AngularJS:检查对象中是否存在键/值，并构造一个对象数组

下面是我正在使用的一个服务的方法。它查找来自项目的所有收入（与这个问题相关：Angular服务调用另一个服务），并生成一个新的对象数组。

我希望这一系列对象按年份和妊娠期对收入进行排序，这样我就可以很容易地在视图中循环（重复ng）

我的当前数据（由Incomes.buildAndGetIncomes()返回，您可以看到下面）：

[  

 {  
      "projectName":"Deuxième test",
      "clientName":"Deuxième client",
      "typeIncome":"Accompte",
      "amount":1000,
      "date":"2014-09-10",
      "notes":"Chèque / LDD",
      "trim":"third",
      "year":"2014"
   },
   {  
      "projectName":"efzefze",
      "clientName":"zfezefzef",
      "typeIncome":"Accompte",
      "amount":30,
      "date":"2014-09-10",
      "notes":"fzefzef",
      "trim":"third",
      "year":"2014"
   },
   {  
      "projectName":"Nouveau test",
      "clientName":"Nouveau client",
      "typeIncome":"Accompte",
      "amount":16,
      "date":"2014-09-19",
      "notes":"CC",
      "trim":"third",
      "year":"2014"
   },
   {  
      "projectName":"Nouveau projet",
      "clientName":"Nouveau client",
      "typeIncome":"Accompte",
      "amount":1200,
      "date":"2014-05-17",
      "notes":"Chèque cc",
      "trim":"second",
      "year":"2014"
   },
   {  
      "projectName":"Projet test",
      "clientName":"Client test",
      "typeIncome":"Accompte",
      "amount":1500,
      "date":"2014-01-15",
      "notes":"Chèque cc",
      "trim":"first",
      "year":"2014"
   },
   {  
      "projectName":"Deuxième test",
      "clientName":"Deuxième client",
      "typeIncome":"Reliquat",
      "amount":4500,
      "date":"2014-09-27",
      "notes":"Virement",
      "trim":"third",
      "year":"2014"
   },
   {  
      "projectName":"efzefze",
      "clientName":"zfezefzef",
      "typeIncome":"Reliquat",
      "amount":8,
      "date":"2014-09-05",
      "notes":"zefzefzef",
      "trim":"third",
      "year":"2014"
   },
   {  
      "projectName":"Nouveau test",
      "clientName":"Nouveau client",
      "typeIncome":"Reliquat",
      "amount":7,
      "date":"2014-09-27",
      "notes":"LDD",
      "trim":"third",
      "year":"2014"
   }
]

我想要的数据结构：

[
    {
        year: 2014,
        trim: [
            {
                name : 'first',
                content : [
                    // some content
                ]
            },
            {
                name : 'second',
                content : [
                    // some content
                ]
            }
        ]

    },
    {
        year: 2013,
        trim: [
            {
                name : 'first',
                content : [
                    // some content
                ]
            }
        ]

    }
]

这是我现在使用的方法：

self.trimestral = function(){
  var deferred = $q.defer();
  self.buildAndGetIncomes().then(function(result) {
    var trimestral = [];
    var incomes = result;

    angular.forEach(incomes, function(income, i){
      var year = income.year,
          trim = income.trim,
          newTrim = {},
          newTrimContent = {};
      if( i === 0 ){
          newTrim.year = year;
          newTrim.trim = [];
          newTrimContent ={};
          newTrimContent.name = trim;
          newTrimContent.content = [];
          newTrimContent.content.push(income);
          trimestral.push(newTrim);
          console.log(trimestral);
          trimestral[0].trim.push(newTrimContent);
      }
      else {
        var maxLength = incomes.length;
        for (var h = 0; h<maxLength; h++){
            if(trimestral[h].year === year){

                for (var j = 0; j<trimestral[h].trim.length; j++){
                  console.log(h,j,trimestral[h].trim[j].name === trim);
                  if(trimestral[h].trim[j].name === trim){ // trimester already exists
                    trimestral[h].trim[j].content.push(income);
                  }
                  else {// trimester doesn't exist, create it
                    var createTrim = {};
                    createTrim.name = trim;
                    createTrim.content = [];
                    createTrim.content.push(income);
                    trimestral[h].trim.push(newTrimContent);
                  }
                }


            }
            else {
             newTrim.year = year;
              newTrim.trim = [];
              newTrimContent ={};
              newTrimContent.name = trim;
              newTrimContent.content = [];
              newTrimContent.content.push(income);
              trimestral.push(newTrim);
              console.log(trimestral);
              trimestral[0].trim.push(newTrimContent);
            }
        }
      }
    });
   deferred.resolve(trimestral);      
  });
return deferred.promise;    
};

这个代码按预期工作，它检查我们是否在循环的第一个索引上，并推送该三个月的年份/三个月/内容。这种结构还可以。

现在我的问题是，我需要检查年份是否已经存在，然后，检查年份对象中是否存在妊娠期，构建一个对象数组，就像我粘贴在上面一样

我尝试了很多方法来做到这一点，但对我的JS技能来说似乎太难了。。。有什么帮助吗？