AngularJSコードサンプル（サービス）

AngularJS : 1.6.5
Bootstrap : 3.3.7
　
※v1.2.3のサンプルはこちら。
　
■目次
（１）AngularJSのサービス　factory、service、provider
（２）AngularJSの$qサービスでpromises/deferredパターン
（３）AngularJSの$httpサービスの基本
（４）AngularJSの$httpサービスでPOST送信
（５）AngularJSの$qサービスを使ってhttpリクエストを複数実行
（６）AngularJSの$timeoutサービスと$intervalサービス
（７）$locationサービス
（８）$rootScopeを使ってコントローラ間でデータをやり取り

（１）AngularJSのサービス　factory、service、provider

１）コントローラのみの場合

SubCtrl-A

  • {{item.id}}=>{{item.msg}}

SubCtrl-B

  • {{item.id}}=>{{item.msg}}

２）サービスを使ってコントローラ間でログを共有

SubCtrl-A

  • {{item.id}}=>{{item.msg}}

SubCtrl-B

  • {{item.id}}=>{{item.msg}} 


１）コントローラのみの場合
<div ng-controller="mainCtrl">
<button ng-click="open('SubCtrl-A')">SubCtrl-A</button>
<button ng-click="open('SubCtrl-B')">SubCtrl-B</button>
<div ng-switch on="tab">
  <div ng-switch-when="SubCtrl-A">
    <div ng-controller="subCtrl">
      <h3>SubCtrl-A</h3>
      <ul>
        <li ng-repeat="item in logs">
          {{item.id}}=>{{item.msg}}
        </li>
      </ul>
      <button ng-click="add('Aのテストログメッセージ')">ログ記録</button>
    </div>
  </div>
  <div ng-switch-when="SubCtrl-B">
    <div ng-controller="subCtrl">
      <h3>SubCtrl-B</h3>
      <ul>
        <li ng-repeat="item in logs">
          {{item.id}}=>{{item.msg}}
        </li>
      </ul>
      <button ng-click="add('Bのテストログメッセージ')">ログ記録</button>
    </div>
  </div>
</div>
</div>
２）サービスを使ってコントローラ間でログを共有<br />
<div ng-controller="mainCtrl">
<button ng-click="open('SubCtrl-A')">SubCtrl-A</button>
<button ng-click="open('SubCtrl-B')">SubCtrl-B</button>
<div ng-switch on="tab">
  <div ng-switch-when="SubCtrl-A">
    <div ng-controller="subCtrl1">
      <h3>SubCtrl-A</h3>
      <ul>
        <li ng-repeat="item in lists()">
          {{item.id}}=>{{item.msg}}
        </li>
      </ul>
      <button ng-click="add('Aのテストログメッセージ')">ログ記録</button>
    </div>
  </div>
  <div ng-switch-when="SubCtrl-B">
    <div ng-controller="subCtrl1">
      <h3>SubCtrl-B</h3>
      <ul>
        <li ng-repeat="item in lists()">
          {{item.id}}=>{{item.msg}}
        </li>
      </ul>
      <button ng-click="add('Bのテストログメッセージ')">ログ記録</button>
    </div>
  </div>
</div>
</div>


１）コントローラのみの場合
var demoApp = angular.module('demoApp', []);

demoApp.controller('mainCtrl', function($scope) {
  $scope.tab = 'SubCtrl-A';
  $scope.open = function(tab) {
    $scope.tab = tab;
  };
});

demoApp.controller('subCtrl', function($scope) {
  $scope.logs = [];
  var logCount = 0;
  $scope.add = function(msg) {
    $scope.logs.push({
      id: ++logCount,
      msg: msg
    });
  };
});
２）サービスを使ってコントローラ間でログを共有
var demoApp = angular.module('demoApp', []);

demoApp.provider("LogService", function () {
  var logLevel = "Error";
  return {
    debugEnabled: function(chk) {
      if (chk) {
        logLevel = "Debug";
      }
      return logLevel;
    },
    $get: function () {
      var logs = [];
      var logCount = 0;
      return {
        lists: function() {
          return logs;
        },
        add: function(msg) {
          logs.push({
            id: ++logCount,
            msg: "[" + logLevel + "]" + msg
          });
        }
      }
    }
  }
});

demoApp.config(function(LogServiceProvider) {
  LogServiceProvider.debugEnabled(true);
});

demoApp.controller('mainCtrl', function($scope) {
  $scope.tab = 'SubCtrl-A';
  $scope.open = function(tab) {
    $scope.tab = tab;
  };
});

demoApp.controller('subCtrl1', function($scope,LogService) {
  $scope.lists = function() {
    return LogService.lists();
  };
  $scope.add = function(msg) {
    LogService.add(msg);
  };
});

※①factoryメソッドを使った場合
demoApp.factory('LogService', function() {
  var logs = [];
  var logCount = 0;
  var logLevel = "Error";
  return {
    lists: function() {
      return logs;
    },
    add: function(msg) {
      logs.push({
        id: ++logCount,
        msg: "[" + logLevel + "]" + msg
      });
    }
  };
});

※②serviceメソッドを使った場合
var Logger = function () {
  this.logs = [];
  this.logCount = 0;
  this.lists = function() {
    return this.logs;
  };
  this.add = function(msg) {
    this.logs.push({
      id: ++this.logCount,
      msg: "[" + this.logLevel + "]" + msg
    });
  };
};
var errorLogger = function () { };
errorLogger.prototype = new Logger();
errorLogger.prototype.logLevel = "Error";

angular.module('demoApp', [])
.service("LogService", errorLogger)

（２）AngularJSの$qサービスでpromises/deferredパターン

　
{{msg}}


<button ng-click="q_get(true)">msg取得（成功）</button>
<button ng-click="q_get(false)">msg取得（失敗）</button><br />
{{msg}}


var demoApp = angular.module('demoApp', []);

demoApp.factory('qService', function($timeout) {
  var totalnum=0;
  return {
    q_get: function(deferred,tf) {
      var updateValue = function(){
        $timeout(function(){
          totalnum++;
          if (tf) {
            deferred.resolve("サービス処理成功　全回数：" + totalnum );
          } else {
            deferred.reject("サービス処理失敗　全回数：" + totalnum );
          }
        },3000,true,tf);
      }
      updateValue();
    }
  }
});

demoApp.controller('qCtrl', function($scope,qService,$q) {
  $scope.q_get = function(tf) {
    $scope.msg = "処理中・・・";
    var deferred = $q.defer();
    deferred.promise.then(function (result) {
      $scope.msg = result;
    },function (reason) {
      $scope.msg = reason;
    })
    qService.q_get(deferred,tf);
  };
});

（３）AngularJSの$httpサービスの基本


Getリクエストでサーバー内のJSONファイルデータ取得

　
レスポンスステータス、ヘッダー

レスポンスデータ

№ 名前 年齢 住所
{{item.id}} {{item.name}} {{item.age}} {{item.address}} 

<button ng-click="getFriends(true)">データ取得</button><br />
<button ng-click="getFriends(false)">データ取得（エラー）</button><br />
<strong>レスポンスステータス、ヘッダー</strong><br />
<textarea class="form-control" rows="5">{{getFriendsResult}}</textarea>
<strong>レスポンスデータ</strong><br />
    <table class="table table-striped">
  <thead>
    <tr>
      <th>№</th><th>名前</th><th>年齢</th><th>住所</th>
    </tr>
  </thead>
  <tbody>
    <tr ng-repeat="item in friends" >
      <td>{{item.id}}</td><td>{{item.name}}</td><td>{{item.age}}</td><td>{{item.address}}</td>
    </tr>
  </tbody>
</table>


var demoApp = angular.module('demoApp', []);

demoApp.controller('http1Ctrl', function ($scope, $http) {
  var showResult = function (status, headers, config) {
    return "status: " + status + "\n\n" +
      "headers（レスポンスヘッダー）: " + angular.toJson(headers(),true) + "\n\n
" +
      "config（リクエストのconfig）: " + angular.toJson(config,true);
  };

  $scope.getFriends = function (tf) {
    var svrURL = (tf ? "../../wp-content/themes/wp/json/friends.json" :
 "invalid-url.php");
    var config = {};
    $http.get(svrURL, config)
      .then(function onSuccess(response) {
        $scope.getFriendsResult = showResult(response.status, response.headers, response.config);
        $scope.friends = response.data;
      }, function onError(response) {
        $scope.getFriendsResult = showResult(response.status, response.headers, response.config);
      });
  };
});



[
  {"id": 1, "name": "相田", "age": 20, "address": "東京都品川区"},
  {"id": 2, "name": "伊藤", "age": 55, "address": "神奈川県横浜市"},
  {"id": 3, "name": "上野", "age": 20, "address": "埼玉県川越市"},
  {"id": 4, "name": "江藤", "age": 37, "address": "東京都世田谷区"}
]

（４）AngularJSの$httpサービスでPOST送信

送信するデータ
{{send_data}}
１）AngularJSのデフォルト（JSONフォーマット）で送信

２）ヘッダー設定と送信データ変換を行ってx-www-form-urlencoded形式で送信


<span>送信するデータ</span><br />
<span>{{send_data}}</span><br />
<strong>１）AngularJSのデフォルト（JSONフォーマット）で送信</strong><br />
<button ng-click="postCall(false)">送信</button><br />
<strong>２）ヘッダー設定と送信データ変換を行ってx-www-form-urlencoded形式で送信</strong><br />
<button ng-click="postCall(true)">送信</button><br />
<textarea class="form-control" rows="3">{{postCallResult}}</textarea>


var demoApp = angular.module('demoApp', []);

demoApp.controller('transCtrl', function ($scope, $http) {
  var logResult = function (data, status, config) {
    if(angular.isObject(data)) {
      data = angular.toJson(data,true);
    }
    return "ステータス: " + status + "\n" +
      "送信データ: " + data + "\n" +
      "Content-Type: " + config.headers["Content-Type"] ;
  };
  $scope.send_data ={
    id: "0101",
    name: "鈴木"
  };
  $scope.postCall = function (trans) {
    if(trans){
      var config = {
        headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
        transformRequest: function(data) {
          var transStr;
          if (data) {
            for (var key in data) {
              if (transStr) {
                transStr += '&' + key + '=' + data[key];
              } else {
                transStr = key + '=' + data[key];
              }
            }
          }
          return transStr;
        }
      };
    }else{
      var config = {};
    }
    $http.post("../../wp-content/themes/wp/post_test.php", $scope.send_data, config)
      .then(function onSuccess(response) {
        $scope.postCallResult = logResult(response.data,response.status,response.config);
      }, function onError(response) {
        $scope.postCallResult = logResult(response.data,response.status,response.config);
      });
  };
});

（５）AngularJSの$qサービスを使ってhttpリクエストを複数実行

3つのhttpリクエストをチェインして実行

  • {{result1}}

3つのhttpリクエストを$q.allで実行

  • {{result2}}

httpリクエストをループ処理

  • {{result3}} 

    3つのhttpリクエストをチェインして実行<br />
    <button ng-click="chain()">実行</button><br />
    <ul>
      <li ng-repeat="result1 in results1">
        <span>{{result1}}</span>
      </li>
    </ul>
    3つのhttpリクエストを$q.allで実行<br />
    <button ng-click="all()">実行</button><br />
    <ul>
      <li ng-repeat="result2 in results2">
        <span>{{result2}}</span>
      </li>
    </ul>
    httpリクエストをループ処理<br />
    <button ng-click="loop()">実行</button><br />
    <ul>
      <li ng-repeat="result3 in results3">
        <span>{{result3}}</span>
      </li>
    </ul>


var demoApp = angular.module('demoApp', []);

demoApp.controller('chainCtrl', function ($scope, $http, $q) {
  $scope.chain = function() {
    $scope.results1 = [];
    $http.get("/ng/q_chain.php?first=5").then(function onSuccess(response) {
      $scope.results1.push(response.data);
      $http.get("/ng/q_chain.php?second=1").then(function onSuccess(response) {
        $scope.results1.push(response.data);
        $http.get("/ng/q_chain.php?third=3").then(function onSuccess(response) {
          $scope.results1.push(response.data);
        });
      });
    });
  };

  $scope.all = function() {
    $scope.results2 = [];
    var first  = $http.get("/ng/q_chain.php?first=5"),
        second = $http.get("/ng/q_chain.php?second=1"),
        third  = $http.get("/ng/q_chain.php?third=3");

    $q.all([first, second, third]).then(function(result) {
      angular.forEach(result, function(response) {
        $scope.results2.push(response.data);
      });
    });
  };

  $scope.loop = function() {
    $scope.results3 = [];
    $http.get("/ng/q_chain.php?init=1")
      .then(function onSuccess(response) {
        var total = response.data.length;
        var https = [];
        for(i=0; i < total;i++) {
          var cur = i;
          var ary = [response.data[i][1]];
          $scope.results3.push(ary);
          var url = "/ng/q_chain.php?" + response.data[i][0];
          var http = $http.get(url);
          https.push(http);
        };
        $q.all(https).then(function(result) {
          i=0;
          angular.forEach(result, function(response1) {
            $scope.results3[i].push(response1.data[0],response1.data[1],response1.data[2]);
            i++;
          });
        });
      });
  };
});

（６）AngularJSの$timeoutサービスと$intervalサービス

　

SubCtrl-A　$intervalのサンプルコード

現在の時刻:{{time}}

SubCtrl-B　$timeoutのサンプルコード

{{msg}} 


<button ng-click="open('timeSubCtrl-A')">SubCtrl-A</button>
<button ng-click="open('timeSubCtrl-B')">SubCtrl-B</button>
<div ng-switch on="tab">
  <div ng-switch-when="timeSubCtrl-A">
    <div ng-controller="timeSubCtrl">
      <strong>SubCtrl-A</strong><br />
      <strong>$intervalのサンプルコード</strong><br />
      <button ng-click="intervalRun()">実行</button><br />
      <span>現在の時刻:{{time}}</span>
    </div>
  </div>
  <div ng-switch-when="timeSubCtrl-B">
    <div ng-controller="timeSubCtrl">
      <strong>SubCtrl-B</strong><br />
      <strong>$timeoutのサンプルコード</strong><br />
      <button ng-click="delayRun()">実行</button><br />
      <span>{{msg}}</span><br />
    </div>
  </div>
</div>


var demoApp = angular.module('demoApp', []);

demoApp.controller('timeMainCtrl', function($scope) {
  $scope.tab = 'timeSubCtrl-A'; 
  $scope.open = function(tab) {
    $scope.tab = tab;
  };
});

demoApp.controller('timeSubCtrl', function ($scope,$timeout,$interval) {
  var time;
  $scope.delayRun = function(){
    $scope.msg = "実行開始" + new Date().toLocaleTimeString() + "->";
    $timeout(function(){
      $scope.msg += "実行終了" + new Date().toLocaleTimeString();
    },5000);
  }
  $scope.intervalRun = function(){
    time = $interval(function () {
      $scope.time = new Date().toLocaleTimeString();
      console.log($scope.time);
    }, 2000);
  }
  var intervalStop = function() {
    if (angular.isDefined(time)) {
      $interval.cancel(time);
      time = undefined;
    }
  };
  $scope.$on('$destroy', function() {
    console.log("destroy");
    intervalStop();
  });
});

（７）$locationサービス

１）path、search、hash、urlの指定方法

  • Path：URLのパス（Searchパラメータとhashを除いた部分）を指定
  • Search:クエリパラメータ（?名前1=値1&名前2=値2）を指定
  • Hash：ハッシュ"#value"を指定
  • URL：Path、Search、Hashを含めて指定

URL：{{url}}

２）$anchorScrollを使ってページ内スクロール

  • {{item.title}} 


１）path、search、hash、urlの指定方法<br />
<div ng-controller="locationCtrl">
  <ul>
    <li>Path：URLのパス（Searchパラメータとhashを除いた部分）を指定</li>
    <li>Search:クエリパラメータ（?名前1=値1&名前2=値2）を指定</li>
    <li>Hash：ハッシュ"#value"を指定</li>
    <li>URL：Path、Search、Hashを含めて指定</li>
  </ul>
  <div class="btn-group ">
    <button class="btn btn-primary" ng-click="setUrl('reset')">Reset</button><button class="btn btn-primary" ng-click="setUrl('path')">Path</button><button class="btn btn-primary" ng-click="setUrl('search')">Search</button><button class="btn btn-primary" ng-click="setUrl('hash')">Hash</button><button class="btn btn-primary" ng-click="setUrl('url')">URL</button>
  </div>
  <p>URL：{{url}}</p>
</div>

２）$anchorScrollを使ってページ内スクロール<br />
<div ng-controller="location2Ctrl">
  <input type="number" ng-model="showID" /><button class="btn btn-primary" ng-click="show(showID)">指定した記事へ</button>
  <ul>
    <li ng-repeat="item in items">
      <span id={{$index+1}} ng-class="{'bg-primary': item.focus}">{{item.title}}</span>
    </li>
  </ul>
  <button class="btn btn-primary" ng-click="show(1)">先頭の記事へ</a>
</div>


var demoApp = angular.module('demoApp', []);

demoApp.controller("locationCtrl", function ($scope, $location) {
  $scope.$on("$locationChangeSuccess", function (event) {
     $scope.url = $location.url();
  });
  var pathID = 0;
  var hashID = 0;
  var searchID = 0;
  $scope.setUrl = function (component) {
    switch (component) {
      case "reset":
        $location.url("/#nglocation");
        pathID = 0;
        hashID = 0;
        searchID = 0;
        break;
      case "path":
        ++pathID;
        $location.path("/path_A" + pathID + "/path_B" + pathID );
        break;
      case "search":
        ++searchID;
        $location.search("search" + searchID, "value" + searchID);
        break;
      case "hash":
        ++hashID;
        $location.hash("hash" + hashID);
        break;
      case "url":
        ++pathID;
        ++searchID;
        ++hashID;
        $location.url("/path_A" + pathID + "/path_B" + pathID + "?search" + searchID + "=value" + searchID + "#hash" + hashID);
        break;
    }
  }
});

demoApp.controller("location2Ctrl", function ($scope, $location, $anchorScroll)
{
  $scope.items = [];
  for (var i = 0; i < 30; i++) {
    $scope.items[i] = {
      title: "記事 " + (i + 1),
      focus: false
    };
  }
  $scope.show = function(id) {
    $location.hash(id);
    for (var i = 0; i < $scope.items.length; i++) {
      $scope.items[i].focus = false;
    };
    $scope.items[id-1].focus = true;
  }
});

（８）$rootScopeを使ってコントローラ間でデータをやり取り

Controller-A






{{success}}

{{info}}

{{warning}}

{{danger}}

Controller-B






{{success}}

{{info}}

{{warning}}

{{danger}}


<div class="well" ng-controller="scopeCtrl">
  <h4>Controller-A</h4>
  <form>
    <label>タイプ</label>
    <select ng-model="type" ng-options="item for item in types"></select>
    <label>メッセージ</label>
    <input ng-model="msg"><br />
    <button class="btn btn-primary" ng-click="alert(type, msg)">Send Alert</button>
  </form>
  <div ng-if="success != null">
    <p class="bg-success">{{success}}</p>
  </div>
  <div ng-if="info != null">
    <p class="bg-info">{{info}}</p>
  </div>
  <div ng-if="warning != null">
    <p class="bg-warning">{{warning}}</p>
  </div>
  <div ng-if="danger != null">
    <p class="bg-danger">{{danger}}</p>
  </div>
</div>
<div class="well" ng-controller="scopeCtrl">
  <h4>Controller-B</h4>
  <form>
    <label>タイプ</label>
    <select ng-model="type" ng-options="item for item in types"></select>
    <label>メッセージ</label>
    <input ng-model="msg"><br />
    <button class="btn btn-primary" ng-click="alert(type, msg)">Send Alert</button>
  </form>
  <div ng-if="success != null">
    <p class="bg-success">{{success}}</p>
  </div>
  <div ng-if="info != null">
    <p class="bg-info">{{info}}</p>
  </div>
  <div ng-if="warning != null">
    <p class="bg-warning">{{warning}}</p>
  </div>
  <div ng-if="danger != null">
    <p class="bg-danger">{{danger}}</p>
  </div>
</div>


var demoApp = angular.module('demoApp', []);

demoApp.controller("scopeCtrl", function ($scope, $rootScope) {
  $scope.types = ['success','info','warning','danger'];
  $scope.$on("globalAlert", function (event, args) {
    $scope[args.type] = args.msg;
  });
  $scope.alert = function (type, msg) {
    $rootScope.$broadcast("globalAlert", {
      type: type, msg: msg
    });
  }
});






















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