text: // Copyright (c) 2006 Simon Fell
  //
  // Permission is hereby granted, free of charge, to any person obtaining a 
  // copy of this software and associated documentation files (the "Software"), 
  // to deal in the Software without restriction, including without limitation
  // the rights to use, copy, modify, merge, publish, distribute, sublicense, 
  // and/or sell copies of the Software, and to permit persons to whom the 
  // Software is furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included 
  // in all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 
  // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
  // THE SOFTWARE.
  //
  
  #import "FieldImportance.h"
  
  @implementation ZKDescribeField (FieldImportance)
  
  -(BOOL)isUserReference:(BOOL)userOnly {
      if (![self.type isEqualTo:@"reference"]) return NO;
      NSArray *references = self.referenceTo;
      if (!userOnly && (references.count == 1)) return NO;
      if (userOnly && (references.count != 1)) return NO;
      return [references containsObject:@"User"];
  }
  
  -(BOOL)isReferenceToOnlyUser {
      return [self isUserReference:YES];
  }
  
  -(BOOL)isPolyReferenceIncludingUser {
      return [self isUserReference:NO];
  }
  
  // todo, make magic numbers go away
  -(int)importance {
      if ([self.name isEqualToString:@"Id"])
          return 1;
      if (self.nameField)
          return 2;
      if (self.externalId)
          return 3;
      if ([self isPolyReferenceIncludingUser])
          return 5;
      if ([self isReferenceToOnlyUser])
          return 6;
      if ([self.name isEqualToString:@"CreatedDate"])
          return 7;
      if ([self.name isEqualToString:@"LastModifiedDate"])
          return 8;
      if ([self.name isEqualToString:@"SystemModstamp"])
          return 9;
      return 4;
  }
  
  -(BOOL)shouldDisplayInMode:(SObjectBoxViewMode)viewMode {
      if (viewMode == vmTitleOnly) 
          return [self importance] <= 2;
      if (viewMode == vmImportantFields)
          return [self importance] <= 3 || !self.custom;
      return true;
  }
  
  @end
  