caas-session.html

<link rel="import" href="../polymer/polymer.html">
<link rel="import" href="../app-storage/app-localstorage/app-localstorage-document.html">
<link rel="import" href="../iron-signals/iron-signals.html">
<!--
`caas-session`
Caas Session Element

@demo demo/index.html
-->

<dom-module id="caas-session">
  <template>

    <iron-signals
      on-iron-signal-caas-access-token="_setAccessToken"
      on-iron-signal-request-caas-access-token="_handleRequestAccessToken"
    ></iron-signals>

    <app-localstorage-document
      key="{{storageKey}}"
      data="{{_sessionData}}"
     ></app-localstorage-document>
   </template>

   <script>
		Polymer({
			is: 'caas-session',
			properties: {

				/**
				* The name of persistent localstorage key
				*/
				storageKey: {
					type: String,
					value: 'caas-session-data'
				},

				/**
				* Exposes the JSON Web token
				*/
				accessToken: {
					type: String,
					computed: '_computeAccessToken(_sessionData.accessToken)',
					notify: true,
				},

				/**
				* Exposes the raw JSON web token data
				*/
				tokenData: {
					type: Object,
					computed: '_parseJWT(accessToken)',
					notify: true,
				},

				assignedRoles: {
					type: Array,
					value: null,
					notify: true,
					computed: '_computeAssignedRoles(_sessionData.assignedRoles)'
				},

				roleDescriptions: {
					type: Array,
					value: null,
					notify: true,
					computed: '_computeRoleDescriptions(_sessionData.roleDescriptions)'
				},
				entrepreneur: {
					type: Boolean,
					notify: true,
					computed: 'isEntrepreneur(assignedRoles)',
				},
				entrepreneurId: {
					type: Number,
					value: null,
					notify: true,
					computed: 'getEntrepreneurId(assignedRoles)'
				},
				investor: {
					type: Boolean,
					value: false,
					notify: true,
					computed: 'isInvestor(assignedRoles)'
				},
				investorId: {
					type: Number,
					notify: true,
					computed: 'getInvestorId(assignedRoles)'
				},
				_sessionData: {
					type: Object,
					value: {}
				}
			},
			observers: [
				'_resetExpirationTimeOut(tokenData.exp)',
				'_broadcastAccessToken(accessToken, assignedRoles, roleDescriptions)'
			],

			destroy: function () {
				this.set('_sessionData.accessToken', null);
				this.set('_sessionData.assignedRoles', null);
				this.set('_sessionData.roleDescriptions', null);
			},

			_hasRole: function (assignedRoles, roleId) {
				for (var index = 0; index < assignedRoles.length; index++) {
					if (assignedRoles[index].roleId == roleId) { return true; }
				}
				return false;
			},

			isEntrepreneur(assignedRoles) {
				if (!assignedRoles) return false;
				return this._hasRole(assignedRoles, 2);
			},

			getEntrepreneurId(assignedRoles) {
				if (!assignedRoles) return false;
				for (var index = 0; index < assignedRoles.length; index++) {
					if (assignedRoles[index].roleId == 2) return assignedRoles[index].assignedRoleId;
				}
				return null;
			},

			isInvestor(assignedRoles) {
				if (!assignedRoles) return false;
				return this._hasRole(assignedRoles, 1);
			},

			getInvestorId(assignedRoles) {
				if (!assignedRoles) return false;
				for (var index = 0; index < assignedRoles.length; index++) {
					if (assignedRoles[index].roleId == 1) return assignedRoles[index].assignedRoleId;
				}
				return null;
			},

			_computeAccessToken(sessionAccessToken) {
				return sessionAccessToken;
			},

			_computeRoleDescriptions(roleDescriptions) {
				return roleDescriptions;
			},

			_computeAssignedRoles(assignedRoles) {
				return assignedRoles;
			},

			_parseJWT: function (accessToken) {
				if (!accessToken) return;
				var base64Url = accessToken.split('.')[1];
				var base64 = base64Url.replace('-', '+').replace('_', '/');
				return JSON.parse(window.atob(base64));
			},

			_setAccessToken: function (evt, detail) {
				this.set('_sessionData.accessToken', detail.accessToken);
				this.set('_sessionData.assignedRoles', detail.assignedRoles);
				this.set('_sessionData.roleDescriptions', detail.roleDescriptions);
			},

			_handleRequestAccessToken: function () {
				this.fire('iron-signal', {
					name: 'caas-access-token',
					data: {
						accessToken: this.accessToken,
						assignedRoles: this.assignedRoles,
						roleDescriptions: this.roleDescriptions
					}
				});
			},

			_broadcastAccessToken: function (accessToken, assignedRoles, roleDescriptions) {
				var caasSessionData = JSON.parse(window.localStorage['caas-session-data']);
				if (caasSessionData.accessToken != null && caasSessionData.assignedRoles != null && caasSessionData.roleDescriptions != null) {
					return this.fire('iron-signal', {
						name: 'caas-access-token',
						data: {
							accessToken: accessToken,
							assignedRoles: assignedRoles,
							roleDescriptions: roleDescriptions
						}
					});
				}
			},

			_resetExpirationTimeOut: function (tokenExpirationTime) {
				var currentTime = Math.round(Date.now() / 1000) + 3608;
				var timeLeft = (tokenExpirationTime - currentTime) * 1000;
				window.setTimeout((function () {
					this.destroy();
				}).bind(this), timeLeft);
			}
		});
	</script>
</dom-module>