Refactor MÁV extractor to also work on just barcodes

We don't get proper location names in that case, but it's fully functional
on its own nevertheless. This enables import via a scanned barcode.

src/lib/scripts/mav.js

@@ -3,6 +3,41 @@
    SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
+function parseDateTime(value)
+{
+    const base = new Date(2017, 0, 1);
+    return new Date(value * 1000 + base.getTime());
+}
+
+function parseBarcode(data) {
+    var res = JsonLd.newTrainReservation();
+    // see https://community.kde.org/KDE_PIM/KItinerary/MAV_Barcode
+    const inner = ByteArray.inflate(data.slice(2));
+    const view = new DataView(inner);
+    if (view.getUInt8(28) == 0x81) {
+        res.reservationFor.departureStation.identifier = "uic:" + (view.getUint32(106, false) & 0xffffff);
+        res.reservationFor.departureStation.name = "" + (view.getUint32(106, false) & 0xffffff);
+        res.reservationFor.arrivalStation.identifier = "uic:" + (view.getUint32(109, false) & 0xffffff);
+        res.reservationFor.arrivalStation.name = "" + (view.getUint32(109, false) & 0xffffff);
+        res.reservationFor.provider.identifier = "uic:" + view.getUint16(18, false);
+        res.reservationFor.departureDay = parseDateTime(view.getUint32(205, false));
+        res.reservationNumber = ByteArray.decodeUtf8(inner.slice(0, 17));
+        res.underName.name = ByteArray.decodeUtf8(inner.slice(39, 39 + 45));
+        res.reservedTicket.ticketedSeat.seatingType = ByteArray.decodeUtf8(inner.slice(203, 204));
+    }
+    for (var i = 0; i < view.getUInt8(30); ++i) {
+        const seatBlock = inner.slice(inner.byteLength - ((i+1) *57));
+        const seatView = new DataView(seatBlock);
+        if (seatView.getUInt8(22) == 0) { // surcharge block
+            continue;
+        }
+        res.reservedTicket.ticketedSeat.seatSection = ByteArray.decodeUtf8(seatBlock.slice(22, 25));
+        res.reservedTicket.ticketedSeat.seatNumber = seatView.getUInt16(25, false);
+    }
+    res.reservedTicket.ticketToken = "pdf417bin:" + ByteArray.toBase64(data);
+    return res;
+}
+
 function parseTicket(pdf, node, triggerNode) {
     var reservations = new Array();
     const text = pdf.pages[triggerNode.location].text;
@@ -13,35 +48,13 @@ function parseTicket(pdf, node, triggerNode) {
             break;
         }
         idx += trip.index + trip[0].length
-        var res = JsonLd.newTrainReservation();
+        var res = JsonLd.clone(triggerNode.result[0]);
         res.reservationFor.departureStation.name = trip[3];
         res.reservationFor.arrivalStation.name = trip[4];
         res.reservationFor.departureTime = JsonLd.toDateTime(trip[1] + trip[2], "yyyy.MM.ddhh:mm", "hu");
         res.reservationFor.arrivalTime = JsonLd.toDateTime(trip[1] + trip[5], "yyyy.MM.ddhh:mm", "hu");
         res.reservationFor.trainNumber = trip[6];
         res.reservedTicket.ticketedSeat.seatingType = trip[7];
-        res.reservedTicket.ticketToken = "pdf417bin:" + ByteArray.toBase64(triggerNode.content);
-
-        // see https://community.kde.org/KDE_PIM/KItinerary/MAV_Barcode
-        const inner = ByteArray.inflate(triggerNode.content.slice(2));
-        const view = new DataView(inner);
-        if (view.getUInt8(28) == 0x81) {
-            res.reservationFor.departureStation.identifier = "uic:" + (view.getUint32(106, false) & 0xffffff);
-            res.reservationFor.arrivalStation.identifier = "uic:" + (view.getUint32(109, false) & 0xffffff);
-            res.reservationFor.provider.identifier = "uic:" + view.getUint16(18, false);
-            res.reservationNumber = ByteArray.decodeUtf8(inner.slice(0, 17));
-            res.underName.name = ByteArray.decodeUtf8(inner.slice(39, 39 + 45));
-        }
-        for (var i = 0; i < view.getUInt8(30); ++i) {
-            const seatBlock = inner.slice(inner.byteLength - ((i+1) *57));
-            const seatView = new DataView(seatBlock);
-            if (seatView.getUInt8(22) == 0) { // surcharge block
-                continue;
-            }
-            res.reservedTicket.ticketedSeat.seatSection = ByteArray.decodeUtf8(seatBlock.slice(22, 25));
-            res.reservedTicket.ticketedSeat.seatNumber = seatView.getUInt16(25, false);
-        }
-
         reservations.push(res);
     }
     return reservations;

src/lib/scripts/mav.json

-{
-    "filter": [
-        {
-            "match": "^\\x04\\x03\\x1f\\x8b",
-            "mimeType": "application/octet-stream",
-            "scope": "Descendants"
-        }
-    ],
-    "function": "parseTicket",
-    "mimeType": "application/pdf",
-    "script": "mav.js"
-}
+[
+    {
+        "filter": [
+            {
+                "match": "^\\x04\\x03\\x1f\\x8b",
+                "mimeType": "application/octet-stream",
+                "scope": "Current"
+            }
+        ],
+        "function": "parseBarcode",
+        "mimeType": "application/octet-stream",
+        "script": "mav.js"
+    },
+    {
+        "filter": [
+            {
+                "match": "^\\x04\\x03\\x1f\\x8b",
+                "mimeType": "application/octet-stream",
+                "scope": "Descendants"
+            }
+        ],
+        "function": "parseTicket",
+        "mimeType": "application/pdf",
+        "script": "mav.js"
+    }
+]