1 files changed, 47 insertions, 0 deletions
diff --git a/lib/utils.lua b/lib/utils.lua
new file mode 100644
index 0000000..909ec49
--- /dev/null
+++ b/lib/utils.lua
@@ -0,0 +1,47 @@
+local json = require "lib.json"
+
+local M = {}
+
+function M.get_palette()
+    local f = io.open("palette.json", "r")
+    if not f then error("couldn't open palette.json") end
+    local data = f:read("a")
+    f:close()
+    return json.decode(data)
+end
+
+-- This is taken from http://lua-users.org/wiki/SortedIteration
+-- This version is stripped of comments and empty lines + some stuff is renamed
+
+local function __gen_oindex(t)
+    local oindex = {}
+    for key in pairs(t) do
+        table.insert(oindex, key)
+    end
+    table.sort(oindex)
+    return oindex
+end
+
+function M.onext(t, state)
+    local key = nil
+    if state == nil then
+        t.__oindex = __gen_oindex(t)
+        key = t.__oindex[1]
+    else
+        for i = 1, #t.__oindex do
+            if t.__oindex[i] == state then
+                key = t.__oindex[i + 1]
+            end
+        end
+    end
+    if key then
+        return key, t[key]
+    end
+    t.__oindex = nil
+end
+
+function M.opairs(t)
+    return M.onext, t, nil
+end
+
+return M