1package main
  2
  3import (
  4	"errors"
  5	"fmt"
  6	"net/http"
  7	"time"
  8
  9	"github.com/gin-gonic/gin"
 10)
 11
 12func validateDate(month, day int) error {
 13	if month < 1 || month > 12 {
 14		return errors.New("invalid month: must be between 1 and 12")
 15	}
 16
 17	if day < 1 || day > 31 {
 18		return errors.New("invalid day: must be between 1 and 31")
 19	}
 20
 21	// Construct a date and use time package to validate
 22	dateStr := fmt.Sprintf("2023-%02d-%02d", month, day)
 23	_, err := time.Parse("2006-01-02", dateStr)
 24	if err != nil {
 25		return errors.New("invalid day for the given month")
 26	}
 27
 28	return nil
 29}
 30
 31func addOccurrence(c *gin.Context) {
 32	var input Occurrence
 33	if err := c.ShouldBindJSON(&input); err != nil {
 34		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
 35		return
 36	}
 37
 38	var isDateValid = false
 39	// Validate date
 40	if input.Day != 0 || input.Month != 0 {
 41		if err := validateDate(input.Month, input.Day); err != nil {
 42			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
 43			return
 44		}
 45		isDateValid = true
 46	}
 47
 48	var occurrence Occurrence
 49	if input.ID != 0 {
 50		if err := db.First(&occurrence, input.ID).Error; err != nil {
 51			c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
 52			return
 53		}
 54
 55		// Update existing record with new values
 56		if isDateValid {
 57			occurrence.Month = input.Month
 58			occurrence.Day = input.Day
 59		}
 60		if input.Name != "" {
 61			occurrence.Name = input.Name
 62		}
 63		if input.Description != "" {
 64			occurrence.Description = input.Description
 65		}
 66		occurrence.Notify = input.Notify
 67		occurrence.Notified = input.Notified
 68		db.Save(&occurrence)
 69		c.JSON(http.StatusOK, occurrence)
 70		return
 71	}
 72
 73	// Create a new record if no existing record is found
 74	if !isDateValid {
 75		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid date"})
 76		return
 77	}
 78
 79	occurrence = input
 80	occurrence.Notified = false
 81	db.Create(&occurrence)
 82	c.JSON(http.StatusOK, occurrence)
 83}
 84
 85func getOccurrences(c *gin.Context) {
 86	var occurrences []Occurrence
 87	db.Find(&occurrences)
 88	c.JSON(http.StatusOK, occurrences)
 89}
 90
 91func deleteOccurrence(c *gin.Context) {
 92	id := c.Param("id")
 93	var occurrence Occurrence
 94
 95	if err := db.First(&occurrence, id).Error; err != nil {
 96		c.JSON(http.StatusNotFound, gin.H{"error": "Occurrence not found"})
 97		return
 98	}
 99
100	db.Delete(&occurrence)
101	c.JSON(http.StatusOK, gin.H{"message": "Occurrence deleted"})
102}