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/*
* Copyright (C) by Jocelyn Turcotte <jturcotte@woboq.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#import "SyncClientProxy.h"
@protocol ServerProtocol <NSObject>
- (void)registerClient:(id)client;
@end
@interface SyncClientProxy ()
- (void)registerTransmitter:(id)tx;
@end
@implementation SyncClientProxy
- (instancetype)initWithDelegate:(id)arg1 serverName:(NSString*)serverName
{
self = [super init];
self.delegate = arg1;
_serverName = serverName;
_remoteEnd = nil;
return self;
}
#pragma mark - Connection setup
- (void)start
{
if (_remoteEnd)
return;
// Lookup the server connection
NSConnection *conn = [NSConnection connectionWithRegisteredName:_serverName host:nil];
if (!conn) {
// Could not connect to the sync client
[self scheduleRetry];
return;
}
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(connectionDidDie:)
name:NSConnectionDidDieNotification
object:conn];
NSDistantObject <ServerProtocol> *server = (NSDistantObject <ServerProtocol> *)[conn rootProxy];
assert(server);
// This saves a few Mach messages, enable "Distributed Objects" in the scheme's Run diagnostics to watch
[server setProtocolForProxy:@protocol(ServerProtocol)];
// Send an object to the server to act as the channel rx, we'll receive the tx through registerTransmitter
[server registerClient:self];
}
- (void)registerTransmitter:(id)tx;
{
// The server replied with the distant object that we will use for tx
_remoteEnd = (NSDistantObject <ChannelProtocol> *)tx;
[_remoteEnd setProtocolForProxy:@protocol(ChannelProtocol)];
// Everything is set up, start querying
[self askOnSocket:@"" query:@"GET_STRINGS"];
}
- (void)scheduleRetry
{
[NSTimer scheduledTimerWithTimeInterval:5 target:self selector:@selector(start) userInfo:nil repeats:NO];
}
- (void)connectionDidDie:(NSNotification*)notification
{
#pragma unused(notification)
_remoteEnd = nil;
[_delegate connectionDidDie];
[self scheduleRetry];
}
#pragma mark - Communication logic
- (void)sendMessage:(NSData*)msg
{
NSString *answer = [[NSString alloc] initWithData:msg encoding:NSUTF8StringEncoding];
// Cut the trailing newline
answer = [answer substringToIndex:[answer length] - 1];
NSArray *chunks = [answer componentsSeparatedByString: @":"];
if( [[chunks objectAtIndex:0] isEqualToString:@"STATUS"] ) {
NSString *result = [chunks objectAtIndex:1];
NSString *path = [chunks objectAtIndex:2];
if( [chunks count] > 3 ) {
for( int i = 2; i < [chunks count]-1; i++ ) {
path = [NSString stringWithFormat:@"%@:%@",
path, [chunks objectAtIndex:i+1] ];
}
}
[_delegate setResultForPath:path result:result];
} else if( [[chunks objectAtIndex:0] isEqualToString:@"UPDATE_VIEW"] ) {
NSString *path = [chunks objectAtIndex:1];
[_delegate reFetchFileNameCacheForPath:path];
} else if( [[chunks objectAtIndex:0 ] isEqualToString:@"REGISTER_PATH"] ) {
NSString *path = [chunks objectAtIndex:1];
[_delegate registerPath:path];
} else if( [[chunks objectAtIndex:0 ] isEqualToString:@"UNREGISTER_PATH"] ) {
NSString *path = [chunks objectAtIndex:1];
[_delegate unregisterPath:path];
} else if( [[chunks objectAtIndex:0 ] isEqualToString:@"GET_STRINGS"] ) {
// BEGIN and END messages, do nothing.
} else if( [[chunks objectAtIndex:0 ] isEqualToString:@"STRING"] ) {
[_delegate setString:[chunks objectAtIndex:1] value:[chunks objectAtIndex:2]];
} else {
NSLog(@"SyncState: Unknown command %@", [chunks objectAtIndex:0]);
}
}
- (void)askOnSocket:(NSString*)path query:(NSString*)verb
{
NSString *query = [NSString stringWithFormat:@"%@:%@\n", verb,path];
@try {
[_remoteEnd sendMessage:[query dataUsingEncoding:NSUTF8StringEncoding]];
} @catch(NSException* e) {
// Do nothing and wait for connectionDidDie
}
}
- (void)askForIcon:(NSString*)path isDirectory:(BOOL)isDir
{
NSString *verb = isDir ? @"RETRIEVE_FOLDER_STATUS" : @"RETRIEVE_FILE_STATUS";
[self askOnSocket:path query:verb];
}
@end
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