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Add wikidata service to present wikidata point online.
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88 changes: 88 additions & 0 deletions
88
IsraelHiking.Web/src/application/services/wikidata.service.ts
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| import { HttpClient } from "@angular/common/http"; | ||
| import { Injectable } from "@angular/core"; | ||
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| import { ResourcesService } from "./resources.service"; | ||
| import { firstValueFrom, timeout } from "rxjs"; | ||
| import { GeoJSONUtils } from "./geojson-utils"; | ||
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| type WikiDataPage = { | ||
| sitelinks: { [key: string]: { site: string, title: string } }; | ||
| statements: { [key: string]: { value: { content: any } }[] }; | ||
| } | ||
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| @Injectable() | ||
| export class WikidataService { | ||
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| constructor(private readonly httpClient: HttpClient, | ||
| private readonly resources: ResourcesService) { | ||
| } | ||
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| public async enritchFeatureFromWikimedia(feature: GeoJSON.Feature, language: string): Promise<void> { | ||
| const languageShort = language || this.resources.getCurrentLanguageCodeSimplified(); | ||
| const wikidata = await this.getWikidataFromId(feature.properties.wikidata); | ||
| await this.setDescriptionAndImages(wikidata, feature, languageShort); | ||
| } | ||
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| public async createFeatureFromPageId(wikidataId: string, language: string): Promise<GeoJSON.Feature> { | ||
| const wikidata = await this.getWikidataFromId(wikidataId); | ||
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| const feature: GeoJSON.Feature<GeoJSON.Point> = { | ||
| type: "Feature", | ||
| properties: { | ||
| wikidata: wikidataId, | ||
| poiSource: "Wikidata", | ||
| poiId: "Wikidata_" + wikidataId, | ||
| poiIcon: "icon-wikipedia-w", | ||
| poiCategory: "Wikipedia", | ||
| poiIconColor: "black", | ||
| poiSourceImageUrl: "https://upload.wikimedia.org/wikipedia/commons/thumb/6/6a/Wikidata-logo.svg/128px-Wikidata-logo.svg.png", | ||
| poiLanguage: language | ||
| }, | ||
| geometry: { | ||
| type: "Point", | ||
| coordinates: [] | ||
| } | ||
| }; | ||
| await this.enritchFeatureFromWikimedia(feature, language); | ||
| const lngLat = this.setLocation(wikidata, feature); | ||
| feature.geometry.coordinates = [lngLat.lng, lngLat.lat]; | ||
| feature.properties.name = this.getTitle(wikidata, language); | ||
| return feature; | ||
| } | ||
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| private async getWikidataFromId(wikidataId: string): Promise<WikiDataPage> { | ||
| const url = `https://www.wikidata.org/w/rest.php/wikibase/v0/entities/items/${wikidataId}`; | ||
| return await firstValueFrom(this.httpClient.get(url).pipe(timeout(3000))) as any; | ||
| } | ||
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| private async setDescriptionAndImages(wikidata: WikiDataPage, feature: GeoJSON.Feature, language: string): Promise<void> { | ||
| if (wikidata.statements.P18 && wikidata.statements.P18.length > 0) { | ||
| GeoJSONUtils.setProperty(feature, "image", `File:${wikidata.statements.P18[0].value.content}`); | ||
| } | ||
| const title = this.getTitle(wikidata, language); | ||
| if (title) { | ||
| const indexString = GeoJSONUtils.setProperty(feature, "website", `https://${language}.wikipedia.org/wiki/${title}`); | ||
| feature.properties["poiSourceImageUrl" + indexString] = "https://upload.wikimedia.org/wikipedia/en/thumb/8/80/Wikipedia-logo-v2.svg/128px-Wikipedia-logo-v2.svg.png"; | ||
| } | ||
| const wikipediaPage = await firstValueFrom(this.httpClient.get(`http://${language}.wikipedia.org/w/api.php?format=json&action=query&prop=extracts&exintro=&explaintext=&titles=${title}&origin=*`)) as any; | ||
| const pagesIds = Object.keys(wikipediaPage.query.pages); | ||
| if (pagesIds.length > 0) { | ||
| feature.properties.poiExternalDescription = wikipediaPage.query.pages[pagesIds[0]].extract; | ||
| } | ||
| } | ||
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| private setLocation(wikidata: WikiDataPage, feature: GeoJSON.Feature) { | ||
| const latLng = { lat: 0, lng: 0 }; | ||
| if (wikidata.statements.P625 && wikidata.statements.P625.length > 0) { | ||
| const coordinates = wikidata.statements.P625[0].value.content; | ||
| latLng.lat = coordinates.latitude; | ||
| latLng.lng = coordinates.longitude; | ||
| } | ||
| GeoJSONUtils.setLocation(feature, latLng); | ||
| return latLng; | ||
| } | ||
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| private getTitle(wikidata: WikiDataPage, language: string): string { | ||
| return wikidata.sitelinks[`${language}wiki`]?.title; | ||
| } | ||
| } |