- Update

Extensions/XEP-0147/XMPPURI.h

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+//
+//  XMPPURI.h
+//  XMPPFramework
+//
+//  Created by Christopher Ballinger on 5/15/15.
+//  Copyright (c) 2015 Chris Ballinger. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import "XMPPJID.h"
+
+/** 
+ *  For parsing and creating XMPP URIs RFC5122/XEP-0147
+ *  e.g. xmpp:username@domain.com?subscribe 
+ *  http://www.xmpp.org/extensions/xep-0147.html
+ */
+@interface XMPPURI : NSObject
+
+/**
+ * User JID. e.g. romeo@montague.net
+ * Example: xmpp:romeo@montague.net
+ */
+@property (nonatomic, strong, readonly) XMPPJID *jid;
+
+/**
+ * Account JID. (Optional)
+ * Used to specify an account with which to perform an action.
+ * For example 'guest@example.com' would be the authority portion of
+ *    xmpp://guest@example.com/support@example.com?message
+ * so the application would show a dialog with an outgoing message
+ * to support@example.com from the user's account guest@example.com.
+ */
+@property (nonatomic, strong, readonly) XMPPJID *accountJID;
+
+/** 
+ * XMPP query action. e.g. subscribe
+ * For example, the query action below would be 'subscribe'
+ *    xmpp:romeo@montague.net?subscribe
+ * For full list: http://xmpp.org/registrar/querytypes.html
+ */
+@property (nonatomic, strong, readonly) NSString *queryAction;
+
+/**
+ * XMPP query parameters. e.g. subject=Test
+ *
+ * For example the query parameters for
+ *     xmpp:romeo@montague.net?message;subject=Test%20Message;body=Here%27s%20a%20test%20message
+ * would be
+ * {"subject": "Test Message",
+ *  "body": "Here's a test message"}
+ */
+@property (nonatomic, strong, readonly) NSDictionary *queryParameters;
+
+/** 
+ * Generates URI string from jid, queryAction, and queryParameters
+ * e.g. xmpp:romeo@montague.net?subscribe 
+ */
+- (NSString*) uriString;
+
+// Parsing XMPP URIs
+- (instancetype) initWithURL:(NSURL*)url;
+- (instancetype) initWithURIString:(NSString*)uriString;
+
+// Creating XMPP URIs
+- (instancetype) initWithJID:(XMPPJID*)jid
+                 queryAction:(NSString*)queryAction
+             queryParameters:(NSDictionary*)queryParameters;
+
+@end

Extensions/XEP-0147/XMPPURI.m

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+//
+//  XMPPURI.m
+//  XMPPFramework
+//
+//  Created by Christopher Ballinger on 5/15/15.
+//  Copyright (c) 2015 Chris Ballinger. All rights reserved.
+//
+
+#import "XMPPURI.h"
+
+@implementation XMPPURI
+
+- (instancetype) initWithURIString:(NSString *)uriString {
+    if (self = [super init]) {
+        [self parseURIString:uriString];
+    }
+    return self;
+}
+
+- (instancetype) initWithURL:(NSURL *)url {
+    if (self = [self initWithURIString:url.absoluteString]) {
+    }
+    return self;
+}
+
+- (instancetype) initWithJID:(XMPPJID*)jid
+                 queryAction:(NSString*)queryAction
+             queryParameters:(NSDictionary*)queryParameters {
+    if (self = [super init]) {
+        _jid = [jid copy];
+        _queryAction = [queryAction copy];
+        _queryParameters = [queryParameters copy];
+    }
+    return self;
+}
+
+- (NSString*) uriString {
+    NSMutableString *uriString = [NSMutableString stringWithFormat:@"xmpp:%@", self.jid.bare];
+    if (self.queryAction) {
+        [uriString appendFormat:@"?%@", self.queryAction];
+    }
+    NSMutableCharacterSet *allowedCharacterSet = NSCharacterSet.URLQueryAllowedCharacterSet.mutableCopy;
+    [allowedCharacterSet removeCharactersInString:@"'"]; // what other characters should be removed?
+    [self.queryParameters enumerateKeysAndObjectsUsingBlock:^(NSString *key, NSString *obj, BOOL *stop) {
+        NSString *value = [obj stringByAddingPercentEncodingWithAllowedCharacters:allowedCharacterSet];
+        [uriString appendFormat:@";%@=%@", key, value];
+    }];
+    return uriString;
+}
+
+- (void) parseURIString:(NSString*)uriString {
+    NSString *authority = nil;
+    // Parse authority component
+    if ([uriString containsString:@"://"]) {
+        NSRange fullRange = NSMakeRange(0, uriString.length);
+        NSRange startRange = [uriString rangeOfString:@"://"];
+        NSUInteger trailingLocation = startRange.location + startRange.length;
+        NSRange trailingRange = NSMakeRange(trailingLocation, uriString.length - trailingLocation);
+        NSRange endRange = [uriString rangeOfString:@"/" options:0 range:trailingRange];
+        NSUInteger authorityLocation = startRange.location + startRange.length;
+        NSRange authorityRange = NSMakeRange(authorityLocation, endRange.location - authorityLocation);
+        authority = [uriString substringWithRange:authorityRange];
+        NSString *stringToRemove = [NSString stringWithFormat:@"://%@/", authority];
+        uriString = [uriString stringByReplacingOccurrencesOfString:stringToRemove withString:@":" options:0 range:fullRange];
+    }
+    if (authority) {
+        _accountJID = [XMPPJID jidWithString:authority];
+    }
+    
+    NSArray *uriComponents = [uriString componentsSeparatedByString:@":"];
+    NSString *scheme = nil;
+    NSString *jidString = nil;
+    
+    if (uriComponents.count >= 2) {
+        scheme = uriComponents[0];
+        NSString *path = uriComponents[1];
+        if ([path containsString:@"?"]) {
+            NSArray *queryComponents = [path componentsSeparatedByString:@"?"];
+            jidString = queryComponents[0];
+            NSString *query = queryComponents[1];
+            NSArray *queryKeys = [query componentsSeparatedByString:@";"];
+            
+            NSMutableDictionary *queryParameters = [NSMutableDictionary dictionaryWithCapacity:queryKeys.count];
+            [queryKeys enumerateObjectsUsingBlock:^(NSString *queryItem, NSUInteger idx, BOOL *stop) {
+                if (idx == 0) {
+                    _queryAction = queryItem;
+                } else {
+                    NSArray *keyValue = [queryItem componentsSeparatedByString:@"="];
+                    if (keyValue.count == 2) {
+                        NSString *key = keyValue[0];
+                        NSString *value = [keyValue[1] stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
+                        if (key && value) {
+                            queryParameters[key] = value;
+                        }
+                    }
+                }
+            }];
+            _queryParameters = queryParameters;
+        } else {
+            jidString = path;
+        }
+    }
+    if (jidString) {
+        _jid = [XMPPJID jidWithString:jidString];
+    }
+}
+
+@end