1 files changed, 67 insertions, 1 deletions
diff --git a/myhighscore/api.lua b/myhighscore/api.lua
index bbad4d7..f1e84f8 100755
--- a/myhighscore/api.lua
+++ b/myhighscore/api.lua
@@ -1,9 +1,75 @@
 
+-- Store any information we might need for the games that will use highscore
+-- (icons, description, or whatever)
 myhighscore.registered_games = {}
 
+-- This table will contain a table for each registered game which
+-- will be an array of player scores
+myhighscore.scores = {}
+
+-- How many scores to keep saved per game
+local stored_scores = 50
+
+-- Name of the folder to save the scores to
+-- each game highscore list will be saved in a file inside this directory
+local score_directory = minetest.get_worldpath().."/myhighscores/"
 
 -- You can register a new arcade game using this function
-myhighscore.register_game(name, definition)
+-- The definition will get added to the table of registered games.
+function myhighscore.register_game(name, definition)
 	definition.description = definition.description or name
 	myhighscore.registered_games[name] = definition
+	myhighscore.load_scores(name)
+end
+
+-- Returns true if score from A is smaller than score from B
+-- Used for sorting the score arra
+function myhighscore.is_score_higher(scoreA, scoreB)
+	return scoreA.score > scoreB.score
+end
+
+-- Saves a given score for the given game. "score" will be a table containing at least:
+--  player (player name) and score (points)
+function myhighscore.save_score(name, score)
+	local scores = myhighscore.scores[name]
+
+	-- Check first if the last score is higher
+	if scores[stored_scores] and
+		myhighscore.is_score_higher(scores[stored_scores], score) then
+		return false
+	end
+
+	table.insert(scores, score)
+	-- sort the array
+	table.sort(scores, myhighscore.is_score_higher)
+	-- check position and remove any extra ones
+	local pos = 0
+	for i,sc in pairs(scores) do
+		if sc == score then
+			pos = i
+		elseif i > stored_scores then
+			scores[i] = nil
+		end
+	end
+	-- save it to disk
+	local f, err = io.open(score_directory .. name, "w")
+	f:write(minetest.serialize(scores))
+	f:close()
+	-- return the position we hold on the list
+	return pos
+end
+
+
+-- Read scores from disk for the given game, or initialize the scores table if not present
+function myhighscore.load_scores(name)
+	local f, err = io.open(score_directory .. name, "r")
+	local data = {}
+	if f then
+		data = minetest.deserialize(f:read("*a")) or {}
+		f:close()
+	end
+	myhighscore.scores[name] = data
 end
+
+-- Create the scores directory if it doesn't exist!
+minetest.mkdir(score_directory)