZOOM_CENTER = {
zoom: 1,
center: {
lng: 0,
lat: 0
}
};
function numMapper(n) {
return +n;
}
NamedMapsController.prototype.getStaticImageOptions = function () {
return function getStaticImageOptionsMiddleware(req, res, next) {
const { user, namedMapProvider, zoom, lon, lat, bbox } = res.locals;
const { user, namedMapProvider, template, zoom, lon, lat, bbox } = res.locals;
if ([zoom, lon, lat].map(numMapper).every(Number.isFinite)) {
res.locals.imageOpts = {
@ -206,49 +216,43 @@ NamedMapsController.prototype.getStaticImageOptions = function () {
}
}
namedMapProvider.getTemplate((err, template) => {
if (template.view) {
var zoomCenter = templateZoomCenter(template.view);
if (zoomCenter) {
if (Number.isFinite(+zoom)) {
zoomCenter.zoom = +zoom;
}
res.locals.imageOpts = zoomCenter;
return next();
}
var bounds = templateBounds(template.view);
if (bounds) {
res.locals.imageOpts = bounds;
return next();
}
}
res.locals.imageOpts = DEFAULT_ZOOM_CENTER;
namedMapProvider.getAffectedTablesAndLastUpdatedTime((err, affectedTablesAndLastUpdate) => {
if (err) {
return next(err);
return next();
}
if (template.view) {
var zoomCenter = templateZoomCenter(template.view);
if (zoomCenter) {
if (Number.isFinite(+zoom)) {
zoomCenter.zoom = +zoom;
}
res.locals.imageOpts = zoomCenter;
return next();
}
var affectedTables = affectedTablesAndLastUpdate.tables || [];
var bounds = templateBounds(template.view);
if (bounds) {
res.locals.imageOpts = bounds;
return next();
}
if (affectedTables.length === 0) {
return next();
}
res.locals.imageOpts = DEFAULT_ZOOM_CENTER;
namedMapProvider.getAffectedTablesAndLastUpdatedTime((err, affectedTablesAndLastUpdate) => {
this.tablesExtentApi.getBounds(user, affectedTables, (err, bounds) => {
if (err) {
return next();
}
var affectedTables = affectedTablesAndLastUpdate.tables || [];
if (affectedTables.length === 0) {
return next();
}
this.tablesExtentApi.getBounds(user, affectedTables, (err, bounds) => {
if (err) {
return next();
}
res.locals.imageOpts = bounds;
return next();
});
res.locals.imageOpts = bounds;
return next();
});
});
}.bind(this);