1 files changed, 53 insertions, 0 deletions
diff --git a/models/db/common.go b/models/db/common.go
new file mode 100644
index 0000000..f3fd3e7
--- /dev/null
+++ b/models/db/common.go
@@ -0,0 +1,53 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package db
+
+import (
+	"strings"
+
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/util"
+
+	"xorm.io/builder"
+)
+
+// BuildCaseInsensitiveLike returns a condition to check if the given value is like the given key case-insensitively.
+// Handles especially SQLite correctly as UPPER there only transforms ASCII letters.
+func BuildCaseInsensitiveLike(key, value string) builder.Cond {
+	if setting.Database.Type.IsSQLite3() {
+		return builder.Like{"UPPER(" + key + ")", util.ToUpperASCII(value)}
+	}
+	return builder.Like{"UPPER(" + key + ")", strings.ToUpper(value)}
+}
+
+// BuildCaseInsensitiveIn returns a condition to check if the given value is in the given values case-insensitively.
+// Handles especially SQLite correctly as UPPER there only transforms ASCII letters.
+func BuildCaseInsensitiveIn(key string, values []string) builder.Cond {
+	uppers := make([]string, 0, len(values))
+	if setting.Database.Type.IsSQLite3() {
+		for _, value := range values {
+			uppers = append(uppers, util.ToUpperASCII(value))
+		}
+	} else {
+		for _, value := range values {
+			uppers = append(uppers, strings.ToUpper(value))
+		}
+	}
+
+	return builder.In("UPPER("+key+")", uppers)
+}
+
+// BuilderDialect returns the xorm.Builder dialect of the engine
+func BuilderDialect() string {
+	switch {
+	case setting.Database.Type.IsMySQL():
+		return builder.MYSQL
+	case setting.Database.Type.IsSQLite3():
+		return builder.SQLITE
+	case setting.Database.Type.IsPostgreSQL():
+		return builder.POSTGRES
+	default:
+		return ""
+	}
+}