happy-dom-without-node/lib/console/utilities/VirtualConsoleLogEntryStringifier.js

Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. It includes many web standards from WHATWG DOM and HTML.

import VirtualConsoleLogTypeEnum from '../enums/VirtualConsoleLogTypeEnum.js';
/**
 * Virtual console utility.
 */
export default class VirtualConsoleLogEntryStringifier {
    /**
     * Stringifies a log entry.
     *
     * @param logEntry Log entry.
     * @returns Stringified message.
     */
    static toString(logEntry) {
        if (this.isLogEntryCollapsed(logEntry)) {
            return '';
        }
        const tabbing = this.getLogEntryGroupTabbing(logEntry);
        let output = tabbing;
        for (const part of logEntry.message) {
            output += output !== '' && output !== tabbing ? ' ' : '';
            if (typeof part === 'object' &&
                (part === null || part.constructor.name === 'Object' || Array.isArray(part))) {
                try {
                    output += JSON.stringify(part);
                }
                catch (error) {
                    output += new Error('Failed to JSON stringify object in log entry.').stack.replace(/\n    at/gm, '\n    ' + tabbing + 'at');
                }
            }
            else if (typeof part === 'object' && part['message'] && part['stack']) {
                output += part['stack'].replace(/\n    at/gm, '\n    ' + tabbing + 'at');
            }
            else {
                output += this.getLogEntryIcon(logEntry) + String(part);
            }
        }
        return output + '\n';
    }
    /**
     * Gets the log entry icon.
     *
     * @param logEntry Log entry.
     * @returns Icon.
     */
    static getLogEntryIcon(logEntry) {
        switch (logEntry.type) {
            case VirtualConsoleLogTypeEnum.group:
                return '▼ ';
            case VirtualConsoleLogTypeEnum.groupCollapsed:
                return '▶ ';
        }
        return '';
    }
    /**
     * Gets the log entry group tabbing.
     *
     * @param logEntry Log entry.
     * @returns Tabbing.
     */
    static getLogEntryGroupTabbing(logEntry) {
        let tabs = '';
        let group = logEntry.type === VirtualConsoleLogTypeEnum.group ||
            logEntry.type === VirtualConsoleLogTypeEnum.groupCollapsed
            ? logEntry.group?.parent
            : logEntry.group;
        while (group) {
            tabs += '  ';
            group = group.parent;
        }
        return tabs;
    }
    /**
     * Checks if the log entry content is collapsed.
     *
     * @param logEntry Log entry.
     * @returns True if collapsed.
     */
    static isLogEntryCollapsed(logEntry) {
        let group = logEntry.type === VirtualConsoleLogTypeEnum.group ||
            logEntry.type === VirtualConsoleLogTypeEnum.groupCollapsed
            ? logEntry.group?.parent
            : logEntry.group;
        while (group) {
            if (group.collapsed) {
                return true;
            }
            group = group.parent;
        }
        return false;
    }
}
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