mapcomplete/Logic/ImageSearcher.ts
Pieter Vander Vennet ab2e9425c2 Mapillary bugfix
2020-10-27 14:13:37 +01:00

166 lines
No EOL
6.1 KiB
TypeScript

import {WikimediaImage} from "../UI/Image/WikimediaImage";
import {SimpleImageElement} from "../UI/Image/SimpleImageElement";
import {UIElement} from "../UI/UIElement";
import {ImgurImage} from "../UI/Image/ImgurImage";
import {ImagesInCategory, Wikidata, Wikimedia} from "./Web/Wikimedia";
import {UIEventSource} from "./UIEventSource";
import {MapillaryImage} from "../UI/Image/MapillaryImage";
/**
* There are multiple way to fetch images for an object
* 1) There is an image tag
* 2) There is an image tag, the image tag contains multiple ';'-seperated URLS
* 3) there are multiple image tags, e.g. 'image', 'image:0', 'image:1', and 'image_0', 'image_1' - however, these are pretty rare so we are gonna ignore them
* 4) There is a wikimedia_commons-tag, which either has a 'File': or a 'category:' containing images
* 5) There is a wikidata-tag, and the wikidata item either has an 'image' attribute or has 'a link to a wikimedia commons category'
* 6) There is a wikipedia article, from which we can deduct the wikidata item
*
* For some images, author and license should be shown
*/
/**
* Class which search for all the possible locations for images and which builds a list of UI-elements for it.
* Note that this list is embedded into an UIEVentSource, ready to put it into a carousel
*/
export class ImageSearcher extends UIEventSource<{key: string, url: string}[]> {
private readonly _tags: UIEventSource<any>;
private readonly _wdItem = new UIEventSource<string>("");
private readonly _commons = new UIEventSource<string>("");
constructor(tags: UIEventSource<any>, imagePrefix = "image", loadSpecial = true) {
super([]);
this._tags = tags;
const self = this;
// By wrapping this in a UIEventSource, we prevent multiple queries of loadWikiData
this._wdItem.addCallback(() => self.loadWikidata());
this._commons.addCallback(() => self.LoadCommons());
this._tags.addCallbackAndRun(() => self.LoadImages(imagePrefix, loadSpecial));
}
private AddImage(key: string, url: string) {
if (url === undefined || url === null || url === "") {
return;
}
for (const el of this.data) {
if (el.url === url) {
// This url is already seen -> don't add it
return;
}
}
this.data.push({key: key, url: url});
this.ping();
}
private loadWikidata() {
// Load the wikidata item, then detect usage on 'commons'
let allWikidataId = this._wdItem.data.split(";");
for (let wikidataId of allWikidataId) {
// @ts-ignore
if (wikidataId.startsWith("Q")) {
wikidataId = wikidataId.substr(1);
}
Wikimedia.GetWikiData(parseInt(wikidataId), (wd: Wikidata) => {
this.AddImage(undefined, wd.image);
Wikimedia.GetCategoryFiles(wd.commonsWiki, (images: ImagesInCategory) => {
for (const image of images.images) {
// @ts-ignore
if (image.startsWith("File:")) {
this.AddImage(undefined, image);
}
}
})
})
}
}
private LoadCommons() {
const allCommons: string[] = this._commons.data.split(";");
for (const commons of allCommons) {
// @ts-ignore
if (commons.startsWith("Category:")) {
Wikimedia.GetCategoryFiles(commons, (images: ImagesInCategory) => {
for (const image of images.images) {
// @ts-ignore
if (image.startsWith("File:")) {
this.AddImage(undefined, image);
}
}
})
} else { // @ts-ignore
if (commons.startsWith("File:")) {
this.AddImage(undefined, commons);
}
}
}
}
private LoadImages(imagePrefix: string, loadAdditional: boolean): void {
const imageTag = this._tags.data[imagePrefix];
if (imageTag !== undefined) {
const bareImages = imageTag.split(";");
for (const bareImage of bareImages) {
this.AddImage(imagePrefix, bareImage);
}
}
for (const key in this._tags.data) {
if (key.startsWith(imagePrefix+":")) {
const url = this._tags.data[key]
this.AddImage(key, url);
}
}
if (loadAdditional) {
const wdItem = this._tags.data.wikidata;
if (wdItem !== undefined) {
this._wdItem.setData(wdItem);
}
const commons = this._tags.data.wikimedia_commons;
if (commons !== undefined) {
this._commons.setData(commons);
}
if (this._tags.data.mapillary) {
let mapillary = this._tags.data.mapillary;
const prefix = "https://www.mapillary.com/map/im/";
if(mapillary.indexOf(prefix) < 0){
mapillary = prefix + mapillary;
}
this.AddImage(undefined, mapillary)
}
}
}
/***
* Creates either a 'simpleimage' or a 'wikimediaimage' based on the string
* @param url
* @constructor
*/
static CreateImageElement(url: string): UIElement {
// @ts-ignore
if (url.startsWith("File:")) {
return new WikimediaImage(url);
} else if (url.toLowerCase().startsWith("https://commons.wikimedia.org/wiki/")) {
const commons = url.substr("https://commons.wikimedia.org/wiki/".length);
return new WikimediaImage(commons);
} else if (url.toLowerCase().startsWith("https://i.imgur.com/")) {
return new ImgurImage(url);
} else if (url.toLowerCase().startsWith("https://www.mapillary.com/map/im/")) {
return new MapillaryImage(url);
} else {
return new SimpleImageElement(new UIEventSource<string>(url));
}
}
}