angular.module('syncthing.core') .directive('pathIsSubDir', function () { return { require: 'ngModel', link: function (scope, elm, attrs, ctrl) { ctrl.$parsers.unshift(function (viewValue) { // This function checks whether ydir is a subdirectory of xdir, // e.g. it would return true if xdir = "/home/a", ydir = "/home/a/b". function isSubDir(xdir, ydir) { var xdirArr = xdir.split(scope.system.pathSeparator); var ydirArr = ydir.split(scope.system.pathSeparator); if (xdirArr.slice(-1).pop() === "") { xdirArr = xdirArr.slice(0, -1); } if (xdirArr.length > ydirArr.length) { return false; } return xdirArr.map(function (e, i) { return xdirArr[i] === ydirArr[i]; }).every(function (e) { return e }); } scope.folderPathErrors.isSub = false; scope.folderPathErrors.isParent = false; scope.folderPathErrors.otherID = ""; scope.folderPathErrors.otherLabel = ""; for (var folderID in scope.folders) { if (isSubDir(scope.folders[folderID].path, viewValue)) { scope.folderPathErrors.otherID = folderID; scope.folderPathErrors.otherLabel = scope.folders[folderID].label; scope.folderPathErrors.isSub = true; break; } if (viewValue !== "" && isSubDir(viewValue, scope.folders[folderID].path)) { scope.folderPathErrors.otherID = folderID; scope.folderPathErrors.otherLabel = scope.folders[folderID].label; scope.folderPathErrors.isParent = true; break; } } return viewValue; }); } }; });