1package main
 2
 3import (
 4	"embed"
 5	"fmt"
 6	"html/template"
 7	"log"
 8	"net/http"
 9	"time"
10)
11
12func calcYear(currentYear, year uint) uint {
13	return currentYear - year
14}
15
16func padZero(i uint) string {
17	return fmt.Sprintf("%02d", i)
18}
19
20var (
21	//go:embed templates/index.html
22	templates     embed.FS
23	indexTemplate *template.Template
24	funcMap       = template.FuncMap{
25		"padZero":  padZero,
26		"calcYear": calcYear,
27	}
28)
29
30func ParseTemplates() {
31	var err error
32	indexTemplate, err = template.New("index.html").Funcs(funcMap).ParseFS(templates, "templates/index.html")
33	if err != nil {
34		log.Fatal("Could not parse index template")
35		return
36	}
37}
38
39func ShowIndexPage(w http.ResponseWriter, r *http.Request) {
40	var occurrences []Occurrence
41	db.Order("month, day, name").Find(&occurrences)
42
43	data := struct {
44		Occurrences []Occurrence
45		CurrentYear uint
46	}{
47		Occurrences: occurrences,
48		CurrentYear: uint(time.Now().Year()),
49	}
50
51	err := indexTemplate.Execute(w, data)
52	if err != nil {
53		log.Println(err.Error())
54		http.Error(w, "Internal Server Error", http.StatusInternalServerError)
55	}
56}