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package backend
import (
"html/template"
"iter"
"net/http"
"os"
"path/filepath"
"slices"
"github.com/go-chi/chi/v5"
)
var (
rootContent = map[string]*rootData{}
)
type homeData struct {
*data
Sections []*Section
}
func (h *homeData) SetData(d *data) {
h.data = d
}
func HandleHome(r *chi.Mux) {
r.Get("/", func(w http.ResponseWriter, r *http.Request) {
cfg := r.Context().Value(configKey).(*Config)
d := handleGenericSectionDisplay(w, r, cfg.Sections, 4)
if d == nil {
return
}
d.handleGeneric(w, r, "home", d)
})
}
func Handle404(r *chi.Mux) {
r.NotFound(notFound)
}
func notFound(w http.ResponseWriter, r *http.Request) {
d := new(data)
d.title = "404"
w.WriteHeader(http.StatusNotFound)
d.handleGeneric(w, r, "404", d)
}
type rootData struct {
*data
Content template.HTML
}
func (l *rootData) SetData(d *data) {
l.data = d
}
func HandleRoot(r *chi.Mux, cfg *Config) {
err := os.Mkdir(cfg.RootFolder, 0774)
if err != nil && !os.IsExist(err) {
panic(err)
}
r.Get("/rss", handleGenericRSS)
r.Get("/rss/", handleGenericRSS)
r.Get("/{name:[a-zA-Z-]+}", func(w http.ResponseWriter, r *http.Request) {
handleGenericRoot(w, r, chi.URLParam(r, "name"))
})
}
func handleGenericRoot(w http.ResponseWriter, r *http.Request, name string) {
d := new(rootData)
d.data = new(data)
if c, ok := rootContent[name]; ok {
*d = *c
} else {
cfg := r.Context().Value(configKey).(*Config)
path := filepath.Join(cfg.RootFolder, name+".md")
b, err := os.ReadFile(path)
if err != nil {
if os.IsNotExist(err) {
notFound(w, r)
return
}
panic(err)
}
d.URL = "/" + name
d.Content, ok = parse(b, new(EntryInfo), d.data)
if !ok {
w.WriteHeader(http.StatusInternalServerError)
return
}
rootContent[name] = d
}
d.handleGeneric(w, r, "simple", d)
}
func handleGenericRSS(w http.ResponseWriter, r *http.Request) {
cfg := r.Context().Value(configKey).(*Config)
var data iter.Seq[*sectionData]
for _, sec := range cfg.Sections {
if len(sec.Data) == 0 {
sec.sort()
}
var sl []*sectionData
for _, d := range sec.Data[:min(3, len(sec.Data))] {
dd := *d
dd.Slug = sec.URI + "/" + dd.Slug
sl = append(sl, &dd)
}
if data == nil {
data = slices.Values(sl)
} else {
data = slices.Values(slices.AppendSeq(sl, data))
}
}
var s Section
s.Data = sort(data)
s.Name = cfg.Name
s.Description = cfg.Description
s.URI = ""
s.handleRSS(w, r)
}
func handleGenericSectionDisplay(_ http.ResponseWriter, _ *http.Request, sections []Section, maxLogsPerPage int) *homeData {
d := new(homeData)
d.data = new(data)
for _, sec := range sections {
if len(sec.Data) == 0 {
sec.sort()
}
sec.LenMax = maxLogsPerPage
sec.Data = sec.Data[:min(maxLogsPerPage, len(sec.Data))]
d.Sections = append(d.Sections, &sec)
}
return d
}
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