メモ的: Twitterのhome_timelineの情報を無理矢理4storeに入れてみる（いろんな意味でいろいろ間違ってるとは思う）

OAuthConsumerフレームワーク('#import <OAuthConsumer/OAuthConsumer.h>')についてはこちら．

4storeのクライアントライブラリ(っぽいなにか)('#import "FourStore.h"')についてはこちら．

#import "TwTurtleAppDelegate.h"
#import <OAuthConsumer/OAuthConsumer.h>
#import "FourStore.h"

@implementation TwTurtleAppDelegate

@synthesize window;

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
    OAConsumer *consumer = [[OAConsumer alloc] initWithKey:@"XXXXXXXXXXXXXXXXXXXXXX"
                                                    secret:@"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"];
    
    OAToken *accessToken= [[OAToken alloc] initWithKey:@"XXXXXXX-XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
                                                secret:@"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"];
        
    NSURL *url= [NSURL URLWithString:@"http://api.twitter.com/1/statuses/home_timeline.xml"];
    OAMutableURLRequest *requestWithBodyParams = [[[OAMutableURLRequest alloc] initWithURL:url
                                                                                  consumer:consumer
                                                                                     token:accessToken   
                                                                                     realm:nil   
                                                                         signatureProvider:nil] autorelease];
    
    OADataFetcher *fetcher = [[[OADataFetcher alloc] init] autorelease];
    
    [fetcher fetchDataWithRequest:requestWithBodyParams 
                         delegate:self
                didFinishSelector:@selector(apiTicket:didFinishWithData:)
                  didFailSelector:@selector(apiTicket:didFailWithError:)];
}
- (void)fourstoreWithTurtle:(NSString *)turtle
{
    FourStore *store= [[FourStore alloc] initWithEndpoint:@"http://localhost:8000/sparql/"];
    [store addPrefix:@"tsp" uri:@"http://example.org/twitter/status/predicate/"];
    [store addPrefix:@"tu" uri:@"http://example.org/twitter/users/"];
    
    NSString *message0= [store deleteWithGraph:@"http://example.org/twitter/status/"];
    NSLog(@"message0 %@", message0);
    
    
    NSString *message1= [store addTurtle:turtle graph:@"http://example.org/twitter/status/"];
    NSLog(@"message1 %@", message1);
    
    NSString *message2= [store queryWithString:
                         @"SELECT ?s ?p ?o \nWHERE {\nGRAPH <http://example.org/twitter/status/> {\n?s ?p ?o .\n}\n}\n"];
    NSLog(@"message2 \n%@", message2);
}
- (NSString *)createTurtleWithXMLData:(NSData *)data
{
    NSMutableString *turtle= [NSMutableString string];
    
    NSXMLDocument *document = [[[NSXMLDocument alloc] initWithData:data 
                                                           options:NSXMLDocumentTidyHTML 
                                                             error:NULL] autorelease];
    NSError *error= nil; 
    NSArray *nodes = [document nodesForXPath:@"//status" error:&error];
    NSEnumerator *nodesEnum= [nodes objectEnumerator];
    NSXMLNode *node= nil;
    while(node= [nodesEnum nextObject]) {
        NSArray *idnodes= [node nodesForXPath:@"id" error:&error];
        if ([idnodes count]==0) continue;
        NSString *idString= [[idnodes objectAtIndex:0] stringValue];
        NSEnumerator *childrenEnum= [[node children] objectEnumerator];
        NSXMLNode *child=nil;
        while(child= [childrenEnum nextObject]) {
            NSString *name= [child name];
            if ([name isEqualToString:@"id"])
                continue;
            NSString *value= nil;
            if ([name isEqualToString:@"retweeted_status"]){
                NSArray *cidnodes= [child nodesForXPath:@"id" error:&error];
                if ([cidnodes count]==0) continue;
                NSString *cidString= [[cidnodes objectAtIndex:0] stringValue];
                value= [NSString stringWithFormat:@"<%@>", cidString];
            } else if ([name isEqualToString:@"user"]){
                NSArray *cidnodes= [child nodesForXPath:@"id" error:&error];
                if ([cidnodes count]==0) continue;
                NSString *cidString= [[cidnodes objectAtIndex:0] stringValue];
                value= [NSString stringWithFormat:@"<tu:%@>", cidString];
            } else {
                if ([[child stringValue] length]==0) continue;
                value= [child stringValue];
                value= [value stringByReplacingOccurrencesOfString:@"\"" withString:@"\\\""];
                value= [value stringByReplacingOccurrencesOfString:@"\n" withString:@"\\n"];
                value= [NSString stringWithFormat:@"\"%@\"", value];
            }
            
            [turtle appendFormat:@"<%@> tsp:%@ %@ .\n", idString, name, value];
        }
    }

    return turtle;
}
- (void)apiTicket:(OAServiceTicket *)ticket 
didFinishWithData:(NSData *)data 
{
    if (0)
        NSLog(@"didFinish %@", [[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding] autorelease]);
    
    NSString *turtle= [self createTurtleWithXMLData:data];
    
    if (0)
        NSLog(@"\n%@", turtle);
    
    [self fourstoreWithTurtle:turtle];
}
- (void)apiTicket:(OAServiceTicket *)ticket 
 didFailWithError:(NSError *)error 
{
    NSLog(@"%@", error);
}
@end

やってみてアレコレ悩んだ足跡．