1 files changed, 115 insertions, 0 deletions
diff --git a/script/files/files.lua b/script/files/files.lua
new file mode 100644
index 00000000..88ff7444
--- /dev/null
+++ b/script/files/files.lua
@@ -0,0 +1,115 @@
+local file = require 'files.file'
+
+---@class files
+local mt = {}
+mt.__index = mt
+mt.type = 'files'
+mt._fileCount = 0
+---@type table<uri, file>
+mt._files = nil
+
+---@param uri uri
+---@param text string
+function mt:save(uri, text, version)
+    local f = self._files[uri]
+    if not f then
+        f = file(uri)
+        self._files[uri] = f
+        self._fileCount = self._fileCount + 1
+    end
+    f:setText(text)
+    f:setVersion(version)
+end
+
+---@param uri uri
+function mt:remove(uri)
+    local f = self._files[uri]
+    if not f then
+        return
+    end
+
+    f:remove()
+    self._files[uri] = nil
+    self._fileCount = self._fileCount - 1
+end
+
+---@param uri uri
+function mt:open(uri, text)
+    self._open[uri] = text
+end
+
+---@param uri uri
+function mt:close(uri)
+    self._open[uri] = nil
+end
+
+---@param uri uri
+---@return boolean
+function mt:isOpen(uri)
+    return self._open[uri] ~= nil
+end
+
+---@param uri uri
+function mt:setLibrary(uri)
+    self._library[uri] = true
+end
+
+---@param uri uri
+---@return uri
+function mt:isLibrary(uri)
+    return self._library[uri] == true
+end
+
+---@param uri uri
+function mt:isDead(uri)
+    local f = self._files[uri]
+    if not f then
+        return true
+    end
+    if f:isRemoved() then
+        return true
+    end
+    return f:getVersion() == -1
+end
+
+---@param uri uri
+---@return file
+function mt:get(uri)
+    return self._files[uri]
+end
+
+function mt:clear()
+    for _, f in pairs(self._files) do
+        f:remove()
+    end
+    self._files = {}
+    self._library = {}
+    self._fileCount = nil
+end
+
+function mt:clearVM()
+    for _, f in pairs(self._files) do
+        f:removeVM()
+    end
+end
+
+function mt:eachFile()
+    return pairs(self._files)
+end
+
+function mt:eachOpened()
+    return pairs(self._open)
+end
+
+function mt:count()
+    return self._fileCount
+end
+
+return function ()
+    local self = setmetatable({
+        _files = {},
+        _open = {},
+        _library = {},
+    }, mt)
+    return self
+end