Add stations cloud functions and tests

functions/index.js

@@ -18,7 +18,7 @@ exports.getLiveTrainData = functions.https.onRequest((request, response) => {
     // fetch the "liveTrainData" collection
     admin.firestore().collection('liveTrainData').get().then((snapshot) => {
       if (snapshot.empty) {
-        response.send({data: "Error fetching data from the database"});
+        response.send({data: "Error fetching live train data from the database"});
         return;
       }
       // iterate through each of the collection's documents
@@ -30,6 +30,70 @@ exports.getLiveTrainData = functions.https.onRequest((request, response) => {
   });
 })
 
+// function to fetch station data from the Firestore database
+exports.getStationData = functions.https.onRequest((request, response) => {
+  response.set('Access-Control-Allow-Origin', '*');
+  response.set('Access-Control-Allow-Credentials', 'true');
+  let jsonData = [];
+
+  cors(request, response, () => {
+    // fetch the "stations" collection
+    admin.firestore().collection('stations').get().then((snapshot) => {
+      if (snapshot.empty) {
+        response.send({data: "Error fetching station data from the database"})
+        return;
+      }
+      // iterate through each of the collection's documents
+      snapshot.forEach(doc => {
+        jsonData.push(doc.data());
+      });
+      response.json({data: jsonData});
+    })
+  });
+})
+
+// function to populate the Firestore database with station data from Irish Rail
+exports.postStationData = functions.https.onRequest((request, response) => {
+  response.set('Access-Control-Allow-Origin', '*');
+  response.set('Access-Control-Allow-Credentials', 'true');
+
+  cors(request, response, () => {
+    axios.get('http://api.irishrail.ie/realtime/realtime.asmx/getAllStationsXML')
+    .then((res) => {
+      // XML to JSON
+      parseString(res.data, function(err, result) {
+        let jsonStr = JSON.stringify(result);
+        let jsonObj = JSON.parse(jsonStr);
+        let jsonData = jsonObj.ArrayOfObjStation.objStation;
+
+        // batch delete all of the "stations" collection's documents
+        var db = admin.firestore();
+        admin.firestore().collection('stations').get().then((snapshot) => {
+          var batchDelete = db.batch();
+          snapshot.forEach(doc => {
+            batchDelete.delete(doc.ref);
+          });
+
+          batchDelete.commit().then(function() {
+            // batch write all station JSON objects to the "stations" collection
+            var batchWrite = db.batch();
+
+            jsonData.forEach((doc) => {
+              // set the station's ID as the document ID
+              var docID = db.collection('stations').doc(doc["StationCode"][0]);
+              batchWrite.set(docID, doc);
+            });
+
+            batchWrite.commit().then(function () {
+              response.send({data: "Successfully fetched and uploaded station data from Irish Rail"});
+            });
+          })
+        })
+      })
+    })
+  })
+})
+
 // function to populate the Firestore database with live train data from Irish Rail
 exports.postLiveTrainData = functions.https.onRequest((request, response) => {
   response.set('Access-Control-Allow-Origin', '*');
@@ -66,7 +130,7 @@ exports.postLiveTrainData = functions.https.onRequest((request, response) => {
                     });
 
                     batchWrite.commit().then(function () {
-                      response.send({data: "Successfully fetched and uploaded data from Irish Rail"});
+                      response.send({data: "Successfully fetched and uploaded live train data from Irish Rail"});
                     });
                   })
               })