adium/adium

No more t.co links! (Well, almost none).
adium-1.6
2013-03-23, Frank Dowsett
7d45cfb6ae92
Parents 51084cf32f39
Children ca83a87cff60
No more t.co links! (Well, almost none).

Use the entities that Twitter sends to parse and link URLs, users, and hashtags. Fixes #13947
5 files changed, 97 insertions(+), 215 deletions(-)
  • +0 -6
    Adium.xcodeproj/project.pbxproj
  • +1 -1
    Plugins/Twitter Plugin/AITwitterAccount.h
  • +96 -91
    Plugins/Twitter Plugin/AITwitterAccount.m
  • +0 -29
    Plugins/Twitter Plugin/AITwitterURLParser.h
  • +0 -88
    Plugins/Twitter Plugin/AITwitterURLParser.m
    • --- a/Adium.xcodeproj/project.pbxproj Sat Mar 23 21:49:08 2013 -0400
    +++ b/Adium.xcodeproj/project.pbxproj Sat Mar 23 22:15:45 2013 -0400
    @@ -113,7 +113,6 @@
    113900B40F85BF880081A418 /* AIURLHandlerWindowController.m in Sources */ = {isa = PBXBuildFile; fileRef = 113900B30F85BF880081A418 /* AIURLHandlerWindowController.m */; };
    1139011C0F85C9450081A418 /* AIURLHandlerPlugin.m in Sources */ = {isa = PBXBuildFile; fileRef = 1139011B0F85C9450081A418 /* AIURLHandlerPlugin.m */; };
    1139FFAA0F85260E0081A418 /* AIIRCChannelLinker.m in Sources */ = {isa = PBXBuildFile; fileRef = 1139FFA90F85260E0081A418 /* AIIRCChannelLinker.m */; };
    - 113F26A00F5CC03F00954772 /* AITwitterURLParser.m in Sources */ = {isa = PBXBuildFile; fileRef = 113F269F0F5CC03F00954772 /* AITwitterURLParser.m */; };
    114849B90F7841C600EA5264 /* AIAuthorizationRequestsWindowController.h in Headers */ = {isa = PBXBuildFile; fileRef = 114849B70F7841C600EA5264 /* AIAuthorizationRequestsWindowController.h */; settings = {ATTRIBUTES = (Public, ); }; };
    114849BA0F7841C600EA5264 /* AIAuthorizationRequestsWindowController.m in Sources */ = {isa = PBXBuildFile; fileRef = 114849B80F7841C600EA5264 /* AIAuthorizationRequestsWindowController.m */; };
    114849BC0F78420300EA5264 /* AIAuthorizationRequestsWindow.xib in Resources */ = {isa = PBXBuildFile; fileRef = 114849BB0F78420300EA5264 /* AIAuthorizationRequestsWindow.xib */; };
    @@ -1837,8 +1836,6 @@
    1139FFA90F85260E0081A418 /* AIIRCChannelLinker.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = AIIRCChannelLinker.m; path = Source/AIIRCChannelLinker.m; sourceTree = "<group>"; };
    113E06A910D0ABA0005D5B9A /* adiumPurpleMedia.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = adiumPurpleMedia.m; path = "Plugins/Purple Service/adiumPurpleMedia.m"; sourceTree = "<group>"; };
    113E06AE10D0ABE3005D5B9A /* adiumPurpleMedia.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = adiumPurpleMedia.h; path = "Plugins/Purple Service/adiumPurpleMedia.h"; sourceTree = "<group>"; };
    - 113F269E0F5CC03F00954772 /* AITwitterURLParser.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = AITwitterURLParser.h; path = "Plugins/Twitter Plugin/AITwitterURLParser.h"; sourceTree = "<group>"; };
    - 113F269F0F5CC03F00954772 /* AITwitterURLParser.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = AITwitterURLParser.m; path = "Plugins/Twitter Plugin/AITwitterURLParser.m"; sourceTree = "<group>"; };
    1147FCC210D1CB4C004E9E8D /* AIMediaWindowController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = AIMediaWindowController.h; path = Source/AIMediaWindowController.h; sourceTree = "<group>"; };
    1147FCC310D1CB4C004E9E8D /* AIMediaWindowController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = AIMediaWindowController.m; path = Source/AIMediaWindowController.m; sourceTree = "<group>"; };
    1147FCC710D1CB83004E9E8D /* AIMediaWindow.xib */ = {isa = PBXFileReference; lastKnownFileType = wrapper.xib; name = AIMediaWindow.xib; path = Resources/AIMediaWindow.xib; sourceTree = "<group>"; };
    @@ -5050,8 +5047,6 @@
    11BD73D20F5A54BB007D438A /* twitter.png */,
    EFB1C3120DDBDA3100B3973D /* AITwitterIMPlugin.h */,
    EFB1C3130DDBDA3100B3973D /* AITwitterIMPlugin.m */,
    - 113F269E0F5CC03F00954772 /* AITwitterURLParser.h */,
    - 113F269F0F5CC03F00954772 /* AITwitterURLParser.m */,
    112523170F5F7F86003FC58A /* AITwitterURLHandler.h */,
    112523180F5F7F86003FC58A /* AITwitterURLHandler.m */,
    11F738FA0F58D19B00B3285B /* AITwitterPlugin.h */,
    @@ -10523,7 +10518,6 @@
    11F738F90F58D18700B3285B /* AITwitterService.m in Sources */,
    11F738FC0F58D19B00B3285B /* AITwitterPlugin.m in Sources */,
    11F739020F58D1C400B3285B /* AITwitterAccountViewController.m in Sources */,
    - 113F26A00F5CC03F00954772 /* AITwitterURLParser.m in Sources */,
    112523190F5F7F86003FC58A /* AITwitterURLHandler.m in Sources */,
    1109661A0F61D3E70064CA0E /* AITwitterReplyWindowController.m in Sources */,
    1163F0EC0F6C7A8300F12F5D /* AIURLShortenerPlugin.m in Sources */,
    --- a/Plugins/Twitter Plugin/AITwitterAccount.h Sat Mar 23 21:49:08 2013 -0400
    +++ b/Plugins/Twitter Plugin/AITwitterAccount.h Sat Mar 23 22:15:45 2013 -0400
    @@ -193,7 +193,7 @@
    - (void)destroyDirectMessage:(NSString *)messageID
    forUser:(NSString *)userID;
    -- (NSAttributedString *)linkifiedAttributedStringFromString:(NSAttributedString *)inString;
    +- (void)linkifyEntities:(NSArray *)entities inString:(NSMutableAttributedString **)inString forLinkType:(AITwitterLinkType)linkType;
    - (NSString *)addressForLinkType:(AITwitterLinkType)linkType
    userID:(NSString *)userID
    --- a/Plugins/Twitter Plugin/AITwitterAccount.m Sat Mar 23 21:49:08 2013 -0400
    +++ b/Plugins/Twitter Plugin/AITwitterAccount.m Sat Mar 23 22:15:45 2013 -0400
    @@ -15,7 +15,6 @@
    */
    #import "AITwitterAccount.h"
    -#import "AITwitterURLParser.h"
    #import "AITwitterReplyWindowController.h"
    #import <AIUtilities/AIAttributedStringAdditions.h>
    #import <AIUtilities/AIStringAdditions.h>
    @@ -43,11 +42,11 @@
    - (void)updateTimelineChat:(AIGroupChat *)timelineChat;
    -- (NSAttributedString *)parseMessage:(NSString *)inMessage
    - tweetID:(NSString *)tweetID
    - userID:(NSString *)userID
    - inReplyToUser:(NSString *)replyUserID
    - inReplyToTweetID:(NSString *)replyTweetID;
    +- (NSAttributedString *)parseStatus:(NSDictionary *)inStatus
    + tweetID:(NSString *)tweetID
    + userID:(NSString *)userID
    + inReplyToUser:(NSString *)replyUserID
    + inReplyToTweetID:(NSString *)replyTweetID;
    - (NSAttributedString *)parseDirectMessage:(NSString *)inMessage
    withID:(NSString *)dmID
    fromUser:(NSString *)sourceUID;
    @@ -623,21 +622,11 @@
    AILogWithSignature(@"%@ Updating statuses for profile, user %@", self, inContact);
    for (NSDictionary *update in statuses) {
    - NSAttributedString *message;
    - NSDictionary *retweet = [update valueForKey:TWITTER_STATUS_RETWEET];
    - NSString *text = [update objectForKey:TWITTER_STATUS_TEXT];
    -
    - if (retweet && [retweet isKindOfClass:[NSDictionary class]]) {
    - text = [NSString stringWithFormat:@"RT @%@: %@",
    - [[retweet objectForKey:TWITTER_STATUS_USER] objectForKey:TWITTER_STATUS_UID],
    - [retweet objectForKey:TWITTER_STATUS_TEXT]];
    - }
    -
    - message = [self parseMessage:text
    - tweetID:[update objectForKey:TWITTER_STATUS_ID]
    - userID:inContact.UID
    - inReplyToUser:[update objectForKey:TWITTER_STATUS_REPLY_UID]
    - inReplyToTweetID:[update objectForKey:TWITTER_STATUS_REPLY_ID]];
    + NSAttributedString *message = [self parseStatus:update
    + tweetID:[update objectForKey:TWITTER_STATUS_ID]
    + userID:inContact.UID
    + inReplyToUser:[update objectForKey:TWITTER_STATUS_REPLY_UID]
    + inReplyToTweetID:[update objectForKey:TWITTER_STATUS_REPLY_ID]];
    [profileArray addObject:[NSDictionary dictionaryWithObjectsAndKeys:message, KEY_VALUE, nil]];
    }
    @@ -1328,7 +1317,7 @@
    } else if (linkType == AITwitterLinkUserPage) {
    address = [NSString stringWithFormat:@"https://twitter.com/%@", userID];
    } else if (linkType == AITwitterLinkSearchHash) {
    - address = [NSString stringWithFormat:@"http://search.twitter.com/search?q=%%23%@", context];
    + address = [NSString stringWithFormat:@"http://twitter.com/search?q=%%23%@", context];
    } else if (linkType == AITwitterLinkReply) {
    address = [NSString stringWithFormat:@"twitterreply://%@@%@?action=reply&status=%@", self.internalObjectID, userID, statusID];
    } else if (linkType == AITwitterLinkRetweet) {
    @@ -1496,63 +1485,89 @@
    /*!
    * @brief Parse an attributed string into a linkified version.
    */
    -- (NSAttributedString *)linkifiedAttributedStringFromString:(NSAttributedString *)inString
    -{
    - NSAttributedString *attributedString;
    -
    - static NSCharacterSet *usernameCharacters = nil;
    - static NSCharacterSet *hashCharacters = nil;
    -
    - if (!usernameCharacters) {
    - usernameCharacters = [[NSCharacterSet characterSetWithCharactersInString:@"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_"] retain];
    - }
    -
    - if (!hashCharacters) {
    - NSMutableCharacterSet *disallowedCharacters = [[NSCharacterSet punctuationCharacterSet] mutableCopy];
    - [disallowedCharacters formUnionWithCharacterSet:[NSCharacterSet whitespaceCharacterSet]];
    - [disallowedCharacters removeCharactersInString:@"_"];
    +- (void)linkifyEntities:(NSArray *)entities inString:(NSMutableAttributedString **)inString forLinkType:(AITwitterLinkType)linkType {
    + [entities enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
    + NSString *text = @"";
    + NSString *userID = nil;
    + NSString *context = nil;
    + if (linkType == AITwitterLinkUserPage) {
    + userID = [obj objectForKey:@"screen_name"];
    + text = [NSString stringWithFormat:@"@%@", userID];
    + } else if (linkType == AITwitterLinkSearchHash) {
    + context = [obj objectForKey:@"text"];
    + text = [NSString stringWithFormat:@"#%@", context];
    + }
    - hashCharacters = [[disallowedCharacters invertedSet] retain];
    -
    - [disallowedCharacters release];
    - }
    -
    - attributedString = [AITwitterURLParser linkifiedStringFromAttributedString:inString
    - forPrefixCharacter:@"@"
    - forLinkType:AITwitterLinkUserPage
    - forAccount:self
    - validCharacterSet:usernameCharacters];
    -
    - attributedString = [AITwitterURLParser linkifiedStringFromAttributedString:attributedString
    - forPrefixCharacter:@"#"
    - forLinkType:AITwitterLinkSearchHash
    - forAccount:self
    - validCharacterSet:hashCharacters];
    -
    - return attributedString;
    + NSString *linkURL = [self addressForLinkType:linkType
    + userID:userID
    + statusID:nil
    + context:context];
    +
    + [*inString replaceOccurrencesOfString:text
    + withString:text
    + attributes:@{ NSLinkAttributeName : linkURL }
    + options:NSCaseInsensitiveSearch
    + range:NSMakeRange(0, [*inString length])];
    + }];
    }
    /*!
    * @brief Parses a Twitter message into an attributed string
    */
    -- (NSAttributedString *)parseMessage:(NSString *)inMessage
    - tweetID:(NSString *)tweetID
    - userID:(NSString *)userID
    - inReplyToUser:(NSString *)replyUserID
    - inReplyToTweetID:(NSString *)replyTweetID
    +- (NSAttributedString *)parseStatus:(NSDictionary *)inStatus
    + tweetID:(NSString *)tweetID
    + userID:(NSString *)userID
    + inReplyToUser:(NSString *)replyUserID
    + inReplyToTweetID:(NSString *)replyTweetID
    {
    - NSAttributedString *message;
    + NSMutableAttributedString *mutableMessage;
    + NSDictionary *retweet = [inStatus objectForKey:TWITTER_STATUS_RETWEET];
    +
    + if (retweet && [retweet isKindOfClass:[NSDictionary class]]) {
    + NSString *text = [[retweet objectForKey:TWITTER_STATUS_TEXT] stringByUnescapingFromXMLWithEntities:nil];
    + mutableMessage = [[NSMutableAttributedString alloc] initWithString:text];
    + [mutableMessage replaceCharactersInRange:NSMakeRange(0, 0)
    + withString:[NSString stringWithFormat:@"RT @%@: ",
    + [[retweet objectForKey:TWITTER_STATUS_USER] objectForKey:TWITTER_STATUS_UID]]];
    + } else {
    + NSString *text = [[inStatus objectForKey:TWITTER_STATUS_TEXT] stringByUnescapingFromXMLWithEntities:nil];
    + mutableMessage = [[NSMutableAttributedString alloc] initWithString:text];
    + }
    - message = [NSAttributedString stringWithString:[inMessage stringByUnescapingFromXMLWithEntities:nil]];
    + //Extract hashtags, users, and URLs
    + NSDictionary *entities = [inStatus objectForKey:@"entities"];
    + NSArray *hashtags = [entities objectForKey:@"hashtags"];
    + NSArray *urls = [entities objectForKey:@"urls"];
    + NSArray *users = [entities objectForKey:@"user_mentions"];
    + NSArray *media = [entities objectForKey:@"media"];
    +
    + [self linkifyEntities:users inString:&mutableMessage forLinkType:AITwitterLinkUserPage];
    + [self linkifyEntities:hashtags inString:&mutableMessage forLinkType:AITwitterLinkSearchHash];
    + [urls enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
    + NSString *linkURL = [obj objectForKey:@"url"];
    + NSString *expandedURL = [obj objectForKey:@"expanded_url"];
    + [mutableMessage replaceOccurrencesOfString:linkURL
    + withString:expandedURL
    + attributes:@{ NSLinkAttributeName : linkURL }
    + options:NSLiteralSearch
    + range:NSMakeRange(0, mutableMessage.length)];
    + }];
    + [media enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
    + NSString *linkURL = [obj objectForKey:@"url"];
    + NSString *displayURL = [obj objectForKey:@"display_url"];
    + [mutableMessage replaceOccurrencesOfString:linkURL
    + withString:displayURL
    + attributes:@{ NSLinkAttributeName : linkURL }
    + options:NSLiteralSearch
    + range:NSMakeRange(0, mutableMessage.length)];
    + }];
    - message = [self linkifiedAttributedStringFromString:message];
    + NSString *message = [mutableMessage string];
    BOOL replyTweet = (replyTweetID.length > 0);
    BOOL tweetLink = (tweetID.length && userID.length);
    if (replyTweet || tweetLink) {
    - NSMutableAttributedString *mutableMessage = [[message mutableCopy] autorelease];
    -
    NSUInteger startIndex = message.length;
    [mutableMessage appendString:@" (" withAttributes:nil];
    @@ -1566,9 +1581,9 @@
    statusID:replyTweetID
    context:nil];
    - if([inMessage hasPrefix:@"@"] &&
    - inMessage.length >= replyUserID.length + 1 &&
    - [replyUserID isCaseInsensitivelyEqualToString:[inMessage substringWithRange:NSMakeRange(1, replyUserID.length)]]) {
    + if([message hasPrefix:@"@"] &&
    + message.length >= replyUserID.length + 1 &&
    + [replyUserID isCaseInsensitivelyEqualToString:[message substringWithRange:NSMakeRange(1, replyUserID.length)]]) {
    // If the message has a "@" prefix, it's a proper in_reply_to_status_id if the usernames match. Set a link appropriately.
    [mutableMessage setAttributes:[NSDictionary dictionaryWithObjectsAndKeys:linkAddress, NSLinkAttributeName, nil]
    range:NSMakeRange(0, replyUserID.length + 1)];
    @@ -1616,7 +1631,7 @@
    linkAddress = [self addressForLinkType:AITwitterLinkQuote
    userID:userID
    statusID:tweetID
    - context:[inMessage stringByAddingPercentEscapesForAllCharacters]];
    + context:[message stringByAddingPercentEscapesForAllCharacters]];
    #define PILCROW_SIGN @"\u00B6"
    @@ -1648,7 +1663,7 @@
    linkAddress = [self addressForLinkType:AITwitterLinkDestroyStatus
    userID:userID
    statusID:tweetID
    - context:[inMessage stringByAddingPercentEscapesForAllCharacters]];
    + context:[message stringByAddingPercentEscapesForAllCharacters]];
    [mutableMessage appendAttributedString:[self attributedStringWithLinkLabel:@"\u232B"
    linkDestination:linkAddress
    @@ -1686,9 +1701,9 @@
    [NSNumber numberWithBool:YES], AIHiddenMessagePartAttributeName, nil]
    range:NSMakeRange(startIndex, mutableMessage.length - startIndex)];
    - return mutableMessage;
    + return [mutableMessage autorelease];
    } else {
    - return message;
    + return [[[NSAttributedString alloc] initWithString:message] autorelease];
    }
    }
    @@ -1703,9 +1718,9 @@
    message = [NSAttributedString stringWithString:[inMessage stringByUnescapingFromXMLWithEntities:nil]];
    - message = [self linkifiedAttributedStringFromString:message];
    -
    NSMutableAttributedString *mutableMessage = [[message mutableCopy] autorelease];
    + [self linkifyEntities:users inString:&mutableMessage forLinkType:AITwitterLinkUserPage];
    + [self linkifyEntities:hashtags inString:&mutableMessage forLinkType:AITwitterLinkSearchHash];
    NSUInteger startIndex = message.length;
    @@ -1801,26 +1816,22 @@
    [[AIContactObserverManager sharedManager] delayListObjectNotifications];
    for (NSDictionary *status in sortedQueuedUpdates) {
    - NSDictionary *retweet = [status objectForKey:TWITTER_STATUS_RETWEET];
    - NSString *text = [status objectForKey:TWITTER_STATUS_TEXT];
    -
    - if (retweet && [retweet isKindOfClass:[NSDictionary class]]) {
    - text = [NSString stringWithFormat:@"RT @%@: %@",
    - [[retweet objectForKey:TWITTER_STATUS_USER] objectForKey:TWITTER_STATUS_UID],
    - [retweet objectForKey:TWITTER_STATUS_TEXT]];
    - }
    + NSString *contactUID = [[status objectForKey:TWITTER_STATUS_USER] objectForKey:TWITTER_STATUS_UID];
    + NSAttributedString *message = [self parseStatus:status
    + tweetID:[status objectForKey:TWITTER_STATUS_ID]
    + userID:contactUID
    + inReplyToUser:[status objectForKey:TWITTER_STATUS_REPLY_UID]
    + inReplyToTweetID:[status objectForKey:TWITTER_STATUS_REPLY_ID]];
    NSDate *date = [status objectForKey:TWITTER_STATUS_CREATED];
    - NSString *contactUID = [[status objectForKey:TWITTER_STATUS_USER] objectForKey:TWITTER_STATUS_UID];
    -
    id fromObject = nil;
    if (![self.UID isCaseInsensitivelyEqualToString:contactUID]) {
    AIListContact *listContact = [self contactWithUID:contactUID];
    // Update the user's status message
    - [listContact setStatusMessage:[NSAttributedString stringWithString:[text stringByUnescapingFromXMLWithEntities:nil]]
    + [listContact setStatusMessage:message
    notify:NotifyNow];
    [self updateUserIcon:[[status objectForKey:TWITTER_STATUS_USER] objectForKey:TWITTER_INFO_ICON] forContact:listContact];
    @@ -1832,12 +1843,6 @@
    fromObject = (id)self;
    }
    - NSAttributedString *message = [self parseMessage:text
    - tweetID:[status objectForKey:TWITTER_STATUS_ID]
    - userID:contactUID
    - inReplyToUser:[status objectForKey:TWITTER_STATUS_REPLY_UID]
    - inReplyToTweetID:[status objectForKey:TWITTER_STATUS_REPLY_ID]];
    -
    AIContentMessage *contentMessage = [AIContentMessage messageInChat:timelineChat
    withSource:fromObject
    destination:self
    --- a/Plugins/Twitter Plugin/AITwitterURLParser.h Sat Mar 23 21:49:08 2013 -0400
    +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
    @@ -1,29 +0,0 @@
    -/*
    - * Adium is the legal property of its developers, whose names are listed in the copyright file included
    - * with this source distribution.
    - *
    - * 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.
    - *
    - * You should have received a copy of the GNU General Public License along with this program; if not,
    - * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
    - */
    -
    -#import "AITwitterAccount.h"
    -
    -@interface AITwitterURLParser : NSObject {
    -
    -}
    -
    -+(NSAttributedString *)linkifiedStringFromAttributedString:(NSAttributedString *)inString
    - forPrefixCharacter:(NSString *)prefixCharacter
    - forLinkType:(AITwitterLinkType)linkType
    - forAccount:(AITwitterAccount *)account
    - validCharacterSet:(NSCharacterSet *)validValues;
    -
    -@end
    --- a/Plugins/Twitter Plugin/AITwitterURLParser.m Sat Mar 23 21:49:08 2013 -0400
    +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
    @@ -1,88 +0,0 @@
    -/*
    - * Adium is the legal property of its developers, whose names are listed in the copyright file included
    - * with this source distribution.
    - *
    - * 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.
    - *
    - * You should have received a copy of the GNU General Public License along with this program; if not,
    - * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
    - */
    -
    -#import "AITwitterURLParser.h"
    -#import "AITwitterAccount.h"
    -#import <AIUtilities/AIAttributedStringAdditions.h>
    -#import <AIUtilities/AIStringAdditions.h>
    -
    -@implementation AITwitterURLParser
    -
    -+(NSAttributedString *)linkifiedStringFromAttributedString:(NSAttributedString *)inString
    - forPrefixCharacter:(NSString *)prefixCharacter
    - forLinkType:(AITwitterLinkType)linkType
    - forAccount:(AITwitterAccount *)account
    - validCharacterSet:(NSCharacterSet *)validValues
    -{
    - NSMutableAttributedString *newString = [inString mutableCopy];
    -
    - NSScanner *scanner = [NSScanner scannerWithString:[inString string]];
    -
    - [scanner setCharactersToBeSkipped:nil];
    -
    - [newString beginEditing];
    -
    - while(!scanner.isAtEnd) {
    - [scanner scanUpToString:prefixCharacter intoString:NULL];
    -
    - if(scanner.isAtEnd) {
    - break;
    - }
    -
    - NSUInteger startLocation = scanner.scanLocation;
    - NSString *linkText = nil;
    -
    - // Advance to the start of the string we want.
    - // Check to make sure we aren't exceeding the string bounds.
    - if(startLocation + 1 < scanner.string.length) {
    - scanner.scanLocation++;
    - } else {
    - break;
    - }
    -
    - // Grab any valid characters we can.
    - BOOL scannedCharacters = [scanner scanCharactersFromSet:validValues intoString:&linkText];
    -
    - if(scannedCharacters) {
    - if((scanner.scanLocation - linkText.length) == prefixCharacter.length ||
    - [[NSCharacterSet whitespaceAndNewlineCharacterSet] characterIsMember:[scanner.string characterAtIndex:(scanner.scanLocation - linkText.length - prefixCharacter.length - 1)]]) {
    -
    - NSString *linkURL = nil;
    - if(linkType == AITwitterLinkUserPage) {
    - linkURL = [account addressForLinkType:linkType userID:[linkText stringByEncodingURLEscapes] statusID:nil context:nil];
    - } else if (linkType == AITwitterLinkSearchHash) {
    - linkURL = [account addressForLinkType:linkType userID:nil statusID:nil context:[linkText stringByEncodingURLEscapes]];
    - } else if (linkType == AITwitterLinkGroup) {
    - linkURL = [account addressForLinkType:linkType userID:nil statusID:nil context:[linkText stringByEncodingURLEscapes]];
    - }
    -
    - if(linkURL) {
    - [newString addAttribute:NSLinkAttributeName
    - value:linkURL
    - range:NSMakeRange(startLocation + 1, linkText.length)];
    - }
    - }
    - } else {
    - scanner.scanLocation++;
    - }
    - }
    -
    - [newString endEditing];
    -
    - return [newString autorelease];
    -}
    -
    -@end