From a70f52f965b91e20deae4fdda6c3fe434f8da329 Mon Sep 17 00:00:00 2001
From: Xuan Sang LE <xsang.le@gmail.com>
Date: Tue, 23 Jan 2018 18:16:41 +0100
Subject: [PATCH] VFS

---
 Makefile                               |   3 +-
 src/core/BaseApplication.coffee        |   1 -
 src/core/api.coffee                    |   2 +-
 src/core/gui.coffee                    |   5 --
 src/core/handlers/RemoteHandler.coffee |   6 ++
 src/core/vfs.coffee                    | 115 ++++++++++++++++++++++---
 6 files changed, 111 insertions(+), 21 deletions(-)

diff --git a/Makefile b/Makefile
index ae7cc75..77863ed 100644
--- a/Makefile
+++ b/Makefile
@@ -7,7 +7,8 @@ NC=\033[0m
 coffees= 	src/core/core.coffee\
         	src/core/api.coffee\
         	src/core/handlers/RemoteHandler.coffee\
-        	src/core/gui.coffee\
+        	src/core/vfs.coffee\
+			src/core/gui.coffee\
 			src/core/BaseModel.coffee\
 			src/core/BaseApplication.coffee\
 			src/core/BaseService.coffee\
diff --git a/src/core/BaseApplication.coffee b/src/core/BaseApplication.coffee
index ff54a23..d4ba971 100644
--- a/src/core/BaseApplication.coffee
+++ b/src/core/BaseApplication.coffee
@@ -1,4 +1,3 @@
-self = this
 class BaseApplication extends this.OS.GUI.BaseModel
     constructor: (name, args) ->
         super name, args
diff --git a/src/core/api.coffee b/src/core/api.coffee
index 9b5f6a2..c6df68a 100644
--- a/src/core/api.coffee
+++ b/src/core/api.coffee
@@ -2,7 +2,7 @@ self.OS.API =
     # the handler object could be a any remote or local handle to
     # fetch user data, used by the API to make requests
     # handlers are defined in /src/handlers
-    handler: {}
+    handler: { }
     #request a user data
     post: (p, d, c, f) ->
         q = _courrier.getMID()
diff --git a/src/core/gui.coffee b/src/core/gui.coffee
index a624c9e..333996d 100644
--- a/src/core/gui.coffee
+++ b/src/core/gui.coffee
@@ -1,10 +1,5 @@
 self.OS.GUI =
     dialog: new Object()
-    init: () ->
-        query =
-            path: 'VFS/get'
-            data: "#{_GUI.tagPath}/tags.json"
-        self.OS.API.request query, ()->
     htmlToScheme: (html, app, parent) ->
         scheme =  $.parseHTML html
         ($ parent).append scheme
diff --git a/src/core/handlers/RemoteHandler.coffee b/src/core/handlers/RemoteHandler.coffee
index 635dc3a..b70613c 100644
--- a/src/core/handlers/RemoteHandler.coffee
+++ b/src/core/handlers/RemoteHandler.coffee
@@ -3,6 +3,12 @@ self.OS.API.handler =
         path = "lua-api/fs/scandir"
         _API.post path, { path: p }, c, (e, s) ->
             _courrier.osfail "Fail to scan directory: #{path}", e, s
+
+    fileinfo: (p, c) ->
+        path = "lua-api/fs/fileinfo"
+        _API.post path, { path: p }, c, (e, s) ->
+            _courrier.osfail "Fail to get file metadata: #{path}", e, s
+            
     scanapp: (p, c ) ->
         path = "lua-api/system/application"
     auth: (c) ->
diff --git a/src/core/vfs.coffee b/src/core/vfs.coffee
index 7d66333..bc12973 100644
--- a/src/core/vfs.coffee
+++ b/src/core/vfs.coffee
@@ -1,15 +1,104 @@
-self.OS.API.VFS =
-    readdir: (p, c, er) ->
-        h = _API.VFS.pathHandler p
-        h p,
-            (d ) -> c d
-            , (e, s) -> er e, s
+String.prototype.hash = () ->
+    hash = 5381
+    i = this.length
+    hash = (hash * 33) ^ this.charCodeAt(--i) while i
+    hash >>> 0
 
-    pathHandler: (p) ->
-        list = p.split "///"
-        switch list[0]
-            when "app:"
-                return _API.handler.scanapp
-            else
-                return _API.handler.scandir
+String.prototype.asFileHandler = () ->
+    list = this.split ":///"
+    switch list[0]
+        when "app"
+            return new ApplicationHandler(this)
+        else
+            return new RemoteFileHandler(this)
+
+this.OS.API.VFS = {}
+
+class BasicFileHandler
+    constructor: (@path) ->
+        list = @path.split ":///"
+        @protocol = list[0]
+        return unless list.length > 1
+        re = list[1].replace(/^\/+|\/+$/g, '')
+        return if re is ""
+        @genealogy = re.split("/")
+        @basename = @genealogy[@genealogy.length - 1] unless @isRoot()
+        @ext = @basename.split( "." ).pop() unless @basename.lastIndexOf(".") is 0 or @basename.indexOf( "." ) is -1
+        @ready = false
+
+
+    isRoot: () -> (not @genealogy) or (@genealogy.size is 0)
     
+    isHidden: () ->
+        return false if not @basename
+        @basename[0] is "."
+
+    hash: () -> @path.hash()
+
+    parent: () ->
+        return @ if @isRoot()
+        (@protocol + ":///" + (@genealogy.slice 0 , @genealogy.length - 1).join "/").asFileHandler()
+
+    onready: (f, e) ->
+        # read meta data
+        return f() if @ready
+        me = @
+        me.meta (d) ->
+            return e d.error if d.error
+            me.meta = d.result
+            me.ready = true
+            f()
+
+    #public interface for all action on file
+    do: (a, f, e) ->
+        return e "Action #{a} not found" if not @[a]
+        me = @
+        @onready (() -> me[a] f), e
+
+    
+    # methods implemented by subclasses used as private methods
+    meta: (f) ->
+
+    read: (f) ->
+
+    write: (f) ->
+
+    remove: (f) ->
+
+    execute: (f) ->
+
+    ls: (f) ->
+    
+    mk: (f) ->
+
+# now export the class
+self.OS.API.VFS.BasicFileHandler = BasicFileHandler
+
+# Remote file handle
+class RemoteFileHandler extends self.OS.API.VFS.BasicFileHandler
+    constructor: (path) ->
+        super path
+
+    meta: (f) ->
+        _API.handler.fileinfo @path, f
+    
+    ls: (f) ->
+       return f(@) if @meta.type is "file"
+       _API.handler.scandir @path, f
+
+self.OS.API.VFS.RemoteFileHandler = RemoteFileHandler
+
+# Application Handler
+class ApplicationHandler extends self.OS.API.VFS.BasicFileHandler
+    constructor: (path) ->
+        super path
+
+self.OS.API.VFS.ApplicationHandler = ApplicationHandler
+
+
+# GoogleDrive File Handler
+class GoogleDriveHandler extends self.OS.API.VFS.BasicFileHandler
+    constructor: (path) ->
+        super path
+
+self.OS.API.VFS.GoogleDriveHandler = GoogleDriveHandler
\ No newline at end of file