ljm_j1/JitsiTrackError.js

import * as JitsiTrackErrors from "./JitsiTrackErrors";

const TRACK_ERROR_TO_MESSAGE_MAP = {};

TRACK_ERROR_TO_MESSAGE_MAP[JitsiTrackErrors.UNSUPPORTED_RESOLUTION]
    = "Video resolution is not supported: ";
TRACK_ERROR_TO_MESSAGE_MAP[JitsiTrackErrors.FIREFOX_EXTENSION_NEEDED]
    = "Firefox extension is not installed";
TRACK_ERROR_TO_MESSAGE_MAP[JitsiTrackErrors.CHROME_EXTENSION_INSTALLATION_ERROR]
    = "Failed to install Chrome extension";
TRACK_ERROR_TO_MESSAGE_MAP[JitsiTrackErrors.CHROME_EXTENSION_USER_CANCELED]
    = "User canceled Chrome's screen sharing prompt";
TRACK_ERROR_TO_MESSAGE_MAP[JitsiTrackErrors.CHROME_EXTENSION_GENERIC_ERROR]
    = "Unknown error from Chrome extension";
TRACK_ERROR_TO_MESSAGE_MAP[JitsiTrackErrors.GENERAL]
    = "Generic getUserMedia error";
TRACK_ERROR_TO_MESSAGE_MAP[JitsiTrackErrors.PERMISSION_DENIED]
    = "User denied permission to use device(s): ";
TRACK_ERROR_TO_MESSAGE_MAP[JitsiTrackErrors.NOT_FOUND]
    = "Requested device(s) was/were not found: ";
TRACK_ERROR_TO_MESSAGE_MAP[JitsiTrackErrors.CONSTRAINT_FAILED]
    = "Constraint could not be satisfied: ";
TRACK_ERROR_TO_MESSAGE_MAP[JitsiTrackErrors.TRACK_IS_DISPOSED]
    = "Track has been already disposed";
TRACK_ERROR_TO_MESSAGE_MAP[JitsiTrackErrors.TRACK_NO_STREAM_FOUND]
    = "Track does not have an associated Media Stream";
TRACK_ERROR_TO_MESSAGE_MAP[JitsiTrackErrors.TRACK_MUTE_UNMUTE_IN_PROGRESS]
    = "Track mute/unmute process is currently in progress";

/**
 * Represents an error that occurred to a JitsiTrack. Can represent various
 * types of errors. For error descriptions (@see JitsiTrackErrors).
 *
 * @extends Error
 */
export default class JitsiTrackError extends Error {
    /**
     * Initializes a new JitsiTrackError instance.
     *
     * @constructor
     * @param {Object|string} error - error object or error name
     * @param {Object|string} (options) - getUserMedia constraints object or
     * error message
     * @param {('audio'|'video'|'desktop'|'screen'|'audiooutput')[]} (devices) -
     * list of getUserMedia requested devices
     */
    constructor(error, options, devices) {
        super();

        if (typeof error === "object" && typeof error.name !== "undefined") {
            /**
             * Additional information about original getUserMedia error
             * and constraints.
             * @type {{
             *     error: Object,
             *     constraints: Object,
             *     devices: Array.<'audio'|'video'|'desktop'|'screen'>
             * }}
             */
            this.gum = {
                error,
                constraints: options,
                devices: devices && Array.isArray(devices)
                    ? devices.slice(0)
                    : undefined
            };

            switch (error.name) {
            case "PermissionDeniedError":
            case "SecurityError":
                this.name = JitsiTrackErrors.PERMISSION_DENIED;
                this.message
                    = TRACK_ERROR_TO_MESSAGE_MAP[this.name]
                        + (this.gum.devices || []).join(", ");
                break;
            case "DevicesNotFoundError":
            case "NotFoundError":
                this.name = JitsiTrackErrors.NOT_FOUND;
                this.message
                    = TRACK_ERROR_TO_MESSAGE_MAP[this.name]
                        + (this.gum.devices || []).join(", ");
                break;
            case "ConstraintNotSatisfiedError":
            case "OverconstrainedError":
                var constraintName = error.constraintName;

                if (options
                        && options.video
                        && (!devices || devices.indexOf('video') > -1)
                        && (constraintName === "minWidth"
                            || constraintName === "maxWidth"
                            || constraintName === "minHeight"
                            || constraintName === "maxHeight"
                            || constraintName === "width"
                            || constraintName === "height")) {
                    this.name = JitsiTrackErrors.UNSUPPORTED_RESOLUTION;
                    this.message
                        = TRACK_ERROR_TO_MESSAGE_MAP[this.name]
                            + getResolutionFromFailedConstraint(
                                    constraintName,
                                    options);
                } else {
                    this.name = JitsiTrackErrors.CONSTRAINT_FAILED;
                    this.message
                        = TRACK_ERROR_TO_MESSAGE_MAP[this.name]
                            + error.constraintName;
                }
                break;
            default:
                this.name = JitsiTrackErrors.GENERAL;
                this.message
                    = error.message || TRACK_ERROR_TO_MESSAGE_MAP[this.name];
                break;
            }
        } else if (typeof error === "string") {
            if (TRACK_ERROR_TO_MESSAGE_MAP[error]) {
                this.name = error;
                this.message = options || TRACK_ERROR_TO_MESSAGE_MAP[error];
            } else {
                // this is some generic error that do not fit any of our
                // pre-defined errors, so don't give it any specific name, just
                // store message
                this.message = error;
            }
        } else {
            throw new Error("Invalid arguments");
        }

        this.stack = error.stack || (new Error()).stack;
    }
}

/**
 * Gets failed resolution constraint from corresponding object.
 * @param {string} failedConstraintName
 * @param {Object} constraints
 * @returns {string|number}
 */
function getResolutionFromFailedConstraint(failedConstraintName, constraints) {
    if (constraints && constraints.video && constraints.video.mandatory) {
        switch (failedConstraintName) {
        case "width":
            return constraints.video.mandatory.minWidth;
        case "height":
            return constraints.video.mandatory.minHeight;
        default:
            return constraints.video.mandatory[failedConstraintName] || "";
        }
    }

    return "";
}