Add several local mode enabling endpoints

Change-type: minor
Signed-off-by: Cameron Diver <cameron@resin.io>

src/device-api/v2.ts

@@ -1,6 +1,7 @@
 import * as Bluebird from 'bluebird';
 import { Request, Response, Router } from 'express';
 import * as _ from 'lodash';
+import { fs } from 'mz';
 
 import { ApplicationManager } from '../application-manager';
 import { Service } from '../compose/service';
@@ -199,4 +200,95 @@ export function createV2Api(router: Router, applications: ApplicationManager) {
 				res.status(200).json(apps);
 			});
 	});
+
+	router.get('/v2/local/target-state', async (_req, res) => {
+		try {
+			const localMode = checkTruthy(await deviceState.config.get('localMode'));
+			if (!localMode) {
+				return res.status(400).json({
+					status: 'failed',
+					message: 'Target state can only be retrieved when in local mode',
+				});
+			}
+
+			res.status(200).json({
+				status: 'success',
+				state: await deviceState.getTarget(),
+			});
+		} catch (err) {
+			res.status(503).send({
+				status: 'failed',
+				message: messageFromError(err),
+			});
+		}
+	});
+
+	router.post('/v2/local/target-state', async (req, res) => {
+		// let's first ensure that we're in local mode, otherwise
+		// this function should not do anything
+		// TODO: We really should refactor the config module to provide bools
+		// as bools etc
+		try {
+			const localMode = checkTruthy(await deviceState.config.get('localMode'));
+			if (!localMode) {
+				return res.status(400).json({
+					status: 'failed',
+					message: 'Target state can only set when device is in local mode',
+				});
+			}
+
+			// Now attempt to set the state
+			const force = req.body.force;
+			const targetState = req.body;
+			try {
+				await deviceState.setTarget(targetState);
+				await deviceState.config.set({ localModeTargetSet: true });
+				await deviceState.triggerApplyTarget({ force });
+				res.status(200).json({
+					status: 'success',
+					message: 'OK',
+				});
+			} catch (e) {
+				res.status(400).json({
+					status: 'failed',
+					message: e.message,
+				});
+			}
+
+		} catch (e) {
+			const message = 'Could not apply target state: ';
+			res.status(503).json({
+				status: 'failed',
+				message: message + messageFromError(e),
+			});
+		}
+	});
+
+	router.get('/v2/local/device-info', async (_req, res) => {
+		// Return the device type and slug so that local mode builds can use this to
+		// resolve builds
+		try {
+
+			// FIXME: We should be mounting the following file into the supervisor from the
+			// start-resin-supervisor script, changed in meta-resin - but until then, hardcode it
+			const data = await fs.readFile('/mnt/root/resin-boot/device-type.json', 'utf8');
+			const deviceInfo = JSON.parse(data);
+
+
+			return res.status(200).json({
+				status: 'sucess',
+				info: {
+					arch: deviceInfo.arch,
+					deviceType: deviceInfo.slug,
+				},
+			});
+
+		} catch (e) {
+			const message = 'Could not fetch device information: ';
+			res.status(503).json({
+				status: 'failed',
+				message: message + messageFromError(e),
+			});
+		}
+	});
 }