add_datadog_func.js

'use strict';

System.register(['angular', 'lodash', 'jquery', './dfunc'], function (_export, _context) {
  "use strict";

  var angular, _, $, dfunc;

  function getAllFunctionNames(categories) {
    return _.reduce(categories, function (list, category) {
      _.each(category, function (func) {
        list.push(func.name);
      });
      return list;
    }, []);
  }

  function createFunctionDropDownMenu(categories) {
    return _.map(categories, function (list, category) {
      return {
        text: category,
        submenu: _.map(list, function (value) {
          return {
            text: value.name,
            click: "ctrl.addFunction('" + value.name + "')"
          };
        })
      };
    });
  }
  return {
    setters: [function (_angular) {
      angular = _angular.default;
    }, function (_lodash) {
      _ = _lodash.default;
    }, function (_jquery) {
      $ = _jquery.default;
    }, function (_dfunc) {
      dfunc = _dfunc.default;
    }],
    execute: function () {

      angular.module('grafana.directives').directive('datadogAddFunc', function ($compile) {
        var inputTemplate = '<input type="text"' + ' class="gf-form-input"' + ' spellcheck="false" style="display:none"></input>';

        var buttonTemplate = '<a  class="gf-form-label query-part dropdown-toggle"' + ' tabindex="1" gf-dropdown="functionMenu" data-toggle="dropdown">' + '<i class="fa fa-plus"></i></a>';

        return {
          link: function link($scope, elem) {
            var categories = dfunc.getCategories();
            var allFunctions = getAllFunctionNames(categories);
            var ctrl = $scope.ctrl;

            $scope.functionMenu = createFunctionDropDownMenu(categories);

            var $input = $(inputTemplate);
            var $button = $(buttonTemplate);
            $input.appendTo(elem);
            $button.appendTo(elem);

            $input.attr('data-provide', 'typeahead');
            $input.typeahead({
              source: allFunctions,
              minLength: 1,
              items: 10,
              updater: function updater(value) {
                var funcDef = dfunc.getFuncDef(value);
                if (!funcDef) {
                  // try find close match
                  value = value.toLowerCase();
                  funcDef = _.find(allFunctions, function (funcName) {
                    return funcName.toLowerCase().indexOf(value) === 0;
                  });

                  if (!funcDef) {
                    return;
                  }
                }

                $scope.$apply(function () {
                  ctrl.addFunction(funcDef);
                });

                $input.trigger('blur');
                return '';
              }
            });

            $button.click(function () {
              $button.hide();
              $input.show();
              $input.focus();
            });

            $input.keyup(function () {
              elem.toggleClass('open', $input.val() === '');
            });

            $input.blur(function () {
              // clicking the function dropdown menu wont
              // work if you remove class at once
              setTimeout(function () {
                $input.val('');
                $input.hide();
                $button.show();
                elem.removeClass('open');
              }, 200);
            });

            $compile(elem.contents())($scope);
          }
        };
      });
    }
  };
});
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