Moving to Code from a Design Model

Application coded with PHP

• Design assumes object-oriented (OO) language used for implementation
• PHP is not a fully object-oriented language, but:
  • Has classes with member variables and member functions, similar in approach to C++
  • Allows inheritance, some encapsulation
• Translation to PHP from OO design not a major problem

Code classes follow from Design Model

• SurveyMaker- interface between user and application
  • member variables:
    • surveyOwner- user name of user
    • numSurveys: integer representing number of Surveys surveyOwner "owns"
    • filelist: an array of filenames of size = numSurveys
  • member functions:
    • showSurveyMenu()- choice of
    • newSurvey()- creates a new survey, as PHP doesn't have constructor methods
    • modifySurvey()- opens an existing survey for modification
    • makeQuestion()- make a new survey question
    • modifyQuestion()- modify an existing survey function.
    • endSurvey()- quit making survey
• Survey- a container for multiple objects of the class Question
  • member variable:
    • numQuestions- total number of questions in survey
  • member functions
    • getNumQuestions(), setNumQuestions()- the usual functions for getting and setting member variables
    • getQuestionTypes()- gets current list of Question Types and associated parameters from disk
    • newQuestion()- adds a new question to the survey
    • modifyQuestion()- modifies a question currently in the survey
    • refresh()- redraws survey with updated questions shown
    • saveSurvey()- Called when data must be saved to disk
    • exitSurvey()- closes survey
• Question-
  • member variables:
    • qtext- String of question text
    • qtype- instance of QuestionType class, encapsulates QuestionType data
  • member functions- the usual functions for getting and setting member variables
  • getQuestionType(), setQuestionType()
  • getQuestionText(), setQuestionText()
• QuestionType
  • member variables:
    • questionCategory
    • numChoices- number of choices a user pricks from
    • numResponses- maximum number of responses a user can make to the question
    • choice[numChoices]- vector of labels for each numChoices
  • member functions:
    • getCategory()
    • setCategory()
    • getNumChoice()
    • getNumResponses()