File size: 6,263 Bytes
4d7e26e 8554abc 4d7e26e 8554abc 4d7e26e 8554abc 4d7e26e 8554abc 4d7e26e 8554abc 4d7e26e 8554abc 4d7e26e | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 | (function (root) {
"use strict";
const DB_NAME = "voiceofml-reader";
const STORE_NAME = "entries";
const BOOKMARK_STORE_NAME = "bookmarks";
const MAX_ENTRIES = 200;
let databasePromise = null;
function openDatabase() {
if (databasePromise) return databasePromise;
const opening = new Promise((resolve, reject) => {
const request = indexedDB.open(DB_NAME, 2);
request.onupgradeneeded = () => {
const database = request.result;
if (!database.objectStoreNames.contains(STORE_NAME)) {
const store = database.createObjectStore(STORE_NAME, { keyPath: "url" });
store.createIndex("lastReadAt", "lastReadAt");
}
if (!database.objectStoreNames.contains(BOOKMARK_STORE_NAME)) {
const bookmarks = database.createObjectStore(BOOKMARK_STORE_NAME, { keyPath: "id" });
bookmarks.createIndex("url", "url");
bookmarks.createIndex("createdAt", "createdAt");
}
};
request.onsuccess = () => {
const database = request.result;
database.onversionchange = () => { database.close(); if (databasePromise === opening) databasePromise = null; };
if (databasePromise !== opening) { database.close(); return; }
resolve(database);
};
request.onblocked = () => { if (databasePromise === opening) databasePromise = null; reject(new Error("Reader database upgrade was blocked by another tab")); };
request.onerror = () => { if (databasePromise === opening) databasePromise = null; reject(request.error); };
});
databasePromise = opening;
return databasePromise;
}
async function transaction(mode, callback) {
const database = await openDatabase();
return new Promise((resolve, reject) => {
const tx = database.transaction(STORE_NAME, mode);
const result = callback(tx.objectStore(STORE_NAME));
tx.oncomplete = () => resolve(result);
tx.onerror = () => reject(tx.error);
tx.onabort = () => reject(tx.error);
});
}
async function get(url) {
const database = await openDatabase();
return new Promise((resolve, reject) => {
const tx = database.transaction(STORE_NAME, "readonly");
const request = tx.objectStore(STORE_NAME).get(url);
request.onsuccess = () => resolve(request.result || null);
request.onerror = () => reject(request.error);
});
}
async function put(entry) {
const database = await openDatabase();
await new Promise((resolve, reject) => {
const tx = database.transaction(STORE_NAME, "readwrite");
const store = tx.objectStore(STORE_NAME);
const existing = store.get(entry.url);
existing.onsuccess = () => {
if (existing.result) {
store.put(entry);
return;
}
const count = store.count();
count.onsuccess = () => {
if (count.result < MAX_ENTRIES) {
store.put(entry);
return;
}
const oldest = store.index("lastReadAt").openCursor();
oldest.onsuccess = () => {
if (oldest.result) oldest.result.delete();
store.put(entry);
};
};
};
tx.oncomplete = resolve;
tx.onerror = () => reject(tx.error);
tx.onabort = () => reject(tx.error);
});
}
async function list(limit = MAX_ENTRIES) {
const database = await openDatabase();
return new Promise((resolve, reject) => {
const entries = [];
const tx = database.transaction(STORE_NAME, "readonly");
const request = tx.objectStore(STORE_NAME).index("lastReadAt").openCursor(null, "prev");
request.onsuccess = () => {
const cursor = request.result;
if (!cursor || entries.length >= limit) return resolve(entries);
entries.push(cursor.value); cursor.continue();
};
request.onerror = () => reject(request.error);
});
}
async function remove(url) { await transaction("readwrite", (store) => store.delete(url)); }
async function clearHistory() { await transaction("readwrite", (store) => store.clear()); }
async function putBookmark(entry) {
const database = await openDatabase();
await new Promise((resolve, reject) => {
const tx = database.transaction(BOOKMARK_STORE_NAME, "readwrite");
tx.objectStore(BOOKMARK_STORE_NAME).put(entry);
tx.oncomplete = resolve; tx.onerror = () => reject(tx.error); tx.onabort = () => reject(tx.error);
});
}
async function listBookmarks(url) {
const database = await openDatabase();
return new Promise((resolve, reject) => {
const entries = [];
const tx = database.transaction(BOOKMARK_STORE_NAME, "readonly");
const request = tx.objectStore(BOOKMARK_STORE_NAME).index("url").openCursor(IDBKeyRange.only(url));
request.onsuccess = () => {
const cursor = request.result;
if (!cursor) return resolve(entries.sort((a, b) => b.createdAt - a.createdAt));
entries.push(cursor.value); cursor.continue();
};
request.onerror = () => reject(request.error);
});
}
async function listAllBookmarks() {
const database = await openDatabase();
return new Promise((resolve, reject) => {
const entries = [];
const tx = database.transaction(BOOKMARK_STORE_NAME, "readonly");
const request = tx.objectStore(BOOKMARK_STORE_NAME).index("createdAt").openCursor(null, "prev");
request.onsuccess = () => {
const cursor = request.result;
if (!cursor) return resolve(entries);
entries.push(cursor.value); cursor.continue();
};
request.onerror = () => reject(request.error);
});
}
async function removeBookmark(id) {
const database = await openDatabase();
await new Promise((resolve, reject) => {
const tx = database.transaction(BOOKMARK_STORE_NAME, "readwrite");
tx.objectStore(BOOKMARK_STORE_NAME).delete(id);
tx.oncomplete = resolve; tx.onerror = () => reject(tx.error); tx.onabort = () => reject(tx.error);
});
}
root.VoiceOfMLReaderStore = Object.freeze({ DB_NAME, MAX_ENTRIES, get, put, list, remove, clearHistory, putBookmark, listBookmarks, listAllBookmarks, removeBookmark });
})(typeof self !== "undefined" ? self : window);
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