Export and import attachents as base64 encoded files

models/export.js

@@ -55,12 +55,32 @@ class Exporter {
     result.cards = Cards.find(byBoard, noBoardId).fetch();
     result.comments = CardComments.find(byBoard, noBoardId).fetch();
     result.activities = Activities.find(byBoard, noBoardId).fetch();
-    // for attachments we only export IDs and absolute url to original doc
+    // [Old] for attachments we only export IDs and absolute url to original doc
+    // [New] Encode attachment to base64
+    const getBase64Data = function(doc, callback) {
+      let buffer = new Buffer(0);
+      // callback has the form function (err, res) {}
+      const readStream = doc.createReadStream();
+      readStream.on('data', function(chunk) {
+        buffer = Buffer.concat([buffer, chunk]);
+      });
+      readStream.on('error', function(err) {
+        callback(err, null);
+      });
+      readStream.on('end', function() {
+        // done
+        callback(null, buffer.toString('base64'));
+      });
+    };
+    const getBase64DataSync = Meteor.wrapAsync(getBase64Data);
     result.attachments = Attachments.find(byBoard).fetch().map((attachment) => {
       return {
         _id: attachment._id,
         cardId: attachment.cardId,
-        url: FlowRouter.url(attachment.url()),
+        // url: FlowRouter.url(attachment.url()),
+        file: getBase64DataSync(attachment),
+        name: attachment.original.name,
+        type: attachment.original.type,
       };
     });
 

models/wekanCreator.js

@@ -303,21 +303,40 @@ export class WekanCreator {
           // - the template then tries to display the url to the attachment which causes other errors
           // so we make it server only, and let UI catch up once it is done, forget about latency comp.
           if(Meteor.isServer) {
-            file.attachData(att.url, function (error) {
-              file.boardId = boardId;
-              file.cardId = cardId;
-              if (error) {
-                throw(error);
-              } else {
-                const wekanAtt = Attachments.insert(file, () => {
-                  // we do nothing
-                });
-                //
-                if(wekanCoverId === att._id) {
-                  Cards.direct.update(cardId, { $set: {coverId: wekanAtt._id}});
+            if (att.url) {
+              file.attachData(att.url, function (error) {
+                file.boardId = boardId;
+                file.cardId = cardId;
+                if (error) {
+                  throw(error);
+                } else {
+                  const wekanAtt = Attachments.insert(file, () => {
+                    // we do nothing
+                  });
+                  //
+                  if(wekanCoverId === att._id) {
+                    Cards.direct.update(cardId, { $set: {coverId: wekanAtt._id}});
+                  }
                 }
-              }
-            });
+              });
+            } else if (att.file) {
+              file.attachData(new Buffer(att.file, 'base64'), {type: att.type}, (error) => {
+                file.name(att.name);
+                file.boardId = boardId;
+                file.cardId = cardId;
+                if (error) {
+                  throw(error);
+                } else {
+                  const wekanAtt = Attachments.insert(file, () => {
+                    // we do nothing
+                  });
+                  //
+                  if(wekanCoverId === att._id) {
+                    Cards.direct.update(cardId, { $set: {coverId: wekanAtt._id}});
+                  }
+                }
+              });
+            }
           }
           // todo XXX set cover - if need be
         });
@@ -406,7 +425,7 @@ export class WekanCreator {
         const wekanAttachment = wekanBoard.attachments.filter((attachment) => {
           return attachment._id === activity.attachmentId;
         })[0];
-        if(wekanAttachment.url) {
+        if(wekanAttachment.url || wekanAttachment.file) {
           // we cannot actually create the Wekan attachment, because we don't yet
           // have the cards to attach it to, so we store it in the instance variable.
           const wekanCardId = activity.cardId;