Added settings file reading and writing.

main.lua

@@ -4,6 +4,7 @@
 
 local love = require 'love'
 local game_states = require 'src.states'
+local settings = require 'src.utils.settings'
 local Fader = require 'src.utils.fader'
 
 
@@ -36,6 +37,9 @@ end
 function love.load(args)
     parse_args(args)
 
+    -- Obtain the settigns for the game.
+    settings:load_settings()
+
     -- Load the assets of the intro game state.
     game_states[Current_state]:load()
 
@@ -61,6 +65,9 @@ function love.update(dt)
         if Fade.done then
             game_states[Current_state]:unload(dt)
             love.event.quit()
+
+            -- Save the settings before quitting just in case.
+            settings:load_settings()
         end
     else
         -- If the new state exists then unload it's data and set the new state.

src/utils/mgclines.lua

@@ -0,0 +1,33 @@
+------------------------------------------------------------------------------
+-- Methods
+------------------------------------------------------------------------------
+
+-- From https://stackoverflow.com/a/19327160
+local function magiclines( str )
+    local pos
+    pos = 1
+
+    return function()
+        if not pos then return nil end
+
+        local  p1, p2 = string.find( str, "\r?\n", pos )
+        local line
+
+        if p1 then
+            line = str:sub( pos, p1 - 1 )
+            pos = p2 + 1
+        else
+            line = str:sub( pos )
+            pos = nil
+        end
+
+        return line
+    end
+end
+
+
+------------------------------------------------------------------------------
+-- Module return
+------------------------------------------------------------------------------
+
+return magiclines

src/utils/settings.lua

@@ -0,0 +1,114 @@
+------------------------------------------------------------------------------
+-- Imports
+------------------------------------------------------------------------------
+
+local love = require 'love'
+local magiclines = require 'src.utils.mgclines'
+
+
+------------------------------------------------------------------------------
+-- Constants
+------------------------------------------------------------------------------
+
+local SETTINGS_PATH = 'settings.ini'
+
+
+------------------------------------------------------------------------------
+-- Module definitions
+------------------------------------------------------------------------------
+
+local settings = {
+    permadeath=true,
+    forward='w',
+    backward='s',
+    stepleft='a',
+    stepright='d',
+    turnleft='q',
+    turnright='e',
+    musicvol=75,
+    soundvol=100,
+}
+
+
+------------------------------------------------------------------------------
+-- Private module methods
+------------------------------------------------------------------------------
+
+function settings:_parse_settings_str(s)
+    for line in magiclines(s) do
+        local k, v = string.match(line, '(%w+)=(.+)')
+
+        if k and v then
+            if self[k] ~= nil then
+                if v == 'true' then
+                    if type(self[k]) ~= 'boolean' then error(string.format('Invalid value for %s in settings', k)) end
+                    self[k] = true
+                elseif v == 'false' then
+                    if type(self[k]) ~= 'boolean' then error(string.format('Invalid value for %s in settings', k)) end
+                    self[k] = false
+                elseif tonumber(v) then
+                    if type(self[k]) ~= 'number' then error(string.format('Invalid value for %s in settings', k)) end
+                    self[k] = tonumber(v)
+                else
+                    self[k] = v
+                end
+            else
+                error(self[k])
+            end
+        end
+    end
+end
+
+
+function settings:_get_settings_str()
+    local s = '[settings]\n'
+
+    for k, v in pairs(self) do
+        if type(v) ~= 'function' then
+            s = s .. string.format('%s=%s\n', k, v)
+        end
+    end
+
+    return s
+end
+
+
+function settings:_open_or_create()
+    if not love.filesystem.exists(SETTINGS_PATH) then
+        local setts = self:_get_settings_str()
+        love.filesystem.write(SETTINGS_PATH, setts)
+        return setts
+    else
+        if not love.filesystem.isFile(SETTINGS_PATH) then
+            error ("Settings path exists and isn't a file")
+        else
+            return love.filesystem.read(SETTINGS_PATH)
+        end
+    end
+end
+
+
+------------------------------------------------------------------------------
+-- Public module methods
+------------------------------------------------------------------------------
+
+function settings:load_settings()
+    local s = self:_open_or_create()
+    self:_parse_settings_str(s)
+end
+
+
+function settings:save_settings()
+    if not love.filesystem.exists(SETTINGS_PATH) or love.filesystem.isFile(SETTINGS_PATH) then
+        love.filesystem.write(SETTINGS_PATH, self:_get_settings_str())
+    else
+        error("Settings path exists and isn't a file")
+    end
+end
+
+
+------------------------------------------------------------------------------
+-- Module return
+------------------------------------------------------------------------------
+
+return settings