feat(version): versions

2 files changed, 198 insertions, 0 deletions

diff --git a/src/templates/assets/javascripts/integrations/search/worker/main/.eslintrc b/src/templates/assets/javascripts/integrations/search/worker/main/.eslintrc
new file mode 100644
index 00000000..3df9d551
--- /dev/null
+++ b/src/templates/assets/javascripts/integrations/search/worker/main/.eslintrc
@@ -0,0 +1,6 @@
+{
+  "rules": {
+    "no-console": "off",
+    "@typescript-eslint/no-misused-promises": "off"
+  }
+}
diff --git a/src/templates/assets/javascripts/integrations/search/worker/main/index.ts b/src/templates/assets/javascripts/integrations/search/worker/main/index.ts
new file mode 100644
index 00000000..2df38080
--- /dev/null
+++ b/src/templates/assets/javascripts/integrations/search/worker/main/index.ts
@@ -0,0 +1,192 @@
+/*
+ * Copyright (c) 2016-2023 Martin Donath <martin.donath@squidfunk.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A RTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+import lunr from "lunr"
+
+import { getElement } from "~/browser/element/_"
+import "~/polyfills"
+
+import { Search } from "../../_"
+import { SearchConfig } from "../../config"
+import {
+  SearchMessage,
+  SearchMessageType
+} from "../message"
+
+/* ----------------------------------------------------------------------------
+ * Types
+ * ------------------------------------------------------------------------- */
+
+/**
+ * Add support for `iframe-worker` shim
+ *
+ * While `importScripts` is synchronous when executed inside of a web worker,
+ * it's not possible to provide a synchronous shim implementation. The cool
+ * thing is that awaiting a non-Promise will convert it into a Promise, so
+ * extending the type definition to return a `Promise` shouldn't break anything.
+ *
+ * @see https://bit.ly/2PjDnXi - GitHub comment
+ *
+ * @param urls - Scripts to load
+ *
+ * @returns Promise resolving with no result
+ */
+declare global {
+  function importScripts(...urls: string[]): Promise<void> | void
+}
+
+/* ----------------------------------------------------------------------------
+ * Data
+ * ------------------------------------------------------------------------- */
+
+/**
+ * Search index
+ */
+let index: Search
+
+/* ----------------------------------------------------------------------------
+ * Helper functions
+ * ------------------------------------------------------------------------- */
+
+/**
+ * Fetch (= import) multi-language support through `lunr-languages`
+ *
+ * This function automatically imports the stemmers necessary to process the
+ * languages which are defined as part of the search configuration.
+ *
+ * If the worker runs inside of an `iframe` (when using `iframe-worker` as
+ * a shim), the base URL for the stemmers to be loaded must be determined by
+ * searching for the first `script` element with a `src` attribute, which will
+ * contain the contents of this script.
+ *
+ * @param config - Search configuration
+ *
+ * @returns Promise resolving with no result
+ */
+async function setupSearchLanguages(
+  config: SearchConfig
+): Promise<void> {
+  let base = "../lunr"
+
+  /* Detect `iframe-worker` and fix base URL */
+  if (typeof parent !== "undefined" && "IFrameWorker" in parent) {
+    const worker = getElement<HTMLScriptElement>("script[src]")!
+    const [path] = worker.src.split("/worker")
+
+    /* Prefix base with path */
+    base = base.replace("..", path)
+  }
+
+  /* Add scripts for languages */
+  const scripts = []
+  for (const lang of config.lang) {
+    switch (lang) {
+
+      /* Add segmenter for Japanese */
+      case "ja":
+        scripts.push(`${base}/tinyseg.js`)
+        break
+
+      /* Add segmenter for Hindi and Thai */
+      case "hi":
+      case "th":
+        scripts.push(`${base}/wordcut.js`)
+        break
+    }
+
+    /* Add language support */
+    if (lang !== "en")
+      scripts.push(`${base}/min/lunr.${lang}.min.js`)
+  }
+
+  /* Add multi-language support */
+  if (config.lang.length > 1)
+    scripts.push(`${base}/min/lunr.multi.min.js`)
+
+  /* Load scripts synchronously */
+  if (scripts.length)
+    await importScripts(
+      `${base}/min/lunr.stemmer.support.min.js`,
+      ...scripts
+    )
+}
+
+/* ----------------------------------------------------------------------------
+ * Functions
+ * ------------------------------------------------------------------------- */
+
+/**
+ * Message handler
+ *
+ * @param message - Source message
+ *
+ * @returns Target message
+ */
+export async function handler(
+  message: SearchMessage
+): Promise<SearchMessage> {
+  switch (message.type) {
+
+    /* Search setup message */
+    case SearchMessageType.SETUP:
+      await setupSearchLanguages(message.data.config)
+      index = new Search(message.data)
+      return {
+        type: SearchMessageType.READY
+      }
+
+    /* Search query message */
+    case SearchMessageType.QUERY:
+      const query = message.data
+      try {
+        return {
+          type: SearchMessageType.RESULT,
+          data: index.search(query)
+        }
+
+      /* Return empty result in case of error */
+      } catch (err) {
+        console.warn(`Invalid query: ${query} – see https://bit.ly/2s3ChXG`)
+        console.warn(err)
+        return {
+          type: SearchMessageType.RESULT,
+          data: { items: [] }
+        }
+      }
+
+    /* All other messages */
+    default:
+      throw new TypeError("Invalid message type")
+  }
+}
+
+/* ----------------------------------------------------------------------------
+ * Worker
+ * ------------------------------------------------------------------------- */
+
+/* Expose Lunr.js in global scope, or stemmers won't work */
+self.lunr = lunr
+
+/* Handle messages */
+addEventListener("message", async ev => {
+  postMessage(await handler(ev.data))
+})