refactor(app): move storidge to new 'integrations' module (#2905)

* refactor(app): move storidge to new 'integrations' module

* style(storidge): revert TODO note removal

app/integrations/storidge/services/snapshotService.js

@@ -0,0 +1,80 @@
+import { StoridgeSnapshotModel } from '../models/snapshot'
+
+angular.module('portainer.integrations.storidge')
+.factory('StoridgeSnapshotService', ['$q', 'Storidge', function StoridgeSnapshotServiceFactory($q, Storidge) {
+  'use strict';
+  var service = {};
+
+  service.snapshots = snapshots;
+  service.snapshot = snapshot;
+  service.create = create;
+  service.remove = remove;
+
+  function snapshots(volumeId) {
+    var deferred = $q.defer();
+
+    Storidge.querySnapshots({id: volumeId}).$promise
+    .then(function success(data) {
+      var snapshotsData = data.snapshots;
+      let snapshotsArray = [];
+      for (const key in snapshotsData) {
+        if (snapshotsData.hasOwnProperty(key)) {
+          snapshotsArray.push(snapshotsData[key]);
+        }
+      }
+      var snapshots = snapshotsArray.map(function (snapshot) {
+        return new StoridgeSnapshotModel(snapshot);
+      });
+      deferred.resolve(snapshots);
+    })
+    .catch(function error(err) {
+      deferred.reject({ msg: 'Unable to retrieve Storidge snapshots', err: err });
+    });
+
+    return deferred.promise;
+  }
+
+  function snapshot(id) {
+    var deferred = $q.defer();
+
+    Storidge.getSnapshot({id:id}).$promise
+    .then(function success(data) {
+      var snapshot = new StoridgeSnapshotModel(data.snapshot);
+      deferred.resolve(snapshot);
+    })
+    .catch(function error(err) {
+      deferred.reject({ msg: 'Unable to retrieve Storidge snapshot', err: err });
+    });
+
+    return deferred.promise;
+  }
+  
+  function create(volumeId, description) {
+    var deferred = $q.defer();
+    Storidge.createSnapshot({id: volumeId, opts: {description: description}}).$promise
+    .then(function success(data) {
+      deferred.resolve(data);
+    })
+    .catch(function error(err) {
+      deferred.reject({ msg: 'Unable to create Storidge volume snapshot', err: err });
+    });
+
+    return deferred.promise;
+  }
+
+  function remove(id) {
+    var deferred = $q.defer();
+
+    Storidge.removeSnapshot({ id: id }).$promise
+    .then(function success() {
+      deferred.resolve();
+    })
+    .catch(function error(err) {
+      deferred.reject({ msg: 'Unable to remove Storidge volume snapshot', err: err });
+    });
+
+    return deferred.promise;
+  }
+
+  return service;
+}]);