converse.js/src/shared/chat/message-history.js

import { html } from 'lit';
import { repeat } from 'lit/directives/repeat.js';
import { until } from 'lit/directives/until.js';
import { api } from "@converse/headless";
import { CustomElement } from 'shared/components/element.js';
import { getDayIndicator } from './utils.js';
import "./message";


export default class MessageHistory extends CustomElement {
    /**
     * @typedef {import('@converse/headless/types/plugins/chat/message').default} Message
     */

    constructor () {
        super();
        this.model = null;
        this.messages = [];
    }

    static get properties () {
        return {
            model: { type: Object },
            messages: { type: Array }
        }
    }

    render () {
        const msgs = this.messages;
        if (msgs.length) {
            return repeat(msgs, m => m.get('id'), m => html`${this.renderMessage(m)}`)
        } else {
            return '';
        }
    }

    /**
     * @param {(Message)} model
     */
    renderMessage (model) {
        if (model.get('dangling_retraction') || model.get('dangling_moderation') ||  model.get('is_only_key')) {
            return '';
        }
        const template_hook = model.get('template_hook')
        if (typeof template_hook === 'string') {
            const template_promise = api.hook(template_hook, model, '');
            return until(template_promise, '');
        } else {
            const template = html`<converse-chat-message
                .model_with_messages=${this.model}
                .model=${model}></converse-chat-message>`
            const day = getDayIndicator(model);
            return day ? [day, template] : template;
        }
    }
}

api.elements.define('converse-message-history', MessageHistory);