From 20d28e80a5c861a9d5f449ea911ab75b4f37ad0d Mon Sep 17 00:00:00 2001
From: Jef <jef@targetspot.com>
Date: Tue, 24 Sep 2024 14:54:57 +0200
Subject: Initial community commit

---
 Src/Plugins/Library/ml_online/handler.cpp | 168 ++++++++++++++++++++++++++++++
 1 file changed, 168 insertions(+)
 create mode 100644 Src/Plugins/Library/ml_online/handler.cpp

(limited to 'Src/Plugins/Library/ml_online/handler.cpp')

diff --git a/Src/Plugins/Library/ml_online/handler.cpp b/Src/Plugins/Library/ml_online/handler.cpp
new file mode 100644
index 00000000..2191725e
--- /dev/null
+++ b/Src/Plugins/Library/ml_online/handler.cpp
@@ -0,0 +1,168 @@
+#include "main.h"
+#include "navigation.h"
+#include "servicehelper.h"
+#include "handler.h"
+#include "ifc_omservice.h"
+#include "../Agave/URIHandler/svc_urihandler.h"
+#include <api/service/waservicefactory.h>
+#include "api.h"
+
+#include <shlwapi.h>
+
+static uint8_t quickhex(wchar_t c)
+{
+	int hexvalue = c;
+	if (hexvalue & 0x10)
+		hexvalue &= ~0x30;
+	else
+	{
+		hexvalue &= 0xF;
+		hexvalue += 9;
+	}
+	return hexvalue;
+}
+
+static uint8_t DecodeEscape(const wchar_t *&str)
+{
+	uint8_t a = quickhex(*++str);
+	uint8_t b = quickhex(*++str);
+	str++;
+	return a * 16 + b;
+}
+
+static void DecodeEscapedUTF8(wchar_t *&output, const wchar_t *&input)
+{
+	uint8_t utf8_data[1024] = {0}; // hopefully big enough!!
+	int num_utf8_words=0;
+	bool error=false;
+
+	while (input && *input == '%' && num_utf8_words < sizeof(utf8_data))
+	{
+		if (iswxdigit(input[1]) && iswxdigit(input[2]))
+		{
+			utf8_data[num_utf8_words++]=DecodeEscape(input);
+		}
+		else if (input[1] == '%')
+		{
+			input+=2;
+			utf8_data[num_utf8_words++]='%';
+		}
+		else
+		{
+			error = true;
+			break;
+		}
+	}
+
+	int len = MultiByteToWideChar(CP_UTF8, 0, (LPCSTR)utf8_data, num_utf8_words, 0, 0);
+	MultiByteToWideChar(CP_UTF8, 0, (LPCSTR)utf8_data, num_utf8_words, output, len);
+	output += len;
+
+	if (error)
+	{
+		*output++ = *input++;
+	}
+}
+
+static void UrlDecode(const wchar_t *input, wchar_t *output, size_t len)
+{
+	const wchar_t *stop = output+len-4; // give ourself a cushion large enough to hold a full UTF-16 sequence
+	const wchar_t *itr = input;
+	while (itr && *itr)
+	{
+		if (output >= stop)
+		{
+			*output=0;
+			return;
+		}
+
+		switch (*itr)
+		{
+			case '%':
+				DecodeEscapedUTF8(output, itr);
+				break;
+			case '&':
+				*output = 0;
+				return;
+			default:
+				*output++ = *itr++;
+				break;
+		}
+	}
+	*output = 0;
+}
+// first parameter has param name either null or = terminated, second is null terminated
+static bool ParamCompare(const wchar_t *url_param, const wchar_t *param_name)
+{
+	while (url_param && *url_param && *param_name && *url_param!=L'=')
+	{
+		if (*url_param++ != *param_name++)
+			return false;
+	}
+	return true;
+}
+
+static bool get_request_parm(const wchar_t *params, const wchar_t *param_name, wchar_t *value, size_t value_len)
+{
+	const wchar_t *t=params;
+	while (t && *t && *t != L'?')  // find start of parameters
+		t++;
+  
+	while (t && *t)
+	{
+		t++; // skip ? or &
+		if (ParamCompare(t, param_name))
+		{
+			while (t && *t && *t != L'=' && *t != '&')  // find start of value
+				t++;
+			switch(*t)
+			{
+			case L'=':
+				UrlDecode(++t, value, value_len);
+					return true;
+					case 0:
+			case L'&': // no value
+				*value=0;
+				return true;
+			default: // shouldn't get here
+				return false;
+			}
+		}
+		while (t && *t && *t != L'&')  // find next parameter
+		t++;
+	}
+	return false;
+}
+
+int OnlineServicesURIHandler::ProcessFilename(const wchar_t *filename)
+{
+	if (HANDLED != IsMine(filename))
+		return NOT_HANDLED;
+
+	UINT serviceId = 0;
+	wchar_t szBuffer[512]=L"";
+	if (get_request_parm(filename, L"id", szBuffer, ARRAYSIZE(szBuffer)) && 
+		L'\0' != szBuffer[0])
+	{
+		if (FALSE == StrToIntEx(szBuffer, STIF_SUPPORT_HEX, (INT*)&serviceId))
+			serviceId = 0;
+	}
+
+	ServiceHelper_ShowService(serviceId, SHOWMODE_ENSUREVISIBLE);
+	return HANDLED_EXCLUSIVE;
+}
+
+int OnlineServicesURIHandler::IsMine(const wchar_t *filename)
+{
+	if (!_wcsnicmp(filename, L"winamp://Online Services", 24) || !_wcsnicmp(filename, L"winamp://Online%20Services", 26))
+		return HANDLED;
+	else
+		return NOT_HANDLED;
+}
+
+#define CBCLASS OnlineServicesURIHandler
+START_DISPATCH;
+CB(PROCESSFILENAME, ProcessFilename);
+CB(ISMINE, IsMine);
+END_DISPATCH;
+#undef CBCLASS
\ No newline at end of file
-- 
cgit