Filter visible boards by user projects

client/src/store/selectors/boards.js

@@ -0,0 +1,11 @@
+export function selectBoardByUserProjects(boardsByID, projectsByName) {
+  const userProjects = Object.keys(projectsByName);
+  return Object.keys(boardsByID).reduce((filteredBoardsByID, boardID) => {
+    const board = boardsByID[boardID];
+    const hasProject = board.projects.some(p => userProjects.indexOf(p) !== -1);
+    if (hasProject) {
+      filteredBoardsByID[boardID] = board;
+    }
+    return filteredBoardsByID;
+  }, {});
+}