消息栏

<template>
  <div class="page">
    <div class="navbar">
      <div class="navbar-bg"></div>
      <div class="navbar-inner sliding">
        <div class="title">Messages</div>
      </div>
    </div>
    <div class="toolbar messagebar" @messagebar:attachmentdelete=${deleteAttachment}>
      <div class="toolbar-inner">
        <a class="link icon-only" @click=${sheetToggle}>
          <i class="icon f7-icons if-not-md">camera_fill</i>
          <i class="icon material-icons md-only">camera_alt</i>
        </a>
        <div class="messagebar-area">
          <textarea class="resizable" placeholder="Message"></textarea>
        </div>
        <a class="link icon-only demo-send-message-link" @click=${sendMessage}>
          <i class="icon f7-icons if-not-md">arrow_up_circle_fill</i>
          <i class="icon material-icons md-only">send</i>
        </a>
      </div>
      <div class="messagebar-sheet">
        ${images.map((image) => $h`
        <label class="checkbox messagebar-sheet-image" @change=${handleAttachment}>
          <input type="checkbox" />
          <i class="icon icon-checkbox"></i>
          <img src=${image} />
        </label>
        `)}
      </div>
    </div>
    <div class="page-content messages-content">
      <div class="messages">
        <div class="messages-title"><b>Sunday, Feb 9,</b> 12:58</div>
        <div class="message message-sent">
          <div class="message-content">
            <div class="message-bubble">
              <div class="message-text">Hi, Kate</div>
            </div>
          </div>
        </div>
        <div class="message message-sent">
          <div class="message-content">
            <div class="message-bubble">
              <div class="message-text">How are you?</div>
            </div>
          </div>
        </div>
        <div class="message message-received">
          <div class="message-avatar"
            style="background-image:url(https://cdn.framework7.io/placeholder/people-100x100-9.jpg)"></div>
          <div class="message-content">
            <div class="message-name">Kate</div>
            <div class="message-bubble">
              <div class="message-text">Hi, I am good!</div>
            </div>
          </div>
        </div>
        <div class="message message-received">
          <div class="message-avatar"
            style="background-image:url(https://cdn.framework7.io/placeholder/people-100x100-7.jpg)"></div>
          <div class="message-content">
            <div class="message-name">Blue Ninja</div>
            <div class="message-bubble">
              <div class="message-text">Hi there, I am also fine, thanks! And how are you?</div>
            </div>
          </div>
        </div>
        <div class="message message-sent">
          <div class="message-content">
            <div class="message-bubble">
              <div class="message-text">Hey, Blue Ninja! Glad to see you ;)</div>
            </div>
          </div>
        </div>
        <div class="message message-sent">
          <div class="message-content">
            <div class="message-bubble">
              <div class="message-text">Hey, look, cutest kitten ever!</div>
            </div>
          </div>
        </div>
        <div class="message message-sent">
          <div class="message-content">
            <div class="message-bubble">
              <div class="message-image">
                <img src="https://cdn.framework7.io/placeholder/cats-200x260-4.jpg"
                  style="width:200px; height: 260px" />
              </div>
            </div>
          </div>
        </div>
        <div class="message message-received">
          <div class="message-avatar"
            style="background-image:url(https://cdn.framework7.io/placeholder/people-100x100-9.jpg)"></div>
          <div class="message-content">
            <div class="message-name">Kate</div>
            <div class="message-bubble">
              <div class="message-text">Nice!</div>
            </div>
          </div>
        </div>
        <div class="message message-received">
          <div class="message-avatar"
            style="background-image:url(https://cdn.framework7.io/placeholder/people-100x100-9.jpg)"></div>
          <div class="message-content">
            <div class="message-name">Kate</div>
            <div class="message-bubble">
              <div class="message-text">Like it very much!</div>
            </div>
          </div>
        </div>
        <div class="message message-received">
          <div class="message-avatar"
            style="background-image:url(https://cdn.framework7.io/placeholder/people-100x100-7.jpg)"></div>
          <div class="message-content">
            <div class="message-name">Blue Ninja</div>
            <div class="message-bubble">
              <div class="message-text">Awesome!</div>
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>
</template>
<script>
  export default (props, { $f7, $el, $on, $ }) => {
    const images = [
      'https://cdn.framework7.io/placeholder/cats-300x300-1.jpg',
      'https://cdn.framework7.io/placeholder/cats-200x300-2.jpg',
      'https://cdn.framework7.io/placeholder/cats-400x300-3.jpg',
      'https://cdn.framework7.io/placeholder/cats-300x150-4.jpg',
      'https://cdn.framework7.io/placeholder/cats-150x300-5.jpg',
      'https://cdn.framework7.io/placeholder/cats-300x300-6.jpg',
      'https://cdn.framework7.io/placeholder/cats-300x300-7.jpg',
      'https://cdn.framework7.io/placeholder/cats-200x300-8.jpg',
      'https://cdn.framework7.io/placeholder/cats-400x300-9.jpg',
      'https://cdn.framework7.io/placeholder/cats-300x150-10.jpg'
    ];
    const people = [
      {
        name: 'Kate Johnson',
        avatar: 'https://cdn.framework7.io/placeholder/people-100x100-9.jpg'
      },
      {
        name: 'Blue Ninja',
        avatar: 'https://cdn.framework7.io/placeholder/people-100x100-7.jpg'
      },
    ];
    const answers = [
      'Yes!',
      'No',
      'Hm...',
      'I am not sure',
      'And what about you?',
      'May be ;)',
      'Lorem ipsum dolor sit amet, consectetur',
      'What?',
      'Are you sure?',
      'Of course',
      'Need to think about it',
      'Amazing!!!',
    ];

    let responseInProgress = false;
    let messagebar;
    let messages;

    const sheetToggle = () => {
      messagebar.sheetToggle();
    }
    const deleteAttachment = (e, index) => {
      var image = messagebar.attachments.splice(index, 1)[0];
      messagebar.renderAttachments();
      checkAttachments();
      // Uncheck in sheet
      var imageIndex = images.indexOf(image);
      $el.value.find('.messagebar-sheet .checkbox').eq(imageIndex).find('input').prop('checked', false);
    }
    const handleAttachment = (e) => {
      var index = $(e.target).parents('label.checkbox').index();
      var image = images[index];
      if (e.target.checked) {
        // Add to attachments
        messagebar.attachments.unshift(image)
      } else {
        // Remove from attachments
        messagebar.attachments.splice(messagebar.attachments.indexOf(image), 1);
      }
      messagebar.renderAttachments();
      checkAttachments();
    }
    const checkAttachments = () => {
      if (messagebar.attachments.length > 0) {
        messagebar.attachmentsShow();
        messagebar.setPlaceholder('Add comment or Send');
      } else {
        messagebar.attachmentsHide();
        messagebar.setPlaceholder('Message');
      }
    }
    const sendMessage = () => {
      var text = messagebar.getValue().replace(/\n/g, '<br />').trim();
      var messagesToSend = [];
      messagebar.attachments.forEach(function (attachment) {
        var size = attachment.split('placeholder/cats-')[1].split('-')[0].split('x');
        messagesToSend.push({
          image: '<img src="' + attachment + '" style="width: ' + (size[0] / 2) + 'px; height: ' + (size[1] / 2) + 'px">'
        });
      });
      if (text.trim().length) {
        messagesToSend.push({
          text: text
        });
      }
      // Reset attachments
      messagebar.attachments = [];
      checkAttachments();
      // Hide sheet
      messagebar.sheetHide();
      // Uncheck selected images in sheet
      messagebar.$sheetEl.find('input').prop('checked', false);
      // Clear area
      messagebar.clear();
      // Focus area
      if (text.length) messagebar.focus();
      // Exit when nothing to send
      if (!messagesToSend.length) return;
      // Send message
      messages.addMessages(messagesToSend);

      // Mock response
      if (responseInProgress) return;
      responseInProgress = true;
      setTimeout(function () {
        var answer = answers[Math.floor(Math.random() * answers.length)];
        var person = people[Math.floor(Math.random() * people.length)];
        messages.showTyping({
          header: person.name + ' is typing',
          avatar: person.avatar
        });
        setTimeout(function () {
          messages.addMessage({
            text: answer,
            type: 'received',
            name: person.name,
            avatar: person.avatar
          });
          messages.hideTyping();
          responseInProgress = false;
        }, 4000);
      }, 1000);
    }

    $on('pageInit', () => {
      messagebar = $f7.messagebar.create({
        el: $el.value.find('.messagebar'),
        attachments: []
      });
      messages = $f7.messages.create({
        el: $el.value.find('.messages'),
        firstMessageRule: function (message, previousMessage, nextMessage) {
          if (message.isTitle) return false;
          if (!previousMessage || previousMessage.type !== message.type || previousMessage.name !== message.name) return true;
          return false;
        },
        lastMessageRule: function (message, previousMessage, nextMessage) {
          if (message.isTitle) return false;
          if (!nextMessage || nextMessage.type !== message.type || nextMessage.name !== message.name) return true;
          return false;
        },
        tailMessageRule: function (message, previousMessage, nextMessage) {
          if (message.isTitle) return false;
          if (!nextMessage || nextMessage.type !== message.type || nextMessage.name !== message.name) return true;
          return false;
        }
      });
    })
    $on('pageBeforeRemove', () => {
      messagebar.destroy()
      messages.destroy()
    })



    return $render;
  };

</script>