Search feature: refactor, add translations

src/Logic/Search/SearchUtils.ts

@@ -0,0 +1,75 @@
+import Locale from "../../UI/i18n/Locale"
+import { Utils } from "../../Utils"
+import ThemeSearch from "./ThemeSearch"
+
+export default class SearchUtils {
+
+
+    /** Applies special search terms, such as 'studio', 'osmcha', ...
+     * Returns 'false' if nothing is matched.
+     * Doesn't return control flow if a match is found (navigates to another page in this case)
+     */
+    public static applySpecialSearch(searchTerm: string, ) {
+        searchTerm = searchTerm.toLowerCase()
+        if (!searchTerm) {
+            return false
+        }
+        if (searchTerm === "personal") {
+            window.location.href = ThemeSearch.createUrlFor({ id: "personal" }, undefined)
+        }
+        if (searchTerm === "bugs" || searchTerm === "issues") {
+            window.location.href = "https://github.com/pietervdvn/MapComplete/issues"
+        }
+        if (searchTerm === "source") {
+            window.location.href = "https://github.com/pietervdvn/MapComplete"
+        }
+        if (searchTerm === "docs") {
+            window.location.href = "https://github.com/pietervdvn/MapComplete/tree/develop/Docs"
+        }
+        if (searchTerm === "osmcha" || searchTerm === "stats") {
+            window.location.href = Utils.OsmChaLinkFor(7)
+        }
+        if (searchTerm === "studio") {
+            window.location.href = "./studio.html"
+        }
+        return false
+
+    }
+
+
+    /**
+     * Searches for the smallest distance in words; will split both the query and the terms
+     *
+     * SearchUtils.scoreKeywords("drinking water", {"en": ["A layer with drinking water points"]}, "en") // => 0
+     * SearchUtils.scoreKeywords("waste", {"en": ["A layer with drinking water points"]}, "en") // => 2
+     *
+     */
+    public static scoreKeywords(query: string, keywords: Record<string, string[]> | string[], language?: string): number {
+        if(!keywords){
+            return Infinity
+        }
+        language ??= Locale.language.data
+        const queryParts = query.trim().split(" ").map(q => Utils.simplifyStringForSearch(q))
+        let terms: string[]
+        if (Array.isArray(keywords)) {
+            terms = keywords
+        } else {
+            terms = (keywords[language] ?? []).concat(keywords["*"])
+        }
+        const termsAll = Utils.NoNullInplace(terms).flatMap(t => t.split(" "))
+
+        let distanceSummed = 0
+        for (let i = 0; i < queryParts.length; i++) {
+            const q = queryParts[i]
+            let minDistance: number = 99
+            for (const term of termsAll) {
+                const d = Utils.levenshteinDistance(q, Utils.simplifyStringForSearch(term))
+                if (d < minDistance) {
+                    minDistance = d
+                }
+            }
+            distanceSummed += minDistance
+        }
+        return distanceSummed
+    }
+}