// ==UserScript==
// @name        Steam JS fix
// @version     9
// @author      Bladru
// @description Patches unsupported syntax
// @include     *://store.steampowered.com/*
// @include     *://steamcommunity.com/*
// ==/UserScript==

/*
Opera only. Save as "Steam_js_fix.js" (without .user).
*/

(function(){

window.opera.addEventListener("BeforeScript", patch_scripts);
function patch_scripts(UserJSEvent){
	var script = UserJSEvent.element;
	
	var regex_let = /\blet\b/g;
	
	var for_of = "for ( var mutation of mutationsList )";
	var for_in = "for ( var mutation in mutationsList )";
	
	var regex_for_of = /for \( item of result\.purchase_receipt_info\.line_items \)\s+{/;
	var patched_for_of = "for ( i in result.purchase_receipt_info.line_items ) { var item = result.purchase_receipt_info.line_items[i];";
	
	var regex_function_el = /AddSNRDepthParamsToCapsuleList\( \$Capsules \)\s+{/;
	var patched_function_el = "AddSNRDepthParamsToCapsuleList: function( $Capsules ){";
	
	if ((script.src.indexOf("/gamehighlightplayer.js") != -1 
	|| script.src.indexOf("/main.js") != -1 
	|| script.src.indexOf("/salefunctions.js") != -1
	) && regex_let.test(script.text)){
		script.text = script.text.replace(regex_let, "var");
		console.log("'let' statement replaced with 'var' in " + script.src);
	}
	else if (script.src.indexOf("/shared_global.js") != -1 && script.text.indexOf(for_of) != -1){
		/* patched function throws exception either way */
		script.text = script.text.replace(for_of, for_in);
		console.log("'for .. of' statement replaced with 'for .. in' in " + script.src);
	}
	else if (script.src.indexOf("/registerkey.js") != -1 && regex_for_of.test(script.text)){
		script.text = script.text.replace(regex_for_of, patched_for_of);
		console.log("'for .. of' statement replaced with 'for .. in' in " + script.src);
	}
	else if (script.src.indexOf("/dynamicstore.js") != -1 && regex_function_el.test(script.text)){
		script.text = script.text.replace(regex_function_el, patched_function_el);
		console.log("AddSNRDepthParamsToCapsuleList declaration fixed in " + script.src);
	}
	else if (script.src.indexOf("/game.js") != -1){
		script.text = script.text.replace("console.log( `#${i}", "//console.log( `#${i}");
	}
}

})();