Add query package

query/builder.go

@@ -0,0 +1,92 @@
+// Package query assists in building SQL queries.
+package query
+
+import (
+	"database/sql"
+)
+
+type Update struct {
+	Updates, Conditions string
+	Params              []interface{}
+
+	sep string
+}
+
+func NewUpdate() *Update {
+	return &Update{}
+}
+
+func (u *Update) Set(v, property string) *Update {
+	if v != "" {
+		u.Updates += u.sep + property + " = ?"
+		u.sep = ", "
+		u.Params = append(u.Params, v)
+	}
+	return u
+}
+
+func (u *Update) SetBytes(v []byte, property string) *Update {
+	if len(v) > 0 {
+		u.Updates += u.sep + property + " = ?"
+		u.sep = ", "
+		u.Params = append(u.Params, v)
+	}
+	return u
+}
+
+func (u *Update) SetStringPtr(v *string, property string) *Update {
+	if v != nil {
+		u.Updates += u.sep + property + " = ?"
+		u.sep = ", "
+		u.Params = append(u.Params, v)
+	}
+	return u
+}
+
+func (u *Update) SetIntPtr(v *int, property string) *Update {
+	if v != nil {
+		u.Updates += u.sep + property + " = ?"
+		u.sep = ", "
+		u.Params = append(u.Params, v)
+	}
+	return u
+}
+
+func (u *Update) SetBoolPtr(v *bool, property string) *Update {
+	if v != nil {
+		u.Updates += u.sep + property + " = ?"
+		u.sep = ", "
+		u.Params = append(u.Params, v)
+	}
+	return u
+}
+
+func (u *Update) SetNullBool(v *sql.NullBool, property string) *Update {
+	if v != nil {
+		u.Updates += u.sep + property + " = ?"
+		u.sep = ", "
+		u.Params = append(u.Params, v)
+	}
+	return u
+}
+
+func (u *Update) SetNullString(v *sql.NullString, property string) *Update {
+	if v != nil {
+		u.Updates += u.sep + property + " = ?"
+		u.sep = ", "
+		u.Params = append(u.Params, v)
+	}
+	return u
+}
+
+func (u *Update) Append(v interface{}) {
+	u.Params = append(u.Params, v)
+}
+
+func (u *Update) Where(condition string, params ...interface{}) *Update {
+	u.Conditions = condition
+	for _, p := range params {
+		u.Append(p)
+	}
+	return u
+}