oef/orm/answer.go

package orm

import (
	"net/http"

	"git.andreafazzi.eu/andrea/oef/renderer"
	"github.com/jinzhu/gorm"
)

type Answer struct {
	gorm.Model

	Text    string
	Correct bool

	Question   *Question
	QuestionID uint `schema:"question_id"`

	AllQuestions []*Question     `gorm:"-"`
	Selected     map[uint]string `gorm:"-"`
}

func (a *Answer) GetID() uint { return a.ID }

func (a *Answer) String() string {
	return a.Text
}

func (a *Answer) Create(args map[string]string, r *http.Request) (interface{}, error) {
	if r.Method == "GET" {
		answer := new(Answer)
		if err := DB().Find(&answer.AllQuestions).Error; err != nil {
			return nil, err
		}

		return answer, nil
	} else {
		answer := new(Answer)
		err := renderer.Decode(answer, r)
		if err != nil {
			return nil, err
		}
		answer, err = CreateAnswer(answer)
		if err != nil {
			return nil, err
		}
		return answer, nil
	}
}

func (a *Answer) Read(args map[string]string, r *http.Request) (interface{}, error) {
	var answer Answer

	id := args["id"]

	if err := DB().Preload("Question").First(&answer, id).Error; err != nil {
		return nil, err
	}

	return &answer, nil
}

func (a *Answer) ReadAll(args map[string]string, r *http.Request) (interface{}, error) {
	var answers []*Answer
	if err := DB().Order("created_at").Find(&answers).Error; err != nil {
		return nil, err
	}
	return answers, nil
}

func (a *Answer) Update(args map[string]string, r *http.Request) (interface{}, error) {
	if r.Method == "GET" {
		result, err := a.Read(args, r)
		if err != nil {
			return nil, err
		}

		answer := result.(*Answer)

		if err := DB().Find(&answer.AllQuestions).Error; err != nil {
			return nil, err
		}

		answer.Selected = make(map[uint]string)
		answer.Selected[answer.QuestionID] = "selected"

		return answer, nil
	} else {
		answer, err := a.Read(args, nil)
		if err != nil {
			return nil, err
		}
		err = renderer.Decode(answer, r)
		if err != nil {
			return nil, err
		}
		_, err = SaveAnswer(answer)
		if err != nil {
			return nil, err
		}
		answer, err = a.Read(args, nil)
		if err != nil {
			return nil, err
		}
		return answer.(*Answer), nil
	}
}

func (a *Answer) Delete(args map[string]string, r *http.Request) (interface{}, error) {
	return nil, nil
}

func CreateAnswer(answer *Answer) (*Answer, error) {
	if err := DB().Create(answer).Error; err != nil {
		return nil, err
	}
	return answer, nil
}

func SaveAnswer(answer interface{}) (interface{}, error) {
	if err := DB().Omit("Answers").Save(answer).Error; err != nil {
		return nil, err
	}
	return answer, nil
}