add db to doc function

package.json

@@ -21,6 +21,7 @@
     "bowser": "^1.8.1",
     "imports-loader": "^0.7.1",
     "memoizee": "^0.3.9",
+    "pouchdb": "^6.3.4",
     "proptypes": "^1.1.0",
     "raw-loader": "^0.5.1",
     "react": "^16.0.0",

src/shape/dbToDoc.js

@@ -0,0 +1,63 @@
+import { blobToJSON } from '../utils/binaryUtils.js';
+import JSONToSketchData from './JSONToSketchData.js';
+import semver from 'semver';
+
+export async function docToFile(db, doc, { image = false, sketch = false } = {}) {
+  // NOTE doc.appVersion can be used to check in which version of the app the file was saved in
+  const response = {
+    name: doc.name,
+    id: doc._id,
+    createdOn: doc.createdOn,
+    updatedOn: doc.updatedOn
+  };
+
+  const { appVersion } = doc;
+
+  const keys = [];
+  if (sketch && semver.gt(appVersion, '0.0.4')) keys.push('sketch');
+
+  if (keys.length > 0) await addAttachments(db, [doc], keys);
+
+  if (sketch) {
+    if (semver.gt(appVersion, '0.0.4')) {
+      if (!(doc._attachments && doc._attachments.sketch && doc._attachments.sketch.data)) {
+        throw new Error(`'${doc.name}' doesn't include sketch attachment`);
+      }
+      const data = await blobToJSON(doc._attachments.sketch.data);
+      response.data = await JSONToSketchData(data);
+    } else {
+      const data = { data: doc.data, appVersion };
+      response.data = await JSONToSketchData(data);
+    }
+  }
+  if (image) {
+    response.img = `${db.name}/${doc._id}/img`;
+  }
+
+  return response;
+}
+
+export async function addAttachments(db, docs, keys) {
+  if (keys) {
+    keys = keys.reduce((obj, value) => {
+      obj[value] = null;
+      return obj;
+    }, {});
+  }
+
+  const promises = [];
+
+  for (const { _attachments: attachments, _id: id } of docs) {
+    for (const attachmentId in keys || attachments) {
+      const attachment = attachments[attachmentId];
+
+      const promise = db.getAttachment(id, attachmentId).then(blob => {
+        attachment.data = blob;
+      });
+
+      promises.push(promise);
+    }
+  }
+
+  await Promise.all(promises);
+}

src/shape/index.js

@@ -1,5 +1,6 @@
+import dbToDoc from './dbToDoc.js';
 import shapeToPoints from './shapeToPoints.js';
 import JSONToSketchData from './JSONToSketchData.js';
 import ShapeDataUtils from './shapeDataUtils.js';
 
-export { shapeToPoints, JSONToSketchData, ShapeDataUtils };
+export { dbToDoc, shapeToPoints, JSONToSketchData, ShapeDataUtils };