Updated idb mutable file wrapper to fix bugs

Author: RangerMauve

index.js

@@ -21,7 +21,7 @@ if (requestFileSystem) {
 } else if (mutableFile) {
   storage = (options = {}) => {
     if (typeof options === 'string') options = { name: options }
-    return mutableStorage(options)
+    return require('./mutable-file-wrapper.js')(options)
   }
 } else if (idb) {
   storage = (options = {}) => {
@@ -32,77 +32,3 @@ if (requestFileSystem) {
 }
 
 module.exports = storage
-
-function mutableStorage (options) {
-  const randomAccess = require('random-access-storage')
-  const mutableAccess = require('random-access-idb-mutable-file')
-
-  let mounted = null
-  let loading = null
-
-  function doMount () {
-    return mutableAccess.mount(options).then((requestFile) => {
-      mounted = requestFile
-      loading = null
-    })
-  }
-
-  return (name) => {
-    let file = null
-
-    return randomAccess({
-      open: function (req) {
-        if (!mounted) {
-          loading = doMount()
-        }
-        if (loading) {
-          loading.then(() => {
-            this._open(req)
-          }, (err) => {
-            req.callback(err)
-          })
-          return
-        }
-
-        file = mounted(name)
-
-        file._open(req)
-      },
-      openReadonly: function (req) {
-        if (!mounted) {
-          loading = doMount()
-        }
-        if (loading) {
-          loading.then(() => {
-            this._openReadonly(req)
-          }, (err) => {
-            req.callback(err)
-          })
-          return
-        }
-
-        file = mounted(name)
-
-        file._openReadonly(req)
-      },
-      write: function (req) {
-        file._write(req)
-      },
-      read: function (req) {
-        file._read(req)
-      },
-      del: function (req) {
-        file._del(req)
-      },
-      stat: function (req) {
-        file._stat(req)
-      },
-      close: function (req) {
-        file._close(req)
-      },
-      destroy: function (req) {
-        file._destroy(req)
-      }
-    })
-  }
-}

mutable-file-wrapper.js

@@ -0,0 +1,69 @@
+
+module.exports = function mutableStorage (options) {
+  const randomAccess = require('random-access-storage')
+  const mutableAccess = require('random-access-idb-mutable-file')
+
+  let mounted = null
+  let loading = null
+
+  function doMount () {
+    return mutableAccess.mount(options).then((requestFile) => {
+      mounted = requestFile
+      loading = null
+    })
+  }
+
+  return (name) => {
+    let file = null
+
+    return randomAccess({
+      open: function (req) {
+        if (!mounted && !loading) {
+          loading = doMount()
+        }
+        if(loading) {
+          loading.then(() => {
+            this._open(req)
+          }, (err) => {
+            req.callback(err)
+          })
+          return
+        }
+
+        file = mounted(name)
+
+        req.callback()
+      },
+      write: function (req) {
+        file.write(req.offset, req.data, function(err, data) {
+          req.callback(err, data)
+        })
+      },
+      read: function (req) {
+        file.read(req.offset, req.size,  function(err, data) {
+          req.callback(err, data)
+        })
+      },
+      del: function (req) {
+        file.del(req.offset, req.size,  function(err, data) {
+          req.callback(err, data)
+        })
+      },
+      stat: function (req) {
+        file.stat( function(err, data) {
+          req.callback(err, data)
+        })
+      },
+      close: function (req) {
+        file.close( function(err, data) {
+          req.callback(err, data)
+        })
+      },
+      destroy: function (req) {
+        file.destroy( function(err, data) {
+          req.callback(err, data)
+        })
+      }
+    })
+  }
+}