feat:添加本地数据库

src/lib/sqlite.js

@@ -0,0 +1,82 @@
+import { Capacitor } from '@capacitor/core'
+import { CapacitorSQLite, SQLiteConnection } from '@capacitor-community/sqlite'
+import { defineCustomElements as defineJeep } from 'jeep-sqlite/loader'
+
+const DB_NAME = 'echo_local'
+const DB_VERSION = 1
+const TRANSACTION_TABLE_SQL = `
+  CREATE TABLE IF NOT EXISTS transactions (
+    id TEXT PRIMARY KEY NOT NULL,
+    amount REAL NOT NULL,
+    merchant TEXT NOT NULL,
+    category TEXT DEFAULT 'Uncategorized',
+    date TEXT NOT NULL,
+    note TEXT,
+    sync_status INTEGER DEFAULT 0
+  );
+`
+
+let sqliteConnection
+let db
+let initialized = false
+
+const ensureJeepElement = async () => {
+  if (!customElements.get('jeep-sqlite')) {
+    defineJeep(window)
+  }
+  if (!document.querySelector('jeep-sqlite')) {
+    const jeepEl = document.createElement('jeep-sqlite')
+    document.body.appendChild(jeepEl)
+  }
+  await CapacitorSQLite.initWebStore()
+}
+
+const prepareConnection = async () => {
+  if (!sqliteConnection) {
+    sqliteConnection = new SQLiteConnection(CapacitorSQLite)
+  }
+
+  if (Capacitor.getPlatform() === 'web') {
+    await ensureJeepElement()
+  }
+
+  const consistency = await sqliteConnection.checkConnectionsConsistency()
+  if (!consistency.result) {
+    await sqliteConnection.closeAllConnections()
+  }
+
+  const isConn = (await sqliteConnection.isConnection(DB_NAME, false)).result
+  if (isConn) {
+    db = await sqliteConnection.retrieveConnection(DB_NAME, false)
+  } else {
+    db = await sqliteConnection.createConnection(DB_NAME, false, 'no-encryption', DB_VERSION, false)
+  }
+
+  await db.open()
+  await db.execute(TRANSACTION_TABLE_SQL)
+  initialized = true
+}
+
+export const initSQLite = async () => {
+  if (!initialized) {
+    await prepareConnection()
+  }
+  return db
+}
+
+export const getDb = async () => {
+  if (!initialized) {
+    await initSQLite()
+  }
+  return db
+}
+
+export const closeSQLite = async () => {
+  if (db) {
+    await db.close()
+    db = null
+  }
+  initialized = false
+}
+
+export const databaseName = DB_NAME