Pickchar parser parses options. Output is not converted at the moment

MacPass/MPPickcharsParser.m

@@ -0,0 +1,134 @@
+//
+//  MPPickcharParser.m
+//  MacPass
+//
+//  Created by Michael Starke on 29.11.17.
+//  Copyright © 2017 HicknHack Software GmbH. All rights reserved.
+//
+
+#import "MPPickcharsParser.h"
+#import <KeePassKit/KeePassKit.h>
+
+@interface MPPickcharsParser ()
+
+@property NSUInteger pickCount; // count to pick
+@property NSUInteger checkboxOffset;
+@property BOOL convertToDownArrows;
+@property BOOL hideCharacters;
+@property (copy) NSString *checkboxFormat;
+
+@end
+
+@implementation MPPickcharsParser
+
+- (instancetype)init {
+  self = [self initWithOptions:nil];
+  return self;
+}
+
+- (instancetype)initWithOptions:(NSString *)options {
+  self = [super init];
+  if(self) {
+    _pickCount = 0;
+    _checkboxOffset = 0;
+    _convertToDownArrows = NO;
+    _hideCharacters = YES;
+    [self _parseOptions:options];
+  }
+  return self;
+}
+
+- (NSString *)processPickedString:(NSString *)string {
+  return string;
+}
+
+/*
+ {PICKCHAR:Field:Options}
+
+ Options allow to convert picked character to be typed into drop-down-boxes.
+ E.g. select digits or letters
+ Options:
+ 
+ ID=id (id for multiple pickchars in a field will not get processed
+ Conv=D If set, convert values to down arrow presses
+ Conv-Offset= Offset for conversion of characters, will be added to all arrow presses
+ 
+ Conv-Fmt= Format of the check-box
+ 
+  0 - Numbers 0129456789
+  1 - NUmber 1234567890
+  a - lowercase characters
+  A - uppercase characters
+  ? - skip combobox item
+ 
+ -> combine for layout e.g. 0a or 0aA 0?aA
+ */
+- (void)_parseOptions:(NSString *)options {
+  for(NSString *option in [options componentsSeparatedByString:kKPKPlaceholderPickCharsOptionDelemiter]) {
+    NSArray <NSString *>*keyValuePair = [option componentsSeparatedByString:@"="];
+    if(![self _parseOptionKeyValuePair:keyValuePair]) {
+      NSLog(@"Invalid Option: %@", option);
+      continue;
+    };
+  }
+}
+
+- (BOOL)_parseOptionKeyValuePair:(NSArray <NSString *> *)optionPair {
+  if(optionPair.count != 2) {
+    return NO;
+  }
+  NSString *key = [optionPair.firstObject stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
+  NSString *option = [optionPair.lastObject stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
+  
+  if(NSOrderedSame == [key compare:kKPKPlaceholderPickCharsOptionCount options:NSCaseInsensitiveSearch]
+     || NSOrderedSame == [key compare:kKPKPlaceholderPickCharsOptionCountShort options:NSCaseInsensitiveSearch]) {
+    NSScanner *scanner = [[NSScanner alloc] initWithString:option];
+    NSInteger count;
+    if([scanner scanInteger:&count]) {
+      if(count != INT_MIN && count != INT_MAX) {
+        self.pickCount = MAX(0,count);
+        return YES;
+      }
+    }
+    return NO;
+  }
+ /*
+  FOUNDATION_EXPORT NSString *const kKPKPlaceholderPickCharsOptionConvertFormat;
+  */
+  if(NSOrderedSame == [key compare:kKPKPlaceholderPickCharsOptionHide options:NSCaseInsensitiveSearch]) {
+    if(NSOrderedSame == [option compare:@"false" options:NSCaseInsensitiveSearch]) {
+      self.hideCharacters = NO;
+      return YES;
+    }
+    if(NSOrderedSame == [option compare:@"true" options:NSCaseInsensitiveSearch]) {
+      self.hideCharacters = YES;
+      return YES;
+    }
+    return NO;
+  }
+  if(NSOrderedSame == [key compare:kKPKPlaceholderPickCharsOptionConvert options:NSCaseInsensitiveSearch]) {
+    if(NSOrderedSame == [option compare:@"D" options:NSCaseInsensitiveSearch]) {
+      self.convertToDownArrows = YES;
+      return YES;
+    }
+    return NO;
+  }
+  if(NSOrderedSame == [key compare:kKPKPlaceholderPickCharsOptionConvertOffset options:NSCaseInsensitiveSearch]) {
+    NSScanner *scanner = [[NSScanner alloc] initWithString:option];
+    NSInteger offset;
+    if([scanner scanInteger:&offset]) {
+      if(offset != INT_MIN && offset != INT_MAX) {
+        self.checkboxOffset = MAX(0,offset);
+        return YES;
+      }
+    }
+    return NO;
+  }
+  if(NSOrderedSame == [key compare:kKPKPlaceholderPickCharsOptionConvertFormat options:NSCaseInsensitiveSearch]) {
+    self.checkboxFormat = option;
+    return YES;
+  }
+  return NO;
+}
+
+@end