@rr0/cms/dist/DescriptionReplaceCommand.js

RR0 Content Management System (CMS)

/**
 * Adds an "abstract" HTML paragraph from a <meta name="description">, if any.
 */
export class DescriptionReplaceCommand {
    constructor(defaultDescription, abstractClass = "abstract") {
        this.defaultDescription = defaultDescription;
        this.abstractClass = abstractClass;
    }
    async execute(context) {
        const file = context.file;
        const inDescription = file.meta.description;
        const outDoc = file.document;
        let descriptionMeta = outDoc.head.querySelector("meta[name='description']");
        if (!descriptionMeta) {
            const existingAbstract = outDoc.querySelector(`.${this.abstractClass}`);
            let outDescription;
            if (existingAbstract) {
                outDescription = inDescription || existingAbstract.textContent.toString();
            }
            else if (inDescription) {
                const abstractFromDescription = outDoc.createElement("p");
                abstractFromDescription.className = this.abstractClass;
                abstractFromDescription.textContent = inDescription;
                const body = outDoc.body;
                body.insertBefore(abstractFromDescription, body.firstChild);
                outDescription = inDescription;
            }
            else {
                outDescription = this.defaultDescription;
            }
            outDescription = outDescription.replace(/\s{2,}/g, " ");
            file.meta.description = outDescription;
            const descriptionMeta = outDoc.createElement("meta");
            descriptionMeta.name = "description";
            descriptionMeta.content = file.meta.description;
            outDoc.head.append(descriptionMeta);
            const docType = outDoc.doctype ? `<!DOCTYPE ${outDoc.doctype.name}>` : "";
            context.file.contents = `${docType}${outDoc.documentElement.outerHTML}`;
        }
    }
    async contentStepEnd() {
        // NOP
    }
}