Patch ionic angular to fix swipe back issue

patch-ionic-angular.js

/* tslint:disable */
var fs = require('fs');

let filePath = './node_modules/@ionic/angular/dist/fesm5.js';
let monkeyPatch = `// Start monkey patching
StackController.prototype.startBackTransition = function () {
    return __awaiter(this, void 0, void 0, function () {
        var leavingView, views, enteringView_1;
        var _this = this;
        return __generator(this, function (_a) {
            switch (_a.label) {
                case 0:
                    leavingView = this.activeView;
                    if (!leavingView) return [3 /*break*/, 2];
                    views = this.getStack(leavingView.stackId);
                    enteringView_1 = views[views.length - 2];
                    enteringView_1.ref.changeDetectorRef.reattach();
                    return [4 /*yield*/, this.wait((/**
                     * @return {?}
                     */
                    function () {
                        return _this.transition(enteringView_1, // entering view
                            leavingView, // leaving view
                            'back', true, false);
                    }))];
                case 1:
                    _a.sent();
                    _a.label = 2;
                case 2: return [2 /*return*/];
            }
        });
    });
};

StackController.prototype.endBackTransition = function (shouldComplete) {
    shouldComplete = true;
    if (shouldComplete) {
        this.skipTransition = true;
        this.pop(1);
    }
};
// End monkey patching`;


if(fs.existsSync(filePath)) {
	console.log('Found File to patch');
	let lines = fs.readFileSync(filePath, {encoding: 'UTF-8'}).split('\n');
	let monkeyPatchLines = monkeyPatch.split('\n');
	if(!lines[lines.length - 2].startsWith('export')) {
		throw new Error('Something is odd, bailing');
	}
	if(lines[lines.length - 3] === monkeyPatchLines[monkeyPatchLines.length-1]) {
		console.log('Already patched!');
	} else {
		console.log('Patching...');
		lines.splice(lines.length - 3, 1, monkeyPatch);
		fs.writeFileSync(filePath, lines.join('\n'));
		console.log('Patched!');
	}
}