public launchServer()

in src/extension/simulate.ts [65:119]
47 lines of code
12 McCabe index (conditional complexity)

    public launchServer(fsPath: string, simulateOptions: CordovaSimulate.SimulateOptions, projectType: ProjectType): Promise<SimulationInfo> {
        const uri = vscode.Uri.file(fsPath);
        const workspaceFolder = <vscode.WorkspaceFolder>vscode.workspace.getWorkspaceFolder(uri);
        simulateOptions.dir = workspaceFolder.uri.fsPath;
        if (!simulateOptions.simulationpath) {
            simulateOptions.simulationpath = path.join(workspaceFolder.uri.fsPath, ".vscode", "simulate");
        }

        return this.getPackage()
            .then(() => {
                if (this.isServerRunning()) {
                    /* close the server old instance */
                    return this.simulator.stopSimulation();
                }
            })
            .then(() => {
                let simulateTelemetryWrapper = new CordovaSimulateTelemetry();
                simulateOptions.telemetry = simulateTelemetryWrapper;

                this.simulator = new this.simulatePackage.Simulator(simulateOptions);
                let platforms = CordovaProjectHelper.getInstalledPlatforms(workspaceFolder.uri.fsPath);

                let platform = simulateOptions.platform;
                let isPlatformMissing = platform && platforms.indexOf(platform) < 0;

                if (isPlatformMissing) {
                    let command = "cordova";
                    if (projectType.isIonic) {
                        const isIonicCliVersionGte3 = CordovaProjectHelper.isIonicCliVersionGte3(workspaceFolder.uri.fsPath);
                        command = "ionic" + (isIonicCliVersionGte3 ? " cordova" : "");
                    }

                    throw new Error(localize("CouldntFindPlatformInProject", "Couldn't find platform {0} in project, please install it using '{1} platform add {2}'", platform, command, platform));
                }

                return this.simulator.startSimulation()
                    .then(() => {
                        if (!this.simulator.isRunning()) {
                            throw new Error(localize("ErrorStartingTheSimulation", "Error starting the simulation"));
                        }

                        this.simulationInfo = {
                            appHostUrl: this.simulator.appUrl(),
                            simHostUrl: this.simulator.simHostUrl(),
                            urlRoot: this.simulator.urlRoot(),
                        };
                        if ((projectType.ionicMajorVersion === 2 || projectType.ionicMajorVersion === 3)
                            && platform && platform !== PlatformType.Browser
                        ) {
                            this.simulationInfo.appHostUrl = `${this.simulationInfo.appHostUrl}?ionicplatform=${simulateOptions.platform}`;
                        }
                        return this.simulationInfo;
                    });
            });
    }