a little boilerplate for creating objective-c classes from json data

create_objc_from_json.rb

require 'json'
require 'open-uri'

def camel_case(string)
  return string.split('_').map{|e| e.capitalize}.join
end
def camel_case_lower(s)  s.split('_').inject([]){ |buffer,e| buffer.push(buffer.empty? ? e : e.capitalize) }.join
end

json = JSON.load(open(ARGV[0]))
#json["results"][0]["availability"].each do |k,v|
json["results"][0].each do |k,v|
  case v.class.to_s
  when "TrueClass", "FalseClass"
    bool_name = k.gsub(/^is/, '')
    puts "@property (nonatomic, assign, getter = is#{camel_case bool_name}) BOOL #{camel_case_lower k};"
  when "String"
    puts "@property (nonatomic, strong) NSString *#{camel_case_lower k};"
  when "Array"
    puts "@property (nonatomic, strong) NSArray *#{camel_case_lower k};"
  when "Fixnum"
    puts "@property (nonatomic) NSInteger #{camel_case_lower k};"
  when "NilClass"
    puts "@property (nonatomic, strong) NSObject *#{camel_case_lower k};"
  when "Hash"
    puts "@property (nonatomic, strong) #{camel_case k} *#{camel_case_lower k};"
  else
    puts "FIX ME " + v.class.to_s + " " + k
  end
end
puts "- (id)initWithDictionary:(NSDictionary *)dictionary {"
puts "if (self = [super init]) {"
json["results"][0].each do |k,v|
  case v.class.to_s
  when "TrueClass", "FalseClass"
    puts %Q{self.#{camel_case_lower k} = [dictionary booleanForKey:@"#{k}" defaultValue:NO];}
  when "String", "NilClass"
    puts %Q{self.#{camel_case_lower k} = [dictionary stringForKey:@"#{k}"];}
  when "Array"
    puts %Q{self.#{camel_case_lower k} = [dictionary stringsForKey:@"#{k}"];}
  when "Fixnum"
    puts %Q{self.#{camel_case_lower k} = [dictionary integerForKey:@"#{k}" defaultValue:-1];}
  when "Hash"
    puts %Q{self.#{camel_case_lower k} = [dictionary mappedObjectForKey:@"#{k}" type:[#{camel_case k} class]];}
  else
    puts "FIX ME " + v.class.to_s + " " + k
  end
end
puts "}
    return self;
    "
puts "}"