Added scan API

Signed-off-by: James Ketrenos <james_git@ketrenos.com>

server/app.js

@@ -113,6 +113,7 @@ app.use(morgan("common"));
 app.use(basePath + "api/v1/photos", require("./routes/photos"));
 app.use(basePath + "api/v1/days", require("./routes/days"));
 app.use(basePath + "api/v1/albums", require("./routes/albums"));
+app.use(basePath + "api/v1/scan", require("./routes/scan")(scanner));
 
 /* Declare the "catch all" index route last; the final route is a 404 dynamic router */
 app.use(basePath + "/*", index);
@@ -130,7 +131,8 @@ require("./db/photos").then(function(photoDB) {
   return photoDB;
 }).then(function(photoDB) {
   console.log("Scanning.");
-  return scanner.scan(photoDB);
+  scanner.init(photoDB);
+  return scanner.scan();
 }).then(function() {
   console.log("Scanning completed.");
 }).catch(function(error) {

server/routes/scan.js

@@ -0,0 +1,49 @@
+"use strict";
+
+const express = require("express"),
+  fs = require("fs"),
+  url = require("url"),
+  config = require("config"),
+  moment = require("moment");
+
+let photoDB;
+
+require("../db/photos").then(function(db) {
+  photoDB = db;
+});
+
+const router = express.Router();
+let scanner = null;
+
+router.get("/", function(req, res/*, next*/) {
+  console.log("Scanning.");
+
+  let responded = false;
+
+  if (!scanner) {
+    return res.status(500).send("Not yet initialized.");
+  }
+
+  scanner.scan().then(function(results) {
+    if (responded) {
+      return;
+    }
+
+    responded = true;
+    return res.status(200).send(results);
+  });
+
+  setTimeout(function() {
+    if (responded) {
+      return;
+    }
+    responded = true;
+    return res.status(200).send("scan initiated");
+  }, 50);
+});
+
+module.exports = function(_scanner) {
+  scanner = _scanner;
+  return router;
+};
+  

server/scanner.js

@@ -626,6 +626,7 @@ function computeHash(filepath) {
   });
 }
 
+let scanning = false;
 function doScan() {
   /* 1. Scan for all assets which will be managed by the system. readdir
     * 2. Check if entry in DB. Check mod-time in DB vs. stats from #1
@@ -646,6 +647,10 @@ function doScan() {
   let now = Date.now();
   let needsProcessing = [];
 
+  if (scanning) {
+    return Promise.resolve("scanning");
+  }
+
   return photoDB.sequelize.query("SELECT max(scanned) AS scanned FROM photos", {
     type: photoDB.sequelize.QueryTypes.SELECT
   }).then(function(results) {
@@ -752,12 +757,17 @@ function doScan() {
     }).then(function() {
       console.log("Total time to initialize DB and all scans: " + ((Date.now() - initialized) / 1000) + "s");
     });
+  }).then(function() {
+    scanning = false;
+    return "scan complete";
   });
 }
 
 module.exports = {
-  scan: function (db) {
+  init: function(db) {
     photoDB = db;
+  },
+  scan: function () {
     return doScan();
   }
 };