nativescript-vue-router-extended/router-guard-service.js

NativeScript Vue Router Extended for NativeScript Vue hybrid Apps.

export class RouterGuardService {
    constructor(to, from, isHook = false) {
        this.guardCallbacks = [];
        this.isCancelled = false;
        this.lastContext = null;
        this.isHook = false;
        this.setRoutes(to, from);
        this.isHook = isHook;
    }
    add(callback) {
        this.guardCallbacks.push(callback);
    }
    async executeCallbacks(arr, predicate) {
        for (const e of arr) {
            if (await predicate(e)) {
                return true;
            }
        }
        return false;
    }
    run() {
        this.lastContext = true;
        const next = (vmContext) => {
            if (typeof vmContext === "undefined") {
                return;
            }
            this.lastContext = vmContext;
            if (vmContext === false) {
                this.isCancelled = true;
            }
        };
        this.executeCallbacks(this.guardCallbacks.filter((callback) => typeof callback === "function"), async (callback) => {
            if (this.isCancelled) {
                return true;
            }
            let result = null;
            if (this.isHook) {
                const hookCallback = callback;
                await hookCallback(this.routeTo, this.routeFrom);
            }
            else if (callback &&
                typeof callback.then === "function") {
                result = await callback(this.routeTo, this.routeFrom, next);
            }
            else {
                result = callback(this.routeTo, this.routeFrom, next);
            }
            if (result === false) {
                this.isCancelled = true;
                this.lastContext = false;
                return true;
            }
            if (result && result !== true) {
                this.isCancelled = true;
                this.lastContext = result;
                return true;
            }
            return false;
        });
        return this.lastContext;
    }
    setRoutes(to, from) {
        this.routeTo = to;
        this.routeFrom = from;
        this.isCancelled = false;
    }
}
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