Extract fetch functions to utilities (#629)

* do backend

* other files

* move fetch utils to own file

* remove extra line

* add extra line

* remove unnecessary export

* undo changes to cssStyleApplier

1 files changed, 57 insertions, 0 deletions

diff --git a/ext/js/core/fetch-utilities.js b/ext/js/core/fetch-utilities.js
new file mode 100644
index 00000000..074f7c9a
--- /dev/null
+++ b/ext/js/core/fetch-utilities.js
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2024  Yomitan Authors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import {readResponseJson} from './json.js';
+
+/**
+ * @param {string} url
+ * @returns {Promise<Response>}
+ */
+async function fetchAsset(url) {
+    const response = await fetch(chrome.runtime.getURL(url), {
+        method: 'GET',
+        mode: 'no-cors',
+        cache: 'default',
+        credentials: 'omit',
+        redirect: 'follow',
+        referrerPolicy: 'no-referrer'
+    });
+    if (!response.ok) {
+        throw new Error(`Failed to fetch ${url}: ${response.status}`);
+    }
+    return response;
+}
+
+
+/**
+ * @param {string} url
+ * @returns {Promise<string>}
+ */
+export async function fetchText(url) {
+    const response = await fetchAsset(url);
+    return await response.text();
+}
+
+/**
+ * @template [T=unknown]
+ * @param {string} url
+ * @returns {Promise<T>}
+ */
+export async function fetchJson(url) {
+    const response = await fetchAsset(url);
+    return await readResponseJson(response);
+}
\ No newline at end of file