1 files changed, 70 insertions, 0 deletions
diff --git a/database/migrate.go b/database/migrate.go
new file mode 100644
index 0000000..a6b63f8
--- /dev/null
+++ b/database/migrate.go
@@ -0,0 +1,70 @@
+package database
+
+import (
+	"log"
+
+	"database/sql"
+
+	_ "github.com/mattn/go-sqlite3"
+)
+
+type Migrator func(*sql.DB) (*sql.DB, error)
+
+func AddFriends(dbConn *sql.DB) (*sql.DB, error) {
+	_, err := dbConn.Exec(`CREATE TABLE IF NOT EXISTS frens (
+           id TEXT PRIMARY KEY,
+           name TEXT
+        );`)
+	if err != nil {
+		return dbConn, err
+	}
+
+	log.Println("creating unique index on frens table")
+	_, err = dbConn.Exec(`CREATE UNIQUE INDEX IF NOT EXISTS idx_frens_name ON frens (name);`)
+	if err != nil {
+		return dbConn, err
+	}
+
+	return dbConn, nil
+}
+
+func AddMessages(dbConn *sql.DB) (*sql.DB, error) {
+	_, err := dbConn.Exec(`CREATE TABLE IF NOT EXISTS messages (
+           id TEXT PRIMARY KEY,
+           fren_id TEXT,
+           message TEXT,
+           time TIMESTAMP,
+           fren_sent BOOLEAN NOT NULL CHECK (fren_sent IN (0, 1)),
+           FOREIGN KEY (fren_id) REFERENCES frens (id) ON DELETE CASCADE
+        );`)
+	if err != nil {
+		return dbConn, err
+	}
+
+	log.Println("creating time and fren_id index on message table")
+	_, err = dbConn.Exec(`CREATE INDEX IF NOT EXISTS idx_message_timestamp ON messages (time);`)
+	_, err = dbConn.Exec(`CREATE INDEX IF NOT EXISTS idx_message_fren ON messages (fren_id);`)
+	if err != nil {
+		return dbConn, err
+	}
+
+	return dbConn, nil
+}
+
+func Migrate(dbConn *sql.DB) (*sql.DB, error) {
+	log.Println("migrating database")
+
+	migrations := []Migrator{
+		AddFriends,
+		AddMessages,
+	}
+
+	for _, migration := range migrations {
+		dbConn, err := migration(dbConn)
+		if err != nil {
+			return dbConn, err
+		}
+	}
+
+	return dbConn, nil
+}