122 lines
2.6 KiB
Go
122 lines
2.6 KiB
Go
package main
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import (
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"fmt"
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"io"
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"log"
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"net/http"
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"time"
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h "gitlab.codemonkeysoftware.net/b/hatmill"
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a "gitlab.codemonkeysoftware.net/b/hatmill/attribute"
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e "gitlab.codemonkeysoftware.net/b/hatmill/element"
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_ "gitlab.codemonkeysoftware.net/b/henwen"
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)
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const Addr = ":8080"
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const Title = "Henwen"
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const (
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PathRoot = "/"
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PathCreate = "/create"
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PathDoCreate = "/create/do"
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)
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func writePage(w io.Writer, contents h.Term) error {
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page := e.Html()(
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e.Head()(
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e.Title()(h.Text(Title)),
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),
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e.Body()(
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e.H1()(h.Text(Title)),
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e.Div()(contents),
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),
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)
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_, err := h.WriteDocument(w, page)
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return err
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}
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func pageRoot() h.Term {
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return h.Terms{
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e.H2()(h.Text("Welcome!")),
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e.A(a.Href(PathCreate))(
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h.Text("Create event"),
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),
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}
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}
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const (
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fieldNameEarliest = "earliestDate"
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fieldNameLatest = "latestDate"
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fieldNameEventName = "eventName"
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)
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func pageCreate() h.Term {
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return h.Terms{
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e.H2()(h.Text("Create an event")),
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e.Form(a.Action(PathDoCreate), a.Method("POST"))(
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e.Label(a.For(fieldNameEventName))(h.Text("Event name")),
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e.Input(a.Name(fieldNameEventName)),
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e.Label(a.For(fieldNameEarliest))(h.Text("Earliest date")),
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e.Input(a.Name(fieldNameEarliest), a.Type("date")),
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e.Label(a.For(fieldNameLatest))(h.Text("Latest date")),
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e.Input(a.Name(fieldNameLatest), a.Type("date")),
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e.Input(a.Type("submit")),
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),
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}
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}
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func pageDoCreate(name string, earliest, latest time.Time) h.Term {
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return h.Terms{
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e.H2()(h.Text("Created event!")),
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e.H3()(h.Text("Name")),
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h.Text(name),
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e.H3()(h.Text("Earliest date")),
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h.Text(earliest.Format(time.ANSIC)),
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e.H3()(h.Text("Latest date")),
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h.Text(latest.Format(time.ANSIC)),
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}
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}
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func main() {
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mux := http.NewServeMux()
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mux.HandleFunc(PathRoot, func(w http.ResponseWriter, r *http.Request) {
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_ = writePage(w, pageRoot())
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})
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mux.HandleFunc(PathCreate, func(w http.ResponseWriter, r *http.Request) {
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_ = writePage(w, pageCreate())
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})
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mux.HandleFunc(PathDoCreate, func(w http.ResponseWriter, r *http.Request) {
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const dateFmt = "2006-01-02"
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earliest, err := time.Parse(dateFmt, r.FormValue(fieldNameEarliest))
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if err != nil {
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fmt.Fprint(w, "bad earliest date")
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return
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}
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latest, err := time.Parse(dateFmt, r.FormValue(fieldNameLatest))
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if err != nil {
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fmt.Fprint(w, "bad latest date")
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return
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}
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eventName := r.FormValue(fieldNameEventName)
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if eventName == "" {
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fmt.Fprint(w, "event name is required")
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return
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}
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_ = writePage(w, pageDoCreate(eventName, earliest, latest))
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})
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srv := http.Server{
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Addr: Addr,
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Handler: mux,
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}
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log.Println(srv.ListenAndServe())
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}
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