Fix non-contact lookup for non-US users.

// FREEBIE

src/Contacts/ContactsUpdater.h

@@ -14,11 +14,25 @@ NS_ASSUME_NONNULL_BEGIN
 
 - (nullable SignalRecipient *)synchronousLookup:(NSString *)identifier error:(NSError **)error;
 
-// This asynchronously updates the SignalRecipient for a given contactId.
+// This asynchronously tries to verify whether or not a contact id
+// corresponds to a service account.
+//
+// The failure callback is invoked if the lookup fails _or_ if the
+// contact id doesn't correspond to an account.
 - (void)lookupIdentifier:(NSString *)identifier
                  success:(void (^)(SignalRecipient *recipient))success
                  failure:(void (^)(NSError *error))failure;
 
+// This asynchronously tries to verify whether or not group of possible
+// contact ids correspond to service accounts.
+//
+// The failure callback is only invoked if the lookup fails.  Otherwise,
+// the success callback is invoked with the (possibly empty) set of contacts
+// that were found.
+- (void)lookupIdentifiers:(NSArray<NSString *> *)identifiers
+                  success:(void (^)(NSArray<SignalRecipient *> *recipients))success
+                  failure:(void (^)(NSError *error))failure;
+
 - (void)updateSignalContactIntersectionWithABContacts:(NSArray<Contact *> *)abContacts
                                               success:(void (^)())success
                                               failure:(void (^)(NSError *error))failure;

src/Contacts/ContactsUpdater.m

@@ -60,7 +60,7 @@ NS_ASSUME_NONNULL_BEGIN
         failure(OWSErrorWithCodeDescription(OWSErrorCodeInvalidMethodParameters, @"Cannot lookup nil identifier"));
         return;
     }
-
+    
     [self contactIntersectionWithSet:[NSSet setWithObject:identifier]
                              success:^(NSSet<NSString *> *_Nonnull matchedIds) {
                                  if (matchedIds.count == 1) {
@@ -72,6 +72,31 @@ NS_ASSUME_NONNULL_BEGIN
                              failure:failure];
 }
 
+- (void)lookupIdentifiers:(NSArray<NSString *> *)identifiers
+                 success:(void (^)(NSArray<SignalRecipient *> *recipients))success
+                 failure:(void (^)(NSError *error))failure
+{
+    if (identifiers.count < 1) {
+        OWSAssert(NO);
+        failure(OWSErrorWithCodeDescription(OWSErrorCodeInvalidMethodParameters, @"Cannot lookup zero identifiers"));
+        return;
+    }
+    
+    [self contactIntersectionWithSet:[NSSet setWithArray:identifiers]
+                             success:^(NSSet<NSString *> *_Nonnull matchedIds) {
+                                 if (matchedIds.count == 1) {
+                                     NSMutableArray<SignalRecipient *> *recipients = [NSMutableArray new];
+                                     for (NSString *identifier in matchedIds) {
+                                         [recipients addObject:[SignalRecipient recipientWithTextSecureIdentifier:identifier]];
+                                     }
+                                     success(recipients);
+                                 } else {
+                                     failure(OWSErrorMakeNoSuchSignalRecipientError());
+                                 }
+                             }
+                             failure:failure];
+}
+
 - (void)updateSignalContactIntersectionWithABContacts:(NSArray<Contact *> *)abContacts
                                               success:(void (^)())success
                                               failure:(void (^)(NSError *error))failure {

src/Contacts/PhoneNumber.h

@@ -1,3 +1,7 @@
+//
+//  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
+//
+
 #import <Foundation/Foundation.h>
 #import <libPhoneNumber-iOS/NBPhoneNumberUtil.h>
 
@@ -24,6 +28,14 @@
 + (PhoneNumber *)tryParsePhoneNumberFromUserSpecifiedText:(NSString *)text;
 + (PhoneNumber *)tryParsePhoneNumberFromE164:(NSString *)text;
 
+// This will try to parse the input text as a phone number using
+// the default region and the country code for this client's phone
+// number.
+//
+// Order matters; better results will appear first.
++ (NSArray *)tryParsePhoneNumbersFromsUserSpecifiedText:(NSString *)text
+                                      clientPhoneNumber:(NSString *)clientPhoneNumber;
+
 + (NSString *)removeFormattingCharacters:(NSString *)inputString;
 + (NSString *)bestEffortFormatPartialUserSpecifiedTextToLookLikeAPhoneNumber:(NSString *)input;
 + (NSString *)bestEffortFormatPartialUserSpecifiedTextToLookLikeAPhoneNumber:(NSString *)input

src/Contacts/PhoneNumber.m

@@ -1,3 +1,7 @@
+//
+//  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
+//
+
 #import "NBAsYouTypeFormatter.h"
 #import "NBPhoneNumber.h"
 #import "PhoneNumber.h"
@@ -115,6 +119,60 @@ static NSString *const RPDefaultsKeyPhoneNumberCanonical = @"RPDefaultsKeyPhoneN
     return [self phoneNumberFromUserSpecifiedText:sanitizedString];
 }
 
++ (NSArray *)tryParsePhoneNumbersFromsUserSpecifiedText:(NSString *)text
+                                      clientPhoneNumber:(NSString *)clientPhoneNumber {
+    assert(text != nil);
+    
+    text = [text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
+    if ([text isEqualToString:@""]) {
+        return nil;
+    }
+    
+    NSString *sanitizedString = [self removeFormattingCharacters:text];
+    assert(sanitizedString != nil);
+    
+    NSMutableArray *result = [NSMutableArray new];
+    NSMutableSet *phoneNumberSet = [NSMutableSet new];
+    void (^tryParsingWithCountryCode)(NSString *, NSString *) = ^(NSString *text,
+                                                      NSString *countryCode) {
+        PhoneNumber *phoneNumber = [PhoneNumber phoneNumberFromText:text
+                                                          andRegion:countryCode];
+        if (phoneNumber &&
+            ![phoneNumberSet containsObject:[phoneNumber toE164]]) {
+            [result addObject:phoneNumber];
+            [phoneNumberSet addObject:[phoneNumber toE164]];
+        }
+    };
+    
+    // Order matters; better results should appear first so
+    // prefer matches using this client's phone number.
+    if (clientPhoneNumber.length > 0) {
+        NSNumber *callingCodeForLocalNumber = [[PhoneNumber phoneNumberFromE164:clientPhoneNumber] getCountryCode];
+        if (callingCodeForLocalNumber != nil) {
+            tryParsingWithCountryCode([NSString stringWithFormat:@"+%@%@",
+                                       callingCodeForLocalNumber,
+                                       sanitizedString],
+                                      [self defaultRegionCode]);
+            // It's gratuitous to try all country codes associated with a given
+            // calling code, but it can't hurt and this isn't a performance
+            // hotspot.
+            NSArray *possibleLocalCountryCodes = [PhoneNumberUtil countryCodesFromCallingCode:[NSString stringWithFormat:@"+%@",
+                                                                                               callingCodeForLocalNumber]];
+            for (NSString *countryCode in possibleLocalCountryCodes) {
+                tryParsingWithCountryCode([NSString stringWithFormat:@"+%@%@",
+                                           callingCodeForLocalNumber,
+                                           sanitizedString],
+                                          countryCode);
+            }
+        }
+    }
+    
+    // Also try matches using the phone's default region.
+    tryParsingWithCountryCode(sanitizedString, [self defaultRegionCode]);
+    
+    return result;
+}
+
 + (NSString *)removeFormattingCharacters:(NSString *)inputString {
     char outputString[inputString.length + 1];
 

src/Contacts/PhoneNumberUtil.h

@@ -10,9 +10,10 @@
 
 @property (nonatomic, retain) NBPhoneNumberUtil *nbPhoneNumberUtil;
 
-+ (NSString *)callingCodeFromCountryCode:(NSString *)code;
-+ (NSString *)countryNameFromCountryCode:(NSString *)code;
++ (NSString *)callingCodeFromCountryCode:(NSString *)countryCode;
++ (NSString *)countryNameFromCountryCode:(NSString *)countryCode;
 + (NSArray *)countryCodesForSearchTerm:(NSString *)searchTerm;
++ (NSArray *)countryCodesFromCallingCode:(NSString *)callingCode;
 
 + (NSUInteger)translateCursorPosition:(NSUInteger)offset
                                  from:(NSString *)source

src/Contacts/PhoneNumberUtil.m

@@ -30,8 +30,8 @@
 }
 
 // country code -> country name
-+ (NSString *)countryNameFromCountryCode:(NSString *)code {
-    NSDictionary *countryCodeComponent = @{NSLocaleCountryCode : code};
++ (NSString *)countryNameFromCountryCode:(NSString *)countryCode {
+    NSDictionary *countryCodeComponent = @{NSLocaleCountryCode : countryCode};
     NSString *identifier               = [NSLocale localeIdentifierFromComponents:countryCodeComponent];
     NSString *country                  = [NSLocale.currentLocale displayNameForKey:NSLocaleIdentifier value:identifier];
     return country;
@@ -86,6 +86,17 @@
     return callingCode;
 }
 
++ (NSArray *)countryCodesFromCallingCode:(NSString *)callingCode {
+    NSMutableArray *countryCodes = [NSMutableArray new];
+    for (NSString *countryCode in NSLocale.ISOCountryCodes) {
+        NSString *callingCodeForCountryCode = [self callingCodeFromCountryCode:countryCode];
+        if ([callingCode isEqualToString:callingCodeForCountryCode]) {
+            [countryCodes addObject:countryCode];
+        }
+    }
+    return countryCodes;
+}
+
 // search term -> country codes
 + (NSArray *)countryCodesForSearchTerm:(NSString *)searchTerm {
     searchTerm = [searchTerm stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];