chore: initial import 萌邮 MengPost (React+Vite + Go+Gin)

Made-with: Cursor

mengpost-backend/database/db.go

@@ -0,0 +1,59 @@
+package database
+
+import (
+	"database/sql"
+	"log"
+
+	_ "modernc.org/sqlite"
+)
+
+var DB *sql.DB
+
+// Init 打开 SQLite 并执行必要的表结构初始化.
+// 使用纯 Go 的 modernc.org/sqlite, 无需 CGO.
+func Init(path string) {
+	dsn := "file:" + path + "?_pragma=busy_timeout(5000)&_pragma=journal_mode(WAL)&_pragma=foreign_keys(1)"
+	db, err := sql.Open("sqlite", dsn)
+	if err != nil {
+		log.Fatalf("open sqlite: %v", err)
+	}
+	DB = db
+	if err := migrate(); err != nil {
+		log.Fatalf("migrate: %v", err)
+	}
+}
+
+// migrate 创建所需表. 统一放在一处便于维护.
+func migrate() error {
+	stmts := []string{
+		`CREATE TABLE IF NOT EXISTS accounts (
+            id         INTEGER PRIMARY KEY AUTOINCREMENT,
+            name       TEXT NOT NULL,
+            email      TEXT NOT NULL UNIQUE,
+            password   TEXT NOT NULL,
+            smtp_host  TEXT NOT NULL,
+            smtp_port  INTEGER NOT NULL,
+            imap_host  TEXT NOT NULL,
+            imap_port  INTEGER NOT NULL,
+            use_tls    INTEGER DEFAULT 1,
+            created_at DATETIME DEFAULT CURRENT_TIMESTAMP
+        );`,
+		`CREATE TABLE IF NOT EXISTS sent_logs (
+            id         INTEGER PRIMARY KEY AUTOINCREMENT,
+            account_id INTEGER NOT NULL,
+            to_addr    TEXT NOT NULL,
+            subject    TEXT,
+            body       TEXT,
+            status     TEXT,
+            error      TEXT,
+            created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+            FOREIGN KEY(account_id) REFERENCES accounts(id) ON DELETE CASCADE
+        );`,
+	}
+	for _, s := range stmts {
+		if _, err := DB.Exec(s); err != nil {
+			return err
+		}
+	}
+	return nil
+}