feat(server): implemented getChartTracks api; feat(server): added some error helpers

server/src/helpers/errors.ts

@@ -0,0 +1,11 @@
+export const logError = (console: any) => (errorText: string) => console.error(`[deemix-server]: ${errorText}`)
+export const consoleError = logError(console)
+
+export class BadRequestError extends Error {
+	constructor() {
+		super()
+		this.message = 'Bad request!'
+	}
+}
+
+export const isBadRequestError = (error: any) => error instanceof BadRequestError

server/src/helpers/primitive-checks.ts

@@ -0,0 +1 @@
+export const isObjectEmpy = (obj: any) => Object.keys(obj).length === 0