BetterDiscord - Prefill Image Upload Modal

imagenameprefill.plugin.js

//META{"name":"ImageNamePrefill"}*//

class ImageNamePrefill {
    getName() {return "ImageNamePrefill";} // Name of your plugin to show on the plugins page 
    getDescription() {return "Inserts the image file name as message in upload dialog.";} // Description to show on the plugins page 
    getVersion() {return "0.0.2";} // Current version. I recommend following semantic versioning <http://semver.org/> (e.g. 0.0.1)
    getAuthor() {return "Cholik";} // Your name

    debugOut(msg) {
        if(this.DEBUG) {
            console.log('[' + this.getName() + '] :: ' + msg);
        }   
    }

    load() {
        this.DEBUG = true;
        this.debugOut('Load - ' + this.getVersion());
    }

    start() {
        this.debugOut('Start');
    }

    stop() {
    }

    updateModal(modal) {
        var name = modal.querySelector('.da-filename').innerText;
        if(name.indexOf('[') > -1) {
            name = name.substring(0, name.indexOf('[')).trim();
        }
        document.execCommand("insertText", false, name);
    }

    observer(e) {
        if(e.addedNodes.length > 0) {
            if(e.addedNodes[0] instanceof HTMLElement) {
                var className = e.addedNodes[0].getAttribute('class');
                if(className != null && className.indexOf('da-modal') > -1) {
                    var modal = e.addedNodes[0].querySelector('.da-uploadModal');
    
                    if(modal !== null && modal.querySelector('.da-filename').innerText.startsWith('SPOILER_')) {
                        this.updateModal(modal);
                    }
                }
            }
        }
    }
}