working on sqlite migrations

.gitignore

@@ -19,4 +19,4 @@ go.work.sum
 
 # env file
 .env
-
+wargh.db

db/db.go

@@ -0,0 +1,64 @@
+package db
+
+import (
+	"database/sql"
+	"log"
+	"os"
+
+	_ "github.com/mattn/go-sqlite3"
+)
+
+type DBConfig struct {
+	DBPath         string
+	MigrationsPath string
+}
+
+var config *DBConfig = nil
+
+func Init(_config *DBConfig) {
+	config = _config
+}
+
+func checkConfig() {
+	if config == nil {
+		log.Fatal("DBConfig not initialized! Call db.Init!")
+		os.Exit(1)
+	}
+}
+
+func open(dbPath string) (*sql.DB, error) {
+	db, err := sql.Open("sqlite3", dbPath)
+	if err != nil {
+		return nil, err
+	}
+
+	/* if database is empty. we must create
+	'_migration` table and apply all releveant migrations
+	*/
+	_, err = db.Query("SELECT id FROM `_migration` LIMIT 1;")
+	if err != nil {
+		// create table
+		_, err = db.Exec(`
+		CREATE TABLE _migration (
+			id		INTEGER PRIMARY KEY AUTOINCREMENT,
+			seq		INTEGER	NOT NULL UNIQUE,
+			name	TEXT	NOT NULL UNIQUE
+		);`)
+		// can't create migration table - fatal
+		if err != nil {
+			return nil, err
+		}
+	}
+	return db, nil
+}
+
+func Open() (*sql.DB, error) {
+	checkConfig()
+
+	db, err := open(config.DBPath)
+	if err != nil {
+		return nil, err
+	}
+
+	return db, nil
+}

go.mod

@@ -1,3 +1,7 @@
 module wargh
 
 go 1.23.2
+
+require (
+	github.com/mattn/go-sqlite3 v1.14.24 // indirect
+)

go.sum

@@ -0,0 +1,4 @@
+github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
+github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
+github.com/mattn/go-sqlite3 v1.14.24 h1:tpSp2G2KyMnnQu99ngJ47EIkWVmliIizyZBfPrBWDRM=
+github.com/mattn/go-sqlite3 v1.14.24/go.mod h1:Uh1q+B4BYcTPb+yiD3kU8Ct7aC0hY9fxUwlHK0RXw+Y=

main.go

@@ -0,0 +1,26 @@
+package main
+
+import (
+	"log"
+	"os"
+	"wargh/db"
+)
+
+const DB_PATH = "wargh.db"
+
+func main() {
+	db.Init(&db.DBConfig{
+		DBPath:         DB_PATH,
+		MigrationsPath: "",
+	})
+
+	DB, err := db.Open()
+	if err != nil {
+		log.Fatal(err)
+		os.Exit(1)
+	}
+	defer DB.Close()
+
+	_, err = DB.Exec("CREATE TABLE test (id INTEGER PRIMARY KEY AUTOINCREMENT, value TEXT NOT NULL);")
+	log.Fatal(err)
+}

notes.txt

@@ -0,0 +1,8 @@
+wargh is web-application to manage recursively wgetted websites.
+
+That implies a need for database to track record of archived sites, their names and files.
+For such database shall be used sqlite.
+
+But most important is admin UI, that starts and manages ongoing wget jobs.
+Output of wget process should be piped through websocket to frontend, where its rendered
+with https://github.com/xtermjs/xterm.js