Base de carte et de recherche de lieu
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229
js/places.js
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229
js/places.js
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import lunr from "./lib/lunr/lunr.js"
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import lunrStemmer from "./lib/lunr/lunr.stemmer.support.js"
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import lunrFr from "./lib/lunr/lunr.fr.js"
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lunrStemmer(lunr)
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lunrFr(lunr)
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const FEATURE_I = Symbol("Feature index")
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export const FEATURE_ID = Symbol("Feature id")
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/**
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* Base de données locale des différents endroits du lieu
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*/
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export class PlaceDatabase extends EventTarget {
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featuresById = {}
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fullTextIndex = null
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/**
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* Résultats d'une recherche dans la base de données
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* @typedef {Object} SearchResult
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* @property {number} score Score de match avec la requète (le plus haut est le plus proche)
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* @property {Object} feature Feature GeoJSON
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* @property {string} ref Id de la feature GeoJSON
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*/
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/**
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* Rechercher un emplacement
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* @param {string} query Requète textuelle
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* @returns {SearchResult[]} Résultat de la recherche ordonnée par score (le plus haut en premier)
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*/
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search(query){
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if(!this.fullTextIndex){
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throw new Error("Full text index not built, please run \"buildIndex()\" function")
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}
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let raw_result = this.fullTextIndex.search(`${query}^10 ${query}*^2 *${query}*`)
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return raw_result.map(it => ({ score: it.score, feature: this.getFeatureById(it.ref), ref: it.ref }))
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}
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/**
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* Obtenir une feature à partir de son identifiant
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* @param {string} id Identifiant de la feature
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* @returns {Object|undefined} la feature ou undefined si elle n'a pas été trouvée
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*/
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getFeatureById(id){
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return this.featuresById[id]
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}
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/**
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* Options de chargement des données GeoJSON
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* @typedef {Object} AddFeatureOptions
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* @property {boolean|undefined} batch Activer le mode "batch" qui se content de charger de d'ajouter les données sans reconstruire les index. Il faudra appeler "buildIndex()" pour reconstruire les index.
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* @property {string|undefined} idPrefix Prefix des identifiants de feature
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*/
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/**
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* Charger et ajouter des données GeoJSON
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* @param {URL|string} url L'URL d'où doivent être chargées les données
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* @param {AddFeatureOptions} options Options de chargement des données
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* @returns {string[]} ids of added features
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*/
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async loadGeojson(url, options){
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let res = await fetch(url)
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if(!res.ok)
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throw new Error(`Fail to load data from ${url}: server responded with status ${res.status} ${res.statusText}`)
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let content = await res.json()
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return this.addFeature(content, options)
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}
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/**
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* @event NewFeatureEvent
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* @type {Event}
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* @property {"newfeature"} type
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* @property {string} ref Identifiant de la feature qui vient d'être ajoutée
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* @property {object} feature Object GeoJSON de la feature
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*/
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/**
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* Ajouter un object GeoJSON a la base de données
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*
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* Si vous voulez charger des données depuis une URL, utilisez "loadGeojson"
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* @see loadGeojson
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*
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* @fires NewFeatureEvent Quand une nouvelle feature est ajoutée à la base de données
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*
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* @param {Object} geojson Object GeoJSON à ajouter
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* @param {AddFeatureOptions} options Options d'importation
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* @returns {string[]} ids of added features
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*/
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addFeature(geojson, options){
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let idPrefix = options.idPrefix || ""
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let all_ids = []
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if(geojson.type == "Feature"){
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let featureId = geojson?.properties?.id || geojson?.properties?.[FEATURE_I]
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let full_id = idPrefix+"#"+featureId
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if(this.featuresById[full_id]){
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console.warn(`Warning: a feature with ID "${full_id}" already exists in database`)
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}
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geojson[FEATURE_ID] = full_id
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this.featuresById[full_id] = geojson
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let event = new Event("newfeature")
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event.ref = full_id
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event.feature = geojson
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this.dispatchEvent(event)
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all_ids.push(full_id)
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} else if(geojson.type == "FeatureCollection") {
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if(geojson.name){
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idPrefix += (idPrefix != "" ? "-" : "")+geojson.name
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}
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if(geojson?.properties?.[FEATURE_I]){
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idPrefix += (idPrefix != "" ? "-" : "")+geojson.properties[FEATURE_I]
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}
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for(let [i, feature] of Object.entries(geojson.features)){
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feature.properties = {
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...(feature.properties || {}),
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[FEATURE_I]: i
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}
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let id = this.addFeature(feature, {
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...(options || {}),
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batch: true,
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idPrefix: idPrefix
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})
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all_ids.push(id)
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}
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} else {
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throw new Error(`Unsupported GsoJSON feature of type "${geojson.type}"`)
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}
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if(options.batch !== false){
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this.buildIndex()
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}
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return all_ids
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}
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/**
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* Construire l'index de recherche
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* @fires "indexbuild" Quand l'index vient d'être (re)construit
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*/
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buildIndex(){
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let database = this;
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this.fullTextIndex = lunr(function(){
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this.ref("id")
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this.field("name")
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this.field("synonyms")
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for(let [id, feature] of Object.entries(database.featuresById)){
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let synonyms = ""
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if(feature.properties["n couchage"] > 0){
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synonyms += SLEEPING_SYNONYMS.join(" ")
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}
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if(feature.properties["toilettes"]){
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synonyms += " "+TOILETTES_SYNONYMS.join(" ")
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}
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this.add({
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id,
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name: feature.properties.name,
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synonyms
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})
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}
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})
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this.dispatchEvent(new Event("indexbuild"))
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}
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static async createDefault(){
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let default_database = new PlaceDatabase()
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await Promise.all([
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default_database.loadGeojson(new URL("../couches/batiments.geojson", import.meta.url), {batch: true}),
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default_database.loadGeojson(new URL("../couches/piscine.geojson", import.meta.url), {batch: true}),
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default_database.loadGeojson(new URL("../couches/terrain-de-basket.geojson", import.meta.url), {batch: true}),
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default_database.loadGeojson(new URL("../couches/pieces-batiments.geojson", import.meta.url), {batch: true}),
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default_database.loadGeojson(new URL("../couches/camping.geojson", import.meta.url), {batch: true}),
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])
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default_database.buildIndex()
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return default_database
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}
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}
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const SLEEPING_SYNONYMS = [
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"dodo",
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"dortoir",
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"mimir",
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"dormir",
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"lit"
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]
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const TOILETTES_SYNONYMS = [
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"caca",
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"pipi",
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"cabinets",
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"water-closet",
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"latrines",
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"🚽",
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"double véssé",
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"chaise percée",
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"WC",
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"waters",
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"toilettes",
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"toilette",
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"chiotte",
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"chiottes",
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"le trône",
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"le trones",
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"pièce mystère",
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"backroom",
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"retailleau"
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]
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