chore: add demo mode

store/db/db.go

@@ -19,6 +19,9 @@ import (
 //go:embed migration
 var migrationFS embed.FS
 
+//go:embed seed
+var seedFS embed.FS
+
 type DB struct {
 	profile *profile.Profile
 	// sqlite db connection instance
@@ -119,6 +122,12 @@ func (db *DB) Open(ctx context.Context) (err error) {
 			if err := db.applyLatestSchema(ctx); err != nil {
 				return fmt.Errorf("failed to apply latest schema: %w", err)
 			}
+			// In demo mode, we should seed the database.
+			if db.profile.Mode == "demo" {
+				if err := db.seed(ctx); err != nil {
+					return fmt.Errorf("failed to seed: %w", err)
+				}
+			}
 		}
 	}
 
@@ -185,6 +194,28 @@ func (db *DB) applyMigrationForMinorVersion(ctx context.Context, minorVersion st
 	return tx.Commit()
 }
 
+func (db *DB) seed(ctx context.Context) error {
+	filenames, err := fs.Glob(seedFS, fmt.Sprintf("%s/*.sql", "seed"))
+	if err != nil {
+		return fmt.Errorf("failed to read seed files, err: %w", err)
+	}
+
+	sort.Strings(filenames)
+
+	// Loop over all seed files and execute them in order.
+	for _, filename := range filenames {
+		buf, err := seedFS.ReadFile(filename)
+		if err != nil {
+			return fmt.Errorf("failed to read seed file, filename=%s err=%w", filename, err)
+		}
+		stmt := string(buf)
+		if err := db.execute(ctx, stmt); err != nil {
+			return fmt.Errorf("seed error: statement:%s err=%w", stmt, err)
+		}
+	}
+	return nil
+}
+
 // execute runs a single SQL statement within a transaction.
 func (db *DB) execute(ctx context.Context, stmt string) error {
 	tx, err := db.DBInstance.Begin()