1package main
  2
  3import (
  4	"html/template"
  5	"log"
  6	"net/http"
  7	"regexp"
  8)
  9
 10// PageData holds common data passed to templates
 11type PageData struct {
 12	Title       string
 13	ServiceName string
 14	Content     interface{}
 15}
 16
 17// home displays the buylater.email landing page
 18func home(w http.ResponseWriter, r *http.Request) {
 19	w.Header().Add("Server", "buylater.email")
 20
 21	// Parse templates with inheritance
 22	ts, err := template.ParseFiles(
 23		"./ui/html/layouts/base.tmpl",
 24		"./ui/html/pages/home.tmpl",
 25	)
 26	if err != nil {
 27		log.Println(err.Error())
 28		http.Error(w, "Internal Server Error", 500)
 29		return
 30	}
 31
 32	// Prepare template data
 33	data := PageData{
 34		Title:       "Home",
 35		ServiceName: "buylater.email",
 36		Content:     nil,
 37	}
 38
 39	// Execute template - specify the base template name
 40	err = ts.ExecuteTemplate(w, "base", data)
 41	if err != nil {
 42		log.Println(err.Error())
 43		http.Error(w, "Internal Server Error", 500)
 44	}
 45}
 46
 47// submitForm displays the email submission form for scheduling purchase reminders
 48func submitForm(w http.ResponseWriter, r *http.Request) {
 49	w.Header().Add("Server", "buylater.email")
 50
 51	// Parse templates with inheritance
 52	ts, err := template.ParseFiles(
 53		"./ui/html/layouts/base.tmpl",
 54		"./ui/html/pages/submit.tmpl",
 55	)
 56	if err != nil {
 57		log.Println(err.Error())
 58		http.Error(w, "Internal Server Error", 500)
 59		return
 60	}
 61
 62	// Prepare template data
 63	data := PageData{
 64		Title:       "Submit",
 65		ServiceName: "buylater.email",
 66		Content:     nil,
 67	}
 68
 69	// Execute template - specify the base template name
 70	err = ts.ExecuteTemplate(w, "base", data)
 71	if err != nil {
 72		log.Println(err.Error())
 73		http.Error(w, "Internal Server Error", 500)
 74	}
 75}
 76
 77// processSubmit handles the form submission and schedules the email reminder
 78func processSubmit(w http.ResponseWriter, r *http.Request) {
 79	w.Header().Add("Server", "buylater.email")
 80
 81	// Parse templates with inheritance
 82	ts, err := template.ParseFiles(
 83		"./ui/html/layouts/base.tmpl",
 84		"./ui/html/pages/complete.tmpl",
 85	)
 86	if err != nil {
 87		log.Println(err.Error())
 88		http.Error(w, "Internal Server Error", 500)
 89		return
 90	}
 91
 92	// Prepare template data
 93	data := PageData{
 94		Title:       "Submission Complete",
 95		ServiceName: "buylater.email",
 96		Content:     nil,
 97	}
 98
 99	// Execute template
100	err = ts.ExecuteTemplate(w, "base", data)
101	if err != nil {
102		log.Println(err.Error())
103		http.Error(w, "Internal Server Error", 500)
104	}
105}
106
107// confirmWithToken handles magic link confirmation with token validation
108func confirmWithToken(w http.ResponseWriter, r *http.Request) {
109	token := r.PathValue("token")
110
111	if !isValidToken(token) {
112		w.Header().Add("Server", "buylater.email")
113		http.NotFound(w, r)
114		return
115	}
116
117	w.Header().Add("Server", "buylater.email")
118	w.WriteHeader(http.StatusOK)
119	w.Write([]byte("Email Confirmed! Your purchase reminder has been activated via magic link."))
120}
121
122// isValidToken validates that the token is alphanumeric and at least 32 characters
123func isValidToken(token string) bool {
124	if len(token) < 32 {
125		return false
126	}
127
128	// Check if token contains only alphanumeric characters
129	matched, _ := regexp.MatchString("^[a-zA-Z0-9]+$", token)
130	return matched
131}
132
133// about displays information about the buylater.email service
134func about(w http.ResponseWriter, r *http.Request) {
135	w.Header().Add("Server", "buylater.email")
136
137	// Parse templates with inheritance
138	ts, err := template.ParseFiles(
139		"./ui/html/layouts/base.tmpl",
140		"./ui/html/pages/about.tmpl",
141	)
142	if err != nil {
143		log.Println(err.Error())
144		http.Error(w, "Internal Server Error", 500)
145		return
146	}
147
148	// Prepare template data
149	data := PageData{
150		Title:       "About",
151		ServiceName: "buylater.email",
152		Content:     nil,
153	}
154
155	// Execute template
156	err = ts.ExecuteTemplate(w, "base", data)
157	if err != nil {
158		log.Println(err.Error())
159		http.Error(w, "Internal Server Error", 500)
160	}
161}