ng_data_model/ng_data_model.js at master · Spectory/ng_data_model · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
/*globals angular, document, JST, window, _ */
angular.module('app').factory('dataModel',
  function () {
    'use strict';
    var dm = {};
    var data = {};
    var RANDOM_VAL = Math.random().toString(36);

    /****************** Helpers ******************/

    function buildErr(location, args) {
      var msg = args.join('');
      return ['Error at', location, ':', msg].join(' ');
    }

    function isUndefined(model_name, location) {
      if (data[model_name]) {
        return;
      }
      return {status: 0, msg: buildErr(location, ['cant find model by name ', '"', model_name, '"'])};
    }

    function objHasNoId(obj, location) {
      if (_.has(obj, 'id')) {
        return;
      }
      return {status: 0, msg: buildErr(location, ['obj must have an id attr ', '"', obj, '"'])};
    }

    dm.mockWith = function (obj) {
      data = obj;
    };

    /****************** Helpers ******************/

    dm.init = function () {
      data = {};
    };

    dm.initModelByName = function (model_name) {
      data[model_name] = [];
    };

    dm.getModelByName = function (model_name) {
      var err = isUndefined(model_name, 'getModelByName');
      if (err) {
        return err;
      }
      return {status: 1, data: data[model_name]};
    };

    dm.addToModel = function (model_name, obj) {
      var err = isUndefined(model_name, 'addToModel');
      if (err) {
        return err;
      }
      err = objHasNoId(obj, 'addToModel');
      if (err) {
        return err;
      }
      data[model_name].push(obj);
      return {status: 1};
    };

    /*
    * returns all members in model_name s.t member.attr is a valid key.
    */
    dm.filterModelByAttr = function (model_name, attr) {
      return dm.filterModelByAttrAndValue(model_name, attr, RANDOM_VAL);
    };

    /*
    * returns all members in model_name s.t member.attr === value
    */
    dm.filterModelByAttrAndValue = function (model_name, attr, value) {
      var err = isUndefined(model_name, 'filterModelByAttrAndValue');
      if (err) {
        return err;
      }
      return _.filter(data[model_name], function (member) {
        if (value === RANDOM_VAL) {
          return member[attr];
        }
        return member[attr] === value;
      });
    };

    dm.filterModelByAttrAndValuesArray = function (model_name, attr, value_arr) {
      var err = isUndefined(model_name, 'filterModelByAttrAndValuesArray');
      if (err) {
        return err;
      }
      return _.filter(data[model_name], function (member) {
        return _.contains(value_arr, member[attr]);
      });
    };

    dm.groupModelByAttr = function (model_name, attr) {
      var err = isUndefined(model_name, 'groupModelByAttr');
      if (err) {
        return err;
      }
      var res = {};
      res.unknown = [];
      _.each(data[model_name], function (member) {
        if (member[attr]) {
          if (!res[member[attr]]) {
            res[member[attr]] = [];
          }
          res[member[attr]].push(member);
        } else {
          res.unknown.push(member);
        }
      });
      return res;
    };

    dm.joinView = function (model_name, join_model_name, prefix, onAttrs) {
      var err = isUndefined(model_name, 'joinView');
      if (err) {
        return err;
      }
      err = isUndefined(join_model_name, 'joinView');
      if (err) {
        return err;
      }
      var res = [];
      var selected_attr = onAttrs[0];
      var join_attr = onAttrs[1];
      var clone, found_join_target, keys;
      _.each(data[model_name], function (member) {
        clone = null;
        found_join_target = _.find(data[join_model_name], function (join_member) {
          return member[selected_attr] === join_member[join_attr];
        });
        if (found_join_target) {
          clone = _.cloneDeep(member);
          keys = _.keys(found_join_target);
          var unwanted_element_index = keys.indexOf("$$hashKey");
          if (unwanted_element_index !== -1) {
            keys.splice(keys.indexOf("$$hashKey"), 1);
          }
          _.each(keys, function (key) {
            if (key !== join_attr) {
              clone[prefix + key] = found_join_target[key];
            }
          });
          res.push(clone);
        }
      });
      return res;
    };

    return dm;
  });