feat(falcor): add create a new book in a world

Closes #10

Author: itsjgf

src/falcor/transforms/books.js

@@ -55,10 +55,10 @@ export function getBooksLength(worldID) {
 export function getWorldByBook(bookId) {
   const query = `
     match (b:Book)-[rel:IN]->(w:World)
-    WHERE rel.archived = false and b._id = "${bookId}"
+    WHERE rel.archived = false and b._id = {bookId}
     return w._id as id
   `;
-  return this.flatMap(db => db.neo.run(query))
+  return this.flatMap(db => db.neo.run(query,{bookId}))
     .map(record =>
       record.get('id')
     )

src/falcor/transforms/worlds.js

@@ -127,7 +127,7 @@ function createRelationFromBookToWorld(bookId, worldId, creator){
   const query = `
    MERGE (w:World {_id: {worldId} })
    MERGE (b:Book {_id: {bookId} })
-   MERGE (b)-[rel:IN]-(w)
+   MERGE (b)-[rel:IN]->(w)
    SET rel.archived = false, b.archived = false,
    rel.created_at = timestamp(), rel.creator = {creator}
    return rel as rel`;

src/falcor/worlds/index.js

@@ -203,7 +203,6 @@ export default ( db, req, res ) => {
           )
         )
     },
-
     {
       route: 'worldsById[{keys:ids}].books.length',
       get: ({ids}) => {
@@ -219,6 +218,28 @@ export default ( db, req, res ) => {
           })
       }
     },
+    {
+      route: 'worldsById[{keys:ids}].books.push',
+      call: ( { ids: [ id ] }, [ {title} ] ) => {
+        return db
+          ::getWorldsNext([id], user._id)
+          .flatMap(world => db
+            ::createBook(world._id, title, user._id)
+            .flatMap(book => db
+              ::getBooksFromWorld(world._id, user._id).count()
+              .flatMap(count => {
+                return [
+                  {path: ["booksById", book._id, "_id"], value: book._id},
+                  {path: ["booksById", book._id, "title"], value: book.title},
+                  {path: ["worldsById", world._id, "books", count - 1], value: $ref(['booksById', book._id])},
+                  {path: ["worldsById", world._id, "books", "length"], value: count},
+                ]
+              })
+            )
+          )
+      }
+      ,
+    },
 
     /**
      * Outlines