From 710efd3194c05043ec27b8e0258387082f834b7b Mon Sep 17 00:00:00 2001
From: LoRd_MuldeR <mulder2@gmx.de>
Date: Sun, 18 Mar 2018 14:13:54 +0100
Subject: [PATCH] Check installed version. Abort if installed version is newer
 than setup version. Ask whether to proceed if installed version is the same
 as setup version.

---
 Language/MPUI_DE.nsh |  2 ++
 Language/MPUI_EN.nsh |  2 ++
 MPUI_Setup.nsi       | 20 ++++++++++++++++++++
 3 files changed, 24 insertions(+)

diff --git a/Language/MPUI_DE.nsh b/Language/MPUI_DE.nsh
index 81f9515..637116b 100644
--- a/Language/MPUI_DE.nsh
+++ b/Language/MPUI_DE.nsh
@@ -22,10 +22,12 @@
 LangString MPLAYER_LANG_APPLYING_TWEAKS          ${LANG_GERMAN} "Anpassungen werden gerade übernommen..."
 LangString MPLAYER_LANG_AUTO_UPDATE              ${LANG_GERMAN} "Auto-Update"
 LangString MPLAYER_LANG_BIN_CODECS               ${LANG_GERMAN} "Binäre Codecs"
+LangString MPLAYER_LANG_CAN_NOT_UPDATE           ${LANG_GERMAN} "Auf Ihrem System ist bereits eine Version von MPlayer für Windows installiert, die neuer als dieses Setup-Paket ist. Ein Update ist daher nicht möglich. Setup wird jetzt!"
 LangString MPLAYER_LANG_COMPRESS_FILES           ${LANG_GERMAN} "Programmdateien optimieren"
 LangString MPLAYER_LANG_COMPRESSING              ${LANG_GERMAN} "Optimiere:"
 LangString MPLAYER_LANG_CONFIG_MPUI              ${LANG_GERMAN} "Fehler beim Schreiben der MPUI Konfigurationsdatei!"
 LangString MPLAYER_LANG_CONFIG_SMPLAYER          ${LANG_GERMAN} "Fehler beim Schreiben der SMPlayer Konfigurationsdatei!"
+LangString MPLAYER_LANG_CONFIRM_UPDATE           ${LANG_GERMAN} "Auf Ihrem System ist bereits eine Version von MPlayer für Windows installiert, die der Version dieses Setup-Pakets entspricht. Möchten Sie dennoch fortfahren?"
 LangString MPLAYER_LANG_DETECTING                ${LANG_GERMAN} "CPU-Typ wird ermittelt..."
 LangString MPLAYER_LANG_DL_ABORTED               ${LANG_GERMAN} "Download wurde abgebrochen!"
 LangString MPLAYER_LANG_DL_COMPELETED            ${LANG_GERMAN} "Download vollständig."
diff --git a/Language/MPUI_EN.nsh b/Language/MPUI_EN.nsh
index cb6ee91..4ee9f0a 100644
--- a/Language/MPUI_EN.nsh
+++ b/Language/MPUI_EN.nsh
@@ -22,10 +22,12 @@
 LangString MPLAYER_LANG_APPLYING_TWEAKS          ${LANG_ENGLISH} "Tweaks are being applied..."
 LangString MPLAYER_LANG_AUTO_UPDATE              ${LANG_ENGLISH} "Auto-Update"
 LangString MPLAYER_LANG_BIN_CODECS               ${LANG_ENGLISH} "Binary Codecs"
+LangString MPLAYER_LANG_CAN_NOT_UPDATE           ${LANG_ENGLISH} "The version of MPlayer for Windows currently installed on your computer is newer than the version contained in this installation package. Setup will exist now!"
 LangString MPLAYER_LANG_COMPRESS_FILES           ${LANG_ENGLISH} "Optimize program files"
 LangString MPLAYER_LANG_COMPRESSING              ${LANG_ENGLISH} "Optimizing"
 LangString MPLAYER_LANG_CONFIG_MPUI              ${LANG_ENGLISH} "Faild to write MPUI configuration file!"
 LangString MPLAYER_LANG_CONFIG_SMPLAYER          ${LANG_ENGLISH} "Faild to write SMPlayer configuration file!"
+LangString MPLAYER_LANG_CONFIRM_UPDATE           ${LANG_ENGLISH} "The version of MPlayer for Windows currently installed on your computer is the same as the version contained in this installation package. Do you want to proceed anyway?"
 LangString MPLAYER_LANG_DETECTING                ${LANG_ENGLISH} "Detetcing CPU type..."
 LangString MPLAYER_LANG_DL_ABORTED               ${LANG_ENGLISH} "Download was aborted!"
 LangString MPLAYER_LANG_DL_COMPELETED            ${LANG_ENGLISH} "Download completed."
diff --git a/MPUI_Setup.nsi b/MPUI_Setup.nsi
index 6918087..2fc35ca 100644
--- a/MPUI_Setup.nsi
+++ b/MPUI_Setup.nsi
@@ -364,6 +364,16 @@ FunctionEnd
 ; INSTALL SECTIONS
 ;--------------------------------------------------------------------------------
 
+Section "-Check Current Version"
+	${If} ${FileExists} "$INSTDIR\version.tag"
+		ReadINIStr $0 "$INSTDIR\version.tag" "mplayer_version" "build_no"
+		${If} $0 > ${MPLAYER_BUILDNO}
+			MessageBox MB_OK|MB_ICONEXCLAMATION|MB_TOPMOST "$(MPLAYER_LANG_CAN_NOT_UPDATE)"
+			Quit
+		${EndIf}
+	${EndIf}
+SectionEnd
+
 Section "-Clean Up"
 	${PrintProgress} "$(MPLAYER_LANG_STATUS_INST_CLEAN)"
 
@@ -1152,6 +1162,16 @@ Function CheckForUpdate
 	${EndIf}
 	
 	${If} ${FileExists} "$INSTDIR\MPlayer.exe"
+		${If} ${FileExists} "$INSTDIR\version.tag"
+			ReadINIStr $0 "$INSTDIR\version.tag" "mplayer_version" "build_no"
+			${If} $0 > ${MPLAYER_BUILDNO}
+				MessageBox MB_OK|MB_ICONEXCLAMATION "$(MPLAYER_LANG_CAN_NOT_UPDATE)"
+				Quit
+			${EndIf}
+			${If} $0 = ${MPLAYER_BUILDNO}
+				${IfCmd} MessageBox MB_YESNO|MB_ICONEXCLAMATION "$(MPLAYER_LANG_CONFIRM_UPDATE)" /SD IDYES IDNO ${||} Quit ${|}
+			${EndIf}
+		${EndIf}
 		!insertmacro EnablePathEditable 0 1
 		Return
 	${EndIf}
-- 
2.11.4.GIT