Nw file forgotten

packages/core/src/server/UsedLanguages.ts

@@ -0,0 +1,33 @@
+import { LionWebJsonMetaPointer, LionWebJsonNode, LwJsonUsedLanguage } from "@lionweb/validation"
+
+export function collectUsedLanguages(nodes: LionWebJsonNode[]): LwJsonUsedLanguage[] {
+    if (nodes.length == 0) {
+        return []
+    }
+    const languages: Map<string, Set<string>> = new Map<string, Set<string>>()
+    nodes.forEach(node => {
+        addLanguage(languages, node.classifier)
+        node.properties.forEach(p => addLanguage(languages, p.property))
+        node.containments.forEach(c => addLanguage(languages, c.containment))
+        node.references.forEach(r => addLanguage(languages, r.reference))
+    })
+    const mapped = new Mapped()
+    languages.forEach(mapped.map)
+    return mapped.languages
+}
+
+function addLanguage(languages: Map<string, Set<string>>, metaPointer: LionWebJsonMetaPointer): void {
+    let versions: Set<string> | undefined = languages.get(metaPointer.language)
+    if (versions === undefined) {
+        versions = new Set<string>()
+        languages.set(metaPointer.language, versions)
+    }
+    versions.add(metaPointer.version)
+}
+
+class Mapped {
+    languages: LwJsonUsedLanguage[] = []
+    map = (value: Set<string>, key: string): void => {
+        value.forEach(v => this.languages.push({ key: key, version: v }))
+    }
+}