Initial commit: 11ty website with Fire/Frost branding

node_modules/bcp-47/lib/stringify.js

@@ -0,0 +1,50 @@
+/**
+ * @typedef {Partial<import('./parse.js').Schema>} Schema
+ * @typedef {Partial<import('./parse.js').Extension>} Extension
+ */
+
+/**
+ * Compile a language schema to a BCP 47 language tag.
+ *
+ * @param {Schema} schema
+ * @returns {string}
+ */
+export function stringify(schema = {}) {
+  /** @type {Array<string>} */
+  let result = []
+
+  if (schema.irregular) {
+    return schema.irregular
+  }
+
+  if (schema.regular) {
+    return schema.regular
+  }
+
+  if (schema.language) {
+    result = result.concat(
+      schema.language,
+      schema.extendedLanguageSubtags || [],
+      schema.script || [],
+      schema.region || [],
+      schema.variants || []
+    )
+
+    const values = schema.extensions || []
+    let index = -1
+
+    while (++index < values.length) {
+      const value = values[index]
+
+      if (value.singleton && value.extensions && value.extensions.length > 0) {
+        result.push(value.singleton, ...value.extensions)
+      }
+    }
+  }
+
+  if (schema.privateuse && schema.privateuse.length > 0) {
+    result.push('x', ...schema.privateuse)
+  }
+
+  return result.join('-')
+}