add last-opened-directory addon (#95)

Author: CogentRedTester

addons/last-open-directory.lua

@@ -0,0 +1,56 @@
+--[[
+    An addon for mpv-file-browser which stores the last opened directory and
+    sets it as the opened directory the next time mpv is opened.
+
+    Available at: https://github.com/CogentRedTester/mpv-file-browser/tree/master/addons
+]]--
+
+local mp = require 'mp'
+local msg = require 'mp.msg'
+
+local fb = require 'file-browser'
+
+local state_file = mp.command_native({'expand-path', '~~state/last_opened_directory'})
+msg.verbose('using', state_file)
+
+local function write_directory(directory)
+    local file = io.open(state_file, 'w+')
+
+    if not file then return msg.error('could not open', state_file, 'for writing') end
+
+    directory = directory or fb.get_directory()
+    msg.verbose('writing', directory, 'to', state_file)
+    file:write(directory)
+    file:close()
+end
+
+
+local addon = {
+    version = '1.7.0',
+    priority = 0,
+}
+
+function addon:setup()
+    local file = io.open(state_file, "r")
+    if not file then
+        return msg.error('failed to open', state_file, 'for reading')
+    end
+
+    local dir = file:read("*a")
+    msg.verbose('setting default directory to', dir)
+    fb.browse_directory(dir, false)
+    file:close()
+end
+
+function addon:can_parse(dir, parse_state)
+    if parse_state.source == 'browser' then write_directory(dir) end
+    return false
+end
+
+function addon:parse()
+    return nil
+end
+
+mp.register_event('shutdown', function() write_directory() end)
+
+return addon