Compress all debug menu exports

Author: tmolitor-stud-tu

Monal/Classes/DebugView.swift

@@ -48,21 +48,21 @@ struct LogFilesView: View {
                 Section(header: Text("Logfiles")) {
                     ForEach(sortedLogFileInfos, id: \.self) { logFileInfo in
                         Button(logFileInfo.fileName) {
-                            fileURL = URL(fileURLWithPath: logFileInfo.filePath)
+                            self.fileURL = HelperTools.compressFile(atPath:logFileInfo.filePath, withLevel:9)
                         }
                     }
                 }
                 Section(header: Text("Database Files")) {
                     Button("Main Database") {
                         if let dbFile = DataLayer.sharedInstance().exportDB() {
-                            self.fileURL = URL(fileURLWithPath: dbFile)
+                            self.fileURL = HelperTools.compressFile(atPath:dbFile, withLevel:4)
                         } else {
                             showingDBExportFailedAlert = true
                         }
                     }
                     Button("IPC Database") {
                         if let dbFile = HelperTools.exportIPCDatabase() {
-                            self.fileURL = URL(fileURLWithPath: dbFile)
+                            self.fileURL = HelperTools.compressFile(atPath:dbFile, withLevel:4)
                         } else {
                             showingDBExportFailedAlert = true
                         }

Monal/Classes/HelperTools.h

@@ -231,6 +231,8 @@ void swizzle(Class c, SEL orig, SEL new);
 
 +(void) updateCurrentLogfilePath:(NSString*) logfilePath;
 
++(NSURL* _Nullable) compressFileAtPath:(NSString*) path withLevel:(NSInteger) level;
+
 @end
 
 NS_ASSUME_NONNULL_END

Monal/Classes/HelperTools.m

@@ -20,6 +20,7 @@
 #include <objc/runtime.h> 
 #include <objc/message.h>
 #include <objc/objc-exception.h>
+#import <zlib.h>
 #import <sys/qos.h>
 #import <BackgroundTasks/BackgroundTasks.h>
 #import <CommonCrypto/CommonDigest.h>
@@ -3303,4 +3304,67 @@ +(NSURLSession*) createEphemeralURLSession
     return [NSURLSession sessionWithConfiguration:sessionConfig];
 }
 
++(NSURL* _Nullable) compressFileAtPath:(NSString*) path withLevel:(NSInteger) level
+{
+    uint8_t buffer[65536];
+    
+    NSFileManager* fileManager = [NSFileManager defaultManager];
+    NSString* filename = path.lastPathComponent;
+    NSString* gzipPath = [NSTemporaryDirectory() stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.gz", filename]];
+    
+    DDLogInfo(@"Compressing file at '%@' into '%@'...", path, gzipPath);
+    
+    NSError* error = nil;
+    if([fileManager fileExistsAtPath:gzipPath])
+        [fileManager removeItemAtPath:gzipPath error:&error];
+    if(error != nil)
+    {
+        DDLogError(@"Could not delete old leftover gzip file at '%@': %@", gzipPath, error);
+        return nil;
+    }
+    
+    NSInputStream* input = [NSInputStream inputStreamWithFileAtPath:path];
+    if(!input)
+    {
+        DDLogError(@"Could not open file to compress: %@", path);
+        return nil;
+    }
+    [input open];
+    
+    FILE* outputFile = fopen([gzipPath fileSystemRepresentation], "wb");
+    if(!outputFile)
+    {
+        DDLogError(@"Could not open gzip output file: %@", gzipPath);
+        [input close];
+        return nil;
+    }
+    
+    gzFile gzOutput = gzdopen(fileno(outputFile), [NSString stringWithFormat:@"%ldwb", (long)level].UTF8String);
+    if(!gzOutput)
+    {
+        DDLogError(@"Could not create gzip stream for output file: %@", gzipPath);
+        fclose(outputFile);
+        [input close];
+        return nil;
+    }
+    
+    NSInteger bytesRead;
+    while((bytesRead = [input read:buffer maxLength:sizeof(buffer)]) > 0)
+    {
+        if(gzwrite(gzOutput, buffer, (unsigned int)bytesRead) != bytesRead)
+        {
+            DDLogError(@"Failed to write gzip data to output file: %@", gzipPath);
+            gzclose(gzOutput);
+            [input close];
+            return nil;
+        }
+    }
+    
+    gzclose(gzOutput);
+    [input close];
+    
+    return [NSURL fileURLWithPath:gzipPath];
+    
+}
+
 @end