Fix query processing for yabai v4.0.0 (#1)

* fix query processing for yabai v4.0.0

* add yabai compatibility to readme

CHANGELOG.md

@@ -1,3 +1,10 @@
+## v0.2.0 - 30 Sep 2022
+
+### Changes
+
+- Fix processing of yabai query result to accomodate new data format
+  (see https://github.com/koekeishiya/yabai/issues/775)
+
 ## v0.1.2 - 13 Jan 2022
 
 ### Changes

README.md

@@ -7,8 +7,11 @@ A simple menu bar spaces indicator for the yabai window manager, written for Ham
 ## Installation
 
 Compatibility:
-- Tested on Big Sur (macOS 11).
-- Not tested on Monterery (macOS 12).
+- yabai
+  - Tested on v4.0.0^.
+  - Untested on v5.0.0^.
+- macOS
+  - Tested on Monterery (macOS 12).
 
 Prerequisites:
 - Install and configure [yabai](https://github.com/koekeishiya/yabai).

yabai-bar.lua

@@ -10,7 +10,9 @@ end
 
 local YabaiBar = {}
 
--- Constructor
+-- Constructor.
+-- Params:
+--   exec - the absolute path of the yabai executable to use
 function YabaiBar:new(exec)
     local yabaiBar = {
         bar = hs.menubar.new(),
@@ -43,9 +45,9 @@ function YabaiBar:new(exec)
     return setmetatable(yabaiBar, self)
 end
 
--- Update
+-- Updates the bar by querying yabai.
 function YabaiBar:update()
-    hs.task.new(self.exec, function(exitCode, stdOut, stdErr)
+    hs.task.new(self.exec, function(exitCode, stdOut, _)
         if exitCode ~= 0 then return end
 
         local spaces = hs.json.decode(stdOut)
@@ -56,10 +58,10 @@ function YabaiBar:update()
         local nums = {}
 
         for i = 1, #spaces do
-            if spaces[i].focused == 1 then
+            if spaces[i]["has-focus"] then
                 -- Focused
                 nums[i] = hs.styledtext.new(i, self.focusedStyle)
-            elseif spaces[i].visible == 1 then
+            elseif spaces[i]["is-visible"] then
                 -- Not focused, but visible
                 nums[i] = hs.styledtext.new(i, self.visibleStyle)
             elseif spaces[i]["first-window"] ~= 0 then