Cleanup parser statements, add delete and insert statement, add TASKS.md for tracking tasks

manager.go

@@ -126,21 +126,60 @@ func (m *Manager) RunSql(sqlText string) (Table, error) {
 		return Table{}, err
 	}
 
-	selectStmt, ok := stmt.(*engine.SelectStatement)
-	if !ok {
+	switch v := stmt.(type) {
+	case *engine.SelectStatement:
+		return m.tableFromSelectStatement(sqlText, v)
+
+	case *engine.InsertStatement:
+		if !slices.ContainsFunc(m.tables, func(t Table) bool {
+			return v.Table == t.Name
+		}) {
+			return Table{}, fmt.Errorf("Table not found")
+		}
+
+		res, err := m.conn.Exec(sqlText)
+		if err != nil {
+			return Table{}, err
+		}
+		affected, err := res.RowsAffected()
+		if err != nil {
+			return Table{}, err
+		}
+		return Table{}, fmt.Errorf("Rows affected: %v", affected)
+
+	case *engine.DeleteStatement:
+		if !slices.ContainsFunc(m.tables, func(t Table) bool {
+			return v.Table == t.Name
+		}) {
+			return Table{}, fmt.Errorf("Table not found")
+		}
+
+		res, err := m.conn.Exec(sqlText)
+		if err != nil {
+			return Table{}, err
+		}
+		affected, err := res.RowsAffected()
+		if err != nil {
+			return Table{}, err
+		}
+		return Table{}, fmt.Errorf("Rows affected: %v", affected)
+
+	default:
 		return Table{}, fmt.Errorf("Input statement is not of correct Syntax, select statement")
 	}
+}
 
-	table, ok := m.GetTable(selectStmt.From)
+func (m *Manager) tableFromSelectStatement(sqlText string, stmt *engine.SelectStatement) (Table, error) {
+	table, ok := m.GetTable(stmt.From)
 	if !ok {
 		return Table{}, fmt.Errorf("Selected Table does not exist, have you perhaps misstyped the table Name?")
 	}
 
 	fields := make([]Column, 0)
-	if slices.Contains(selectStmt.Fields, "*") {
+	if slices.Contains(stmt.Fields, "*") {
 		fields = table.Columns
 	} else {
-		for _, columnName := range selectStmt.Fields {
+		for _, columnName := range stmt.Fields {
 			index := slices.IndexFunc(table.Columns, func(c Column) bool {
 				if c.Name == columnName {
 					return true
@@ -153,7 +192,7 @@ func (m *Manager) RunSql(sqlText string) (Table, error) {
 	}
 	table.Columns = fields
 
-	err = m.loadTableRaw(&table, fields, sqlText)
+	err := m.loadTableRaw(&table, fields, sqlText)
 	if err != nil {
 		return Table{}, err
 	}