Lua add metadata and settings reading helper module

Adds example scripts for reading track metadata + dumping albumart
and rockbox settings

settings are now stored as a table of strings rather than a table of tables
as it saves ~15 kb of ram without adding much complexity

Change-Id: I611c312b2a60ab96e595e4710b17aedbd6c0689b

1 files changed, 49 insertions, 0 deletions

diff --git a/apps/plugins/lua_scripts/dump_rbsettings.lua b/apps/plugins/lua_scripts/dump_rbsettings.lua
new file mode 100644
index 0000000000..2811d27487
--- /dev/null
+++ b/apps/plugins/lua_scripts/dump_rbsettings.lua
@@ -0,0 +1,49 @@
+require("rbsettings")
+require("settings")
+rb.metadata = nil -- remove track metadata settings
+-------------------------------------------------------------------------------
+
+local function print_setting_table(t_tbl, s_sep)
+    s_sep = s_sep or ""
+    local str = ""
+    local function pfunct(t, sep, s, n) -- recursive print function
+        local vtype
+        for k, v in pairs(t) do
+            vtype = type(v)
+            if vtype == "table" then
+                local f = string.format("%s[%s]", n, k)
+                s = pfunct(v, sep, s, f)
+            elseif vtype ==  "boolean" then
+                v = v and "true" or "false"
+                s = string.format("%s%s[%s] = %s%s", s, n, k, v, sep)
+            elseif v then
+                s = string.format("%s%s[%s] = %s%s", s, n, k, v, sep)
+            end
+        end
+        return s
+    end
+    return pfunct(t_tbl, s_sep, str, "")
+end
+
+local filename = "/settings.txt"
+local file = io.open(filename, "w+") -- overwrite
+local t_settings
+
+if not file then
+    rb.splash(rb.HZ, "Error writing " .. filename)
+    return
+end
+
+t_settings = rb.settings.dump('global_settings', "system")
+file:write("global_settings:\n")
+file:write(print_setting_table(t_settings, "\n"))
+file:write("\n\n")
+
+t_settings = rb.settings.dump('global_status', "system")
+file:write("global_status:\n")
+file:write(print_setting_table(t_settings, "\n"))
+file:write("\n\n")
+
+file:close()
+
+rb.splash(100, "rb settings dumped: " .. filename)