Add ability to receive new messages.

Signed-off-by: Marco Ambrosini <marcoambrosini@pm.me>

src/components/MessagesList/MessageBody/MessageBody.vue

@@ -19,11 +19,16 @@
   - along with this program. If not, see <http://www.gnu.org/licenses/>.
 -->
 
+<docs>
+This component displays the text inside the message component and can be used for
+the main body of the message as well as a quote.
+</docs>
+
 <template>
 	<div v-show="message"
 		:class="{ 'message-main--quote' : isQuote }"
 		class="message-main">
-		<div class="message-main-header">
+		<div v-if="showAuthor" class="message-main-header">
 			<h6>{{ actorDisplayName }}</h6>
 		</div>
 		<slot />
@@ -37,23 +42,34 @@
 export default {
 	inheritAttrs: false,
 	props: {
+		/**
+		 * The sender of the message.
+		 */
 		actorDisplayName: {
 			type: String,
 			required: true
 		},
+		/**
+		 * The message or quote text.
+		 */
 		message: {
 			type: String,
 			required: true
 		},
-		isFirstMessage: {
+		/**
+		 * if true, it displays the message author on top of the message.
+		 */
+		showAuthor: {
+			type: Boolean,
+			default: true
+		},
+		/**
+		 * Style the message as a quote.
+		 */
+		isQuote: {
 			type: Boolean,
 			default: false
 		}
-	},
-	computed: {
-		isQuote() {
-			return !!this.$parent.messageText
-		}
 	}
 }
 </script>
@@ -74,13 +90,13 @@ export default {
         flex-direction: column;
 		font-size: 20;
 		&-header {
-			color: #989898;
+			color: var(--color-text-maxcontrast);
 		}
 		&-text {
-			color: #444444;
+			color: var(--color-text-light);
 		}
 		&--quote {
-			border-left: 4px solid rgb(59, 59, 59);
+			border-left: 4px solid var(--color-primary);
 			padding: 4px 0 0 8px;
 		}
 	}

src/components/MessagesList/MessagesList.vue

@@ -18,6 +18,14 @@
   - You should have received a copy of the GNU Affero General Public License
   - along with this program. If not, see <http://www.gnu.org/licenses/>.
 -->
+<docs>
+
+This component is a wrapper for the list of messages. It's main purpose it to
+get the messagesList array and loop through the list to generate the messages.
+In order not to render each and every messages that is in the store, we use
+the DynamicScroller component, whose docs you can find [here.](https://github.com/Akryum/vue-virtual-scroller#dynamicscroller)
+
+</docs>
 
 <template>
 	<DynamicScroller
@@ -47,7 +55,7 @@ import { DynamicScroller, DynamicScrollerItem } from 'vue-virtual-scroller/dist/
 import 'vue-virtual-scroller/dist/vue-virtual-scroller.css'
 import Message from './Message/Message'
 import MessageBody from './MessageBody/MessageBody'
-import { fetchMessages } from '../../services/messagesService'
+import { fetchMessages, lookForNewMessges } from '../../services/messagesService'
 
 export default {
 	name: 'MessagesList',
@@ -57,6 +65,7 @@ export default {
 		Message,
 		MessageBody
 	},
+
 	props: {
 		/**
 		 * The conversation token.
@@ -66,34 +75,45 @@ export default {
 			required: true
 		}
 	},
+
 	data: function() {
 		return {
+			/**
+			 * Keeps track of the state of the component in order to trigger the scroll to
+			 * bottom.
+			 */
 			isInitiated: false
 		}
 	},
+
 	computed: {
 		/**
-		 * Gets the messages array.
+		 * Gets the messages array. We need this because the DynamicScroller needs an array to
+		 * loop through.
 		 *
-		 * @returns {Array}
+		 * @returns {array}
 		 */
 		messagesList() {
 			return this.$store.getters.messagesList(this.token)
 		},
 		/**
-		 * Gets the messages object.
+		 * Gets the messages object, which is structured so that the key of each message element
+		 * corresponds to the id of the message, and makes it easy and efficient to access the
+		 * individual message object.
 		 *
-		 * @returns {Object}
+		 * @returns {object}
 		 */
 		messages() {
 			return this.$store.getters.messages(this.token)
 		}
 	},
+
 	watch: {
 		token: function() {
 			this.onTokenChange()
 		}
 	},
+
 	/**
 	 * Fetches the messages when the MessageList is mounted for the
 	 * first time. The router mounts this component only if the token
@@ -102,37 +122,71 @@ export default {
 	beforeMount() {
 		this.onTokenChange()
 	},
+
 	beforeUpdate() {
+		/**
+		 * If the component is not initiated, scroll to the bottom of the message list.
+		 */
 		if (!this.isInitiated) {
+			this.scrollToBottom()
+			this.isInitiated = true
+		}
+	},
 
-			// Scrolls to the bottom of the message list.
+	methods: {
 
+		/**
+		 * Fetches the messaes of a conversation given the
+		 * conversation token.
+		 */
+		async onTokenChange() {
+			this.isInitiated = false
+			const messages = await fetchMessages(this.token)
+			// Process each messages and adds it to the store
+			messages.data.ocs.data.forEach(message => {
+				this.$store.dispatch('processMessage', message)
+			})
+			// After loading the old messages to the store, we start looking for new mwssages.
+			this.getNewMessages()
+		},
+
+		/**
+		 * Creates a long polling request for a new message.
+		 */
+		async getNewMessages() {
+			const lastKnownMessageId = this.messagesList[this.messagesList.length - 1].id
+			const messages = await lookForNewMessges(this.token, lastKnownMessageId)
+			// If there are no new messages, the variable messages will be undefined.
+			if (messages !== undefined) {
+				// Process each messages and adds it to the store
+				messages.data.ocs.data.forEach(message => {
+					this.$store.dispatch('processMessage', message)
+				})
+				this.scrollToBottom()
+			}
+			/**
+			 * This method recursively call itself after a response, so we're always
+			 * looking for new messages.
+			 */
+			this.getNewMessages()
+		},
+
+		/**
+		 * Dispatches the deleteMessages action.
+		 * @param {object} event The deleteMessage event emitted by the Message component.
+		 */
+		handleDeleteMessage(event) {
+			this.$store.dispatch('deleteMessage', event.message)
+		},
+		/**
+		 * Scrolls to the bottom of the list.
+		 */
+		scrollToBottom() {
 			this.$nextTick(function() {
 				document.querySelector('.scroller').scrollTop = document.querySelector('.scroller').scrollHeight
 			})
-			this.isInitiated = true
 		}
 
-	},
-	methods: {
-		async onTokenChange() {
-			this.isInitiated = false
-			/**
-			 * Fetches the messaes of a conversation given the
-			 * conversation token.
-			 */
-			const messages = await fetchMessages(this.token)
-			messages.data.ocs.data.forEach(message => {
-				// Process each messages and adds it to the store
-				this.$store.dispatch('processMessage', message)
-			})
-		},
-		scrollToEnd: function() {
-			this.$el.scrollTop = this.$el.scrollHeight
-		},
-		handleDeleteMessage(event) {
-			this.$store.dispatch('deleteMessage', event.message)
-		}
 	}
 }
 </script>

src/components/Navigation/ContactsList/ContactsList.vue

@@ -59,7 +59,7 @@ export default {
 	methods: {
 		/**
 		 * Create a new conversation with the selected user.
-		 * @param {String} userId the ID of the clicked user.
+		 * @param {string} userId the ID of the clicked user.
 		 */
 		async createAndJoinConversation(userId) {
 			console.debug(userId)

src/components/Navigation/ConversationsList/ConversationsList.vue

@@ -101,7 +101,7 @@ export default {
 		},
 		/**
 		 * Deletes the current user from the conversation.
-		 * @param {String} token The token of the conversation to be left.
+		 * @param {string} token The token of the conversation to be left.
 		 */
 		async deleteConversation(token) {
 			const response = await removeCurrentUserFromConversation(token)

src/components/NewMessageForm/AdvancedInput/AdvancedInput.vue

@@ -74,7 +74,7 @@ export default {
 		 * at the v-on in the template) unless shift is pressed:
 		 * in this case a new line will be created.
 		 *
-		 * @param {Object} event the event object;
+		 * @param {object} event the event object;
 		 */
 		handleKeydown(event) {
 			// TODO: add support for CTRL+ENTER new line

src/services/conversationsService.js

@@ -37,7 +37,7 @@ const fetchConversations = async function() {
 
 /**
  * Fetch possible conversations
- * @param {String} searchText The string that will be used in the search query.
+ * @param {string} searchText The string that will be used in the search query.
  */
 const searchPossibleConversations = async function(searchText) {
 	try {
@@ -50,7 +50,7 @@ const searchPossibleConversations = async function(searchText) {
 
 /**
  * Create a new one to one conversation with the specified user.
- * @param {String} userId The ID of the user with wich the new conversation will be opened.
+ * @param {string} userId The ID of the user with wich the new conversation will be opened.
  */
 const createOneToOneConversation = async function(userId) {
 	try {
@@ -63,7 +63,7 @@ const createOneToOneConversation = async function(userId) {
 
 /**
  * Create a new group conversation.
- * @param {String} groupId The group ID, this parameter is optional.
+ * @param {string} groupId The group ID, this parameter is optional.
  */
 const createGroupConversation = async function(groupId) {
 	try {
@@ -76,7 +76,7 @@ const createGroupConversation = async function(groupId) {
 
 /**
  * Delete a conversation.
- * @param {String} token The token of the conversation to be deleted.
+ * @param {string} token The token of the conversation to be deleted.
  */
 const deleteConversation = async function(token) {
 	try {

src/services/messagesService.js

@@ -38,12 +38,28 @@ const fetchMessages = async function(token) {
 	}
 }
 
+/**
+ * Fetches newly created messages that belong to a particular conversation
+ * specified with its token.
+ *
+ * @param {string} token The conversation token;
+ * @param {int} lastKnownMessageId The id of the last message in the store.
+ */
+const lookForNewMessges = async function(token, lastKnownMessageId) {
+	try {
+		const response = await axios.get(generateOcsUrl('apps/spreed/api/v1/chat', 2) + token + '?lookIntoFuture=1' + '&includeLastKnown=0' + `&lastKnownMessageId=${lastKnownMessageId}`)
+		return response
+	} catch (error) {
+		console.debug('Error while looking for new message: ', error)
+	}
+}
+
 /**
  * Posts a new messageto the server.
  *
- * @param {Object} param0 The message object that is destructured;
- * @param {String} token The conversation token;
- * @param {Object} message The message object.
+ * @param {object} param0 The message object that is destructured;
+ * @param {string} token The conversation token;
+ * @param {object} message The message object.
  */
 const postNewMessage = async function({ token, message }) {
 	try {
@@ -54,4 +70,8 @@ const postNewMessage = async function({ token, message }) {
 	}
 }
 
-export { fetchMessages, postNewMessage }
+export {
+	fetchMessages,
+	lookForNewMessges,
+	postNewMessage
+}

src/services/participantsService.js

@@ -27,7 +27,7 @@ import { generateOcsUrl } from 'nextcloud-router'
  * Joins the current user to a conversation specified with
  * the token.
  *
- * @param {String} token The conversation token;
+ * @param {string} token The conversation token;
  */
 const joinConversation = async function(token) {
 	try {
@@ -41,7 +41,7 @@ const joinConversation = async function(token) {
 /**
  * Leaves the conversation specified with the token.
  *
- * @param {String} token The conversation token;
+ * @param {string} token The conversation token;
  */
 const leaveConversation = async function(token) {
 	try {
@@ -55,7 +55,7 @@ const leaveConversation = async function(token) {
 /**
  * Removes the the current user from the conversation specified with the token.
  *
- * @param {String} token The conversation token;
+ * @param {string} token The conversation token;
  */
 const removeCurrentUserFromConversation = async function(token) {
 	try {

src/store/conversations.js

@@ -37,8 +37,8 @@ const mutations = {
 	/**
      * Adds a conversation to the store.
 	 *
-     * @param {Object} state current store state;
-     * @param {Object} conversation the conversation;
+     * @param {object} state current store state;
+     * @param {object} conversation the conversation;
      */
 	addConversation(state, conversation) {
 		Vue.set(state.conversations, conversation.id, conversation)
@@ -47,8 +47,8 @@ const mutations = {
      * Creates a key-value pair with conversation id and name
 	 * respectively.
 	 *
-     * @param {Object} state current state object;
-     * @param {Object} object destructuring object;
+     * @param {object} state current state object;
+     * @param {object} object destructuring object;
      * @param {int} object.id conversation id;
      * @param {string} object.displayName conversation name;
      */
@@ -61,8 +61,8 @@ const actions = {
 	/**
      * Add a conversation to the store and index the displayname.
 	 *
-     * @param {Object} context default store context;
-     * @param {Object} conversation the conversation;
+     * @param {object} context default store context;
+     * @param {object} conversation the conversation;
      */
 	addConversation(context, conversation) {
 		context.commit('addConversation', conversation)

src/store/messages.js

@@ -44,8 +44,8 @@ const getters = {
 const mutations = {
 	/**
      * Adds a message to the store.
-     * @param {Object} state current store state;
-     * @param {Object} message the message;
+     * @param {object} state current store state;
+     * @param {object} message the message;
      */
 	addMessage(state, message) {
 		if (!state.messages[message.token]) {
@@ -55,16 +55,16 @@ const mutations = {
 	},
 	/**
      * Deletes a message from the store.
-     * @param {Object} state current store state;
-     * @param {Object} message the message;
+     * @param {object} state current store state;
+     * @param {object} message the message;
      */
 	deleteMessage(state, message) {
 		Vue.delete(state.messages[message.token], message.id)
 	},
 	/**
      * Adds a temporary message to the store.
-     * @param {Object} state current store state;
-     * @param {Object} message the temporary message;
+     * @param {object} state current store state;
+     * @param {object} message the temporary message;
      */
 	addTemporaryMessage(state, message) {
 		Vue.set(state.messages[message.token], message.id, message)
@@ -72,14 +72,15 @@ const mutations = {
 }
 
 const actions = {
+
 	/**
 	 * Adds message to the store.
 	 *
 	 * If the message has a parent message object,
 	 * first it adds the parent to the store.
 	 *
-     * @param {Object} context default store context;
-	 * @param {Object} message the message;
+     * @param {object} context default store context;
+	 * @param {object} message the message;
      */
 	processMessage(context, message) {
 		if (message.parent) {
@@ -88,22 +89,24 @@ const actions = {
 		}
 		context.commit('addMessage', message)
 	},
+
 	/**
      * Delete a message
 	 *
-     * @param {Object} context default store context;
-     * @param {String} message the message to be deleted;
+     * @param {object} context default store context;
+     * @param {string} message the message to be deleted;
      */
 	deleteMessage(context, message) {
 		context.commit('deleteMessage', message)
 	},
+
 	/**
      * Add a temporary message generated in the client to
 	 * the store, these messages are deleted once the full
 	 * message object is recived from the server.
 	 *
-     * @param {Object} context default store context;
-	 * @param {Object} message the temporary message;
+     * @param {object} context default store context;
+	 * @param {object} message the temporary message;
      */
 	addTemporaryMessage(context, message) {
 		context.commit('addTemporaryMessage', message)