Reorganization

reframework/autorun/MHR_Overlay/Misc/table_helpers.lua

@@ -0,0 +1,82 @@
+local table_helpers = {};
+
+function table_helpers.deep_copy(original, copies)
+	copies = copies or {};
+	local original_type = type(original);
+	local copy;
+	if original_type == 'table' then
+		if copies[original] then
+			copy = copies[original];
+		else
+			copy = {};
+			copies[original] = copy;
+			for original_key, original_value in next, original, nil do
+				copy[table_helpers.deep_copy(original_key, copies)] = table_helpers.deep_copy(original_value, copies);
+			end
+			setmetatable(copy, table_helpers.deep_copy(getmetatable(original), copies));
+		end
+	else -- number, string, boolean, etc
+		copy = original;
+	end
+	return copy;
+end
+
+function table_helpers.find_index(table, value, nullable)
+	for i = 1, #table do
+		if table[i] == value then
+			return i;
+		end
+	end
+
+	if not nullable then
+		return 1;
+	end
+
+	return nil;
+end
+
+function table_helpers.merge(...)
+	local tables_to_merge = {...};
+	assert(#tables_to_merge > 1, "There should be at least two tables to merge them");
+
+	for key, table in ipairs(tables_to_merge) do
+		assert(type(table) == "table", string.format("Expected a table as function parameter %d", key));
+	end
+
+	local result = table_helpers.deep_copy(tables_to_merge[1]);
+
+	for i = 2, #tables_to_merge do
+		local from = tables_to_merge[i];
+		for key, value in pairs(from) do
+			if type(value) == "table" then
+				result[key] = result[key] or {};
+				assert(type(result[key]) == "table", string.format("Expected a table: '%s'", key));
+				result[key] = table_helpers.merge(result[key], value);
+			else
+				result[key] = value;
+			end
+		end
+	end
+
+	return result;
+end
+
+function table_helpers.tostring(table)
+	if type(table) == 'table' then
+		local s = '{ \n';
+		for k,v in pairs(table) do
+			if type(k) ~= 'number' then
+				k = '"' .. k .. '"';
+			end
+			s = s .. '\t['..k..'] = ' .. table_helpers.tostring(v) .. ',\n';
+		end
+		return s .. '} \n';
+	else
+		return tostring(table);
+	end
+end
+
+function table_helpers.init_module()
+end
+
+return table_helpers;