initial commit

on.go

@@ -0,0 +1,41 @@
+package simql
+
+import (
+	"fmt"
+	"strings"
+)
+
+type OnClause struct {
+	column   string
+	operator string
+	value    any
+
+	and []*OnClause
+}
+
+func (o *OnClause) And(column, operator string, value any) *OnClause {
+	o.and = append(o.and, On(column, operator, value))
+	return o
+}
+
+func (o *OnClause) String() string {
+	strs := []string{fmt.Sprintf("%s %s %s", o.column, o.operator, o.value)}
+
+	for _, next := range o.and {
+		strs = append(strs, "and", next.String())
+	}
+
+	return strings.Join(strs, " ")
+}
+
+func On(column, operator string, value any) *OnClause {
+	o := &OnClause{
+		column:   column,
+		operator: operator,
+		value:    value,
+
+		and: []*OnClause{},
+	}
+
+	return o
+}