From b6f46e166da28e67adc0bf6f1e9a0a380434e7ce Mon Sep 17 00:00:00 2001
From: Omar Rizwan <omar.rizwan@gmail.com>
Date: Thu, 22 Nov 2018 02:52:54 -0800
Subject: Checkpoint. Just access JSON directly in FUSE handlers.

---
 extension/background.js | 86 ++++++++++++++++++++++++++++---------------------
 1 file changed, 50 insertions(+), 36 deletions(-)

(limited to 'extension')

diff --git a/extension/background.js b/extension/background.js
index b08311c..912075d 100644
--- a/extension/background.js
+++ b/extension/background.js
@@ -2,9 +2,13 @@ const ws = new WebSocket("ws://localhost:8888");
 
 const ops = {
   NONE: 0,
+
   GETATTR: 1,
-  READDIR: 2
+  OPEN: 2,
+  READDIR: 3,
+  READ: 4
 };
+
 const unix = {
   EPERM: 1,
   ENOENT: 2,
@@ -24,6 +28,12 @@ const unix = {
   S_IFSOCK: 0140000, // socket
 }
 
+function UnixError(error) {
+  this.name = "UnixError";
+  this.error = error;
+}
+UnixError.prototype = Error.prototype;
+
 function queryTabs() {
   return new Promise((resolve, reject) => chrome.tabs.query({}, resolve));
 }
@@ -54,22 +64,14 @@ function findRoute(path) {
   for (let segment of path.split("/")) {
     if (segment === "") continue;
     route = route[segment] || route["*"];
-  }
-  return route;
-}
 
-async function readdir(path) {
-  let route = findRoute(path);
-
-  if (route.readdir) {
-    return route.readdir();
+    if (!route) throw new UnixError(unix.ENOENT);
   }
-  return Object.keys(route);
+  return route;
 }
 
 async function getattr(path) {
   let route = findRoute(path);
-
   if (route.getattr) {
     return route.getattr();
   } else {
@@ -78,39 +80,51 @@ async function getattr(path) {
       st_nlink: 3
     };
   }
-  /* 
-   * const response = {};
-   * if (path === "/" || path === "/tabs" || path === "/tabs/by-title" || path === "/tabs/by-id") {
-   *   response.st_mode = unix.S_IFDIR | 0755;
-   *   response.st_nlink = 3;
-
-   * } else if (path === "/tabs/hello.txt") {
-   *  
-   * } else {
-   *   response.error = unix.ENOENT;
-   * }
-   * return response;*/
+}
+
+async function readdir(path) {
+  let route = findRoute(path);
+  if (route.readdir) {
+    return route.readdir();
+  }
+  return Object.keys(route);
 }
 
 ws.onmessage = async function(event) {
   const req = JSON.parse(event.data);
   console.log('req', Object.entries(ops).find(([op, opcode]) => opcode === req.op)[0], req);
 
-  let response;
-  if (req.op === ops.READDIR) {
-    response = {
-      op: ops.READDIR,
-      entries: [".", "..", ...(await readdir(req.path))]
-    };
+  let response = { op: req.op, error: unix.EIO };
+  try {
+    if (req.op === ops.GETATTR) {
+      response = {
+        op: ops.GETATTR,
+        st_mode: 0,
+        st_nlink: 0,
+        st_size: 0,
+        ...(await getattr(req.path))
+      };
+    } else if (req.op === ops.OPEN) {
+      throw new UnixError(unix.EIO);
 
-  } else if (req.op === ops.GETATTR) {
+    } else if (req.op === ops.READDIR) {
+      response = {
+        op: ops.READDIR,
+        entries: [".", "..", ...(await readdir(req.path))]
+      };
+
+    } else if (req.op === ops.READ) {
+      response = {
+        op: ops.READ,
+        buf: await read(req.path)
+      };
+    }
+
+  } catch (e) {
     response = {
-      op: ops.GETATTR,
-      st_mode: 0,
-      st_nlink: 0,
-      st_size: 0,
-      ...(await getattr(req.path))
-    };
+      op: req.op,
+      error: e instanceof UnixError ? e.error : unix.EIO
+    }
   }
 
   console.log('response', Object.entries(ops).find(([op, opcode]) => opcode === response.op)[0], response);
-- 
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