add delete query

delete.go

@@ -0,0 +1,69 @@
+package simql
+
+import (
+	"strings"
+)
+
+// https://www.sqlite.org/lang_delete.html
+type DeleteQuery struct {
+	table SelectTable
+
+	where []Where
+	args  []any
+}
+
+func (q *DeleteQuery) Args() []any {
+	return q.args
+}
+
+func (q *DeleteQuery) IsValid() bool {
+	if !q.table.IsValid() {
+		return false
+	}
+
+	for _, w := range q.where {
+		if !w.IsValid() {
+			return false
+		}
+	}
+
+	return false
+}
+
+func (q *DeleteQuery) String() string {
+	strs := []string{"delete", q.table.String()}
+
+	if len(q.where) > 0 {
+		strs = append(strs, "where")
+
+		for _, w := range q.where {
+			strs = append(strs, w.String())
+		}
+	}
+
+	return strings.Join(strs, " ")
+}
+
+func (q *DeleteQuery) Where(def string, args ...any) *DeleteQuery {
+	q.where = append(q.where, Where(def))
+
+	if len(args) > 0 {
+		if q.args == nil {
+			q.args = []any{}
+		}
+
+		q.args = append(q.args, args...)
+	}
+
+	return q
+}
+
+func Delete(from string) *DeleteQuery {
+	q := &DeleteQuery{
+		table: From(from),
+
+		where: []Where{},
+	}
+
+	return q
+}