Ghost/ghost/admin/app/components/modal-post-preview/social.js

import Component from '@glimmer/component';
import {
    IMAGE_EXTENSIONS,
    IMAGE_MIME_TYPES
} from 'ghost-admin/components/gh-image-uploader';
import {action} from '@ember/object';
import {inject as service} from '@ember/service';
import {tracked} from '@glimmer/tracking';
export default class ModalPostPreviewSocialComponent extends Component {
    @service config;
    @service settings;
    @service ghostPaths;

    @tracked editingFacebookTitle = false;
    @tracked editingFacebookDescription = false;
    @tracked editingTwitterTitle = false;
    @tracked editingTwitterDescription = false;
    @tracked editingMetaTitle = false;
    @tracked editingMetaDescription = false;

    imageExtensions = IMAGE_EXTENSIONS;
    imageMimeTypes = IMAGE_MIME_TYPES;

    get _fallbackDescription() {
        return this.args.post.customExcerpt ||
            this.serpDescription ||
            this.settings.get('description');
    }

    @action
    blurElement(event) {
        if (!event.shiftKey) {
            event.preventDefault();
            event.target.blur();
        }
    }

    @action
    triggerFileDialog(name) {
        const input = document.querySelector(`#${name}FileInput input`);
        if (input) {
            input.click();
        }
    }

    // SERP

    get serpTitle() {
        return this.args.post.metaTitle || this.args.post.title || '(Untitled)';
    }

    get serpURL() {
        const blogUrl = this.config.get('blogUrl');
        const seoSlug = this.args.post.slug || '';
        const canonicalUrl = this.args.post.canonicalUrl || '';

        if (canonicalUrl) {
            if (canonicalUrl.match(/^\//)) {
                return `${blogUrl}${canonicalUrl}`;
            } else {
                return canonicalUrl;
            }
        } else {
            const seoURL = `${blogUrl}/${seoSlug}`;

            // only append a slash to the URL if the slug exists
            if (seoSlug) {
                return `${seoURL}/`;
            }

            return seoURL;
        }
    }

    get serpDescription() {
        return this.args.post.metaDescription || this.args.post.excerpt;
    }

    @action
    editMetaTitle() {
        this.editingMetaTitle = true;
    }

    @action
    setMetaTitle(event) {
        const title = event.target.value;
        this.args.post.metaTitle = title.trim();
        this.args.post.save();
        this.editingMetaTitle = false;
    }

    @action
    editMetaDescription() {
        this.editingMetaDescription = true;
    }

    @action
    setMetaDescription(event) {
        const description = event.target.value;
        this.args.post.metaDescription = description.trim();
        this.args.post.save();
        this.editingMetaDescription = false;
    }

    // Facebook

    get facebookTitle() {
        return this.args.post.ogTitle || this.serpTitle;
    }

    get facebookDescription() {
        return this.args.post.ogDescription || this._fallbackDescription;
    }

    get facebookImage() {
        return this.args.post.ogImage || this.args.post.featureImage || this.settings.get('ogImage') || this.settings.get('coverImage');
    }

    @action
    editFacebookTitle() {
        this.editingFacebookTitle = true;
    }

    @action
    cancelEdit(property, event) {
        event.preventDefault();
        event.target.value = this.args.post[property];
        event.target.blur();
    }

    @action
    setFacebookTitle(event) {
        const title = event.target.value;
        this.args.post.ogTitle = title.trim();
        this.args.post.save();
        this.editingFacebookTitle = false;
    }

    @action
    editFacebookDescription() {
        this.editingFacebookDescription = true;
    }

    @action
    setFacebookDescription() {
        const description = event.target.value;
        this.args.post.ogDescription = description.trim();
        this.args.post.save();
        this.editingFacebookDescription = false;
    }

    @action
    setFacebookImage([image]) {
        this.args.post.ogImage = image.url;
        this.args.post.save();
    }

    @action
    clearFacebookImage() {
        this.args.post.ogImage = null;
        this.args.post.save();
    }

    // Twitter

    get twitterTitle() {
        return this.args.post.twitterTitle || this.serpTitle;
    }

    get twitterDescription() {
        return this.args.post.twitterDescription || this._fallbackDescription;
    }

    get twitterImage() {
        return this.args.post.twitterImage || this.args.post.featureImage || this.settings.get('twitterImage') || this.settings.get('coverImage');
    }

    @action
    editTwitterTitle() {
        this.editingTwitterTitle = true;
    }

    @action
    setTwitterTitle(event) {
        const title = event.target.value;
        this.args.post.twitterTitle = title.trim();
        this.args.post.save();
        this.editingTwitterTitle = false;
    }

    @action
    editTwitterDescription() {
        this.editingTwitterDescription = true;
    }

    @action
    setTwitterDescription() {
        const description = event.target.value;
        this.args.post.twitterDescription = description.trim();
        this.args.post.save();
        this.editingTwitterDescription = false;
    }

    @action
    setTwitterImage([image]) {
        this.args.post.twitterImage = image.url;
        this.args.post.save();
    }

    @action
    clearTwitterImage() {
        this.args.post.twitterImage = null;
        this.args.post.save();
    }
}