1 files changed, 51 insertions, 0 deletions
diff --git a/db/rest/util/_api_validate_text.sql b/db/rest/util/_api_validate_text.sql
new file mode 100644
index 0000000..2a3764c
--- /dev/null
+++ b/db/rest/util/_api_validate_text.sql
@@ -0,0 +1,51 @@
+CREATE FUNCTION _api.validate_text(
+	_column TEXT DEFAULT '',
+	_text TEXT DEFAULT NULL,
+	_min INTEGER DEFAULT NULL,
+	_max INTEGER DEFAULT NULL,
+	_nullable BOOLEAN DEFAULT FALSE
+)
+RETURNS BOOLEAN
+LANGUAGE plpgsql VOLATILE
+AS $BODY$
+DECLARE
+	_length INTEGER;
+BEGIN
+
+	-- make sure that text can only be null
+	-- when we allow it
+	IF _text IS NULL AND NOT _nullable THEN
+		PERFORM _api.raise(
+			_msg => 'api_null_value',
+			_detail => _column
+		);
+	END IF;
+
+	IF _text IS NULL THEN
+		RETURN TRUE;
+	END IF;
+
+	_length = LENGTH(_text);
+
+	IF _min IS NOT NULL AND _length < _min THEN
+		PERFORM _api.raise(
+			_msg => 'api_text_min',
+			_detail => _column,
+			_hint => _min || ''
+		);
+	END IF;
+
+	IF _max IS NOT NULL AND _length > _max THEN
+		PERFORM _api.raise(
+			_msg => 'api_text_max',
+			_detail => _column,
+			_hint => _max || ''
+		);
+	END IF;
+
+	RETURN TRUE;
+END
+$BODY$;
+
+GRANT EXECUTE ON FUNCTION _api.validate_text(TEXT, TEXT, INTEGER, INTEGER, BOOLEAN)
+	TO rest_anon, rest_user;