dorfylegends/backend/main.go

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package main
import (
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"embed"
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"encoding/json"
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"flag"
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"fmt"
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"html/template"
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"io/fs"
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"net/http"
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_ "net/http/pprof"
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"os"
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"runtime"
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"sort"
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"strconv"
"strings"
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"github.com/gorilla/mux"
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"github.com/pkg/profile"
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"github.com/robertjanetzko/LegendsBrowser2/backend/model"
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"github.com/robertjanetzko/LegendsBrowser2/backend/templates"
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)
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var world *model.DfWorld
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//go:embed resources/frontend
var frontend embed.FS
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func main() {
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f := flag.String("f", "", "open a file")
flag.Parse()
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router := mux.NewRouter().StrictSlash(true)
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functions := template.FuncMap{
"json": func(obj any) string {
b, err := json.MarshalIndent(obj, "", " ")
if err != nil {
fmt.Println(err)
return ""
}
return string(b)
},
"check": func(condition bool, v any) any {
if condition {
return v
}
return nil
},
"title": func(input string) string {
words := strings.Split(input, " ")
smallwords := " a an on the to of "
for index, word := range words {
if strings.Contains(smallwords, " "+word+" ") && index > 0 {
words[index] = word
} else {
words[index] = strings.Title(word)
}
}
return strings.Join(words, " ")
},
"getHf": func(id int) *model.HistoricalFigure { return world.HistoricalFigures[id] },
"getEntity": func(id int) *model.Entity { return world.Entities[id] },
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"events": func(obj model.Identifiable) []*model.HistoricalEvent {
id := obj.Id()
var list []*model.HistoricalEvent
switch obj.(type) {
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case *model.Entity:
for _, e := range world.HistoricalEvents {
if e.Details.RelatedToEntity(id) {
list = append(list, e)
}
}
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case *model.HistoricalFigure:
for _, e := range world.HistoricalEvents {
if e.Details.RelatedToHf(id) {
list = append(list, e)
}
}
default:
fmt.Printf("unknown type %T\n", obj)
}
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sort.Slice(list, func(a, b int) bool { return list[a].Id_ < list[b].Id_ })
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return list
},
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"season": func(seconds int) string {
r := ""
month := seconds % 100800
if month <= 33600 {
r += "early "
} else if month <= 67200 {
r += "mid"
} else if month <= 100800 {
r += "late "
}
season := seconds % 403200
if season < 100800 {
r += "spring"
} else if season < 201600 {
r += "summer"
} else if season < 302400 {
r += "autumn"
} else if season < 403200 {
r += "winter"
}
return r
},
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}
t := templates.New(functions)
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if len(*f) > 0 {
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defer profile.Start(profile.MemProfile).Stop()
go func() {
http.ListenAndServe(":8081", nil)
}()
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w, err := model.Parse(*f)
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if err != nil {
fmt.Println(err)
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os.Exit(1)
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}
world = w
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fmt.Println("Hallo Welt!")
runtime.GC()
// world.Process()
// model.ListOtherElements("world", &[]*model.World{&world})
// model.ListOtherElements("region", &world.Regions)
// model.ListOtherElements("underground regions", &world.UndergroundRegions)
// model.ListOtherElements("landmasses", &world.Landmasses)
// model.ListOtherElements("sites", &world.Sites)
// model.ListOtherElements("world constructions", &world.WorldConstructions)
// model.ListOtherElements("artifacts", &world.Artifacts)
// model.ListOtherElements("entities", &world.Entities)
// model.ListOtherElements("hf", &world.HistoricalFigures)
// model.ListOtherElements("events", &world.HistoricalEvents)
// model.ListOtherElements("collections", &world.HistoricalEventCollections)
// model.ListOtherElements("era", &world.HistoricalEras)
// model.ListOtherElements("danceForm", &world.DanceForms)
// model.ListOtherElements("musicalForm", &world.MusicalForms)
// model.ListOtherElements("poeticForm", &world.PoeticForms)
// model.ListOtherElements("written", &world.WrittenContents)
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// server.RegisterResource(router, "region", world.Regions)
// // server.RegisterResource(router, "undergroundRegion", world.UndergroundRegions)
// server.RegisterResource(router, "landmass", world.Landmasses)
// server.RegisterResource(router, "site", world.Sites)
// server.RegisterResource(router, "worldConstruction", world.WorldConstructions)
// server.RegisterResource(router, "artifact", world.Artifacts)
// server.RegisterResource(router, "hf", world.HistoricalFigures)
// server.RegisterResource(router, "collection", world.HistoricalEventCollections)
// server.RegisterResource(router, "entity", world.Entities)
// server.RegisterResource(router, "event", world.HistoricalEvents)
// // server.RegisterResource(router, "era", world.HistoricalEras)
// server.RegisterResource(router, "danceForm", world.DanceForms)
// server.RegisterResource(router, "musicalForm", world.MusicalForms)
// server.RegisterResource(router, "poeticForm", world.PoeticForms)
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// server.RegisterResource(router, "written", world.WrittenContents)
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RegisterPage(router, "/entity/{id}", t, "entity.html", func(id int) any { return world.Entities[id] })
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RegisterPage(router, "/hf/{id}", t, "hf.html", func(id int) any { return world.HistoricalFigures[id] })
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}
spa := spaHandler{staticFS: frontend, staticPath: "resources/frontend", indexPath: "index.html"}
router.PathPrefix("/").Handler(spa)
fmt.Println("Serving at :8080")
http.ListenAndServe(":8080", router)
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}
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func RegisterPage(router *mux.Router, path string, templates *templates.Template, template string, accessor func(int) any) {
get := func(w http.ResponseWriter, r *http.Request) {
id, err := strconv.Atoi(mux.Vars(r)["id"])
if err != nil {
fmt.Fprintln(w, err)
fmt.Println(err)
}
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fmt.Println("render", template, id)
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err = templates.Render(w, template, accessor(id))
if err != nil {
fmt.Fprintln(w, err)
fmt.Println(err)
}
}
router.HandleFunc(path, get).Methods("GET")
}
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type spaHandler struct {
staticFS embed.FS
staticPath string
indexPath string
}
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func (h spaHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
// get the absolute path to prevent directory traversal
path := r.URL.Path
// if err != nil {
// // if we failed to get the absolute path respond with a 400 bad request and stop
// http.Error(w, err.Error(), http.StatusBadRequest)
// return
// }
// prepend the path with the path to the static directory
path = h.staticPath + path
fmt.Println(path)
_, err := h.staticFS.Open(path)
if os.IsNotExist(err) {
// file does not exist, serve index.html
fmt.Println(path)
index, err := h.staticFS.ReadFile(h.staticPath + "/" + h.indexPath)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "text/html; charset=utf-8")
w.WriteHeader(http.StatusAccepted)
w.Write(index)
return
} else if err != nil {
// if we got an error (that wasn't that the file doesn't exist) stating the
// file, return a 500 internal server error and stop
http.Error(w, err.Error(), http.StatusInternalServerError)
return
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}
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// get the subdirectory of the static dir
statics, err := fs.Sub(h.staticFS, h.staticPath)
// otherwise, use http.FileServer to serve the static dir
http.FileServer(http.FS(statics)).ServeHTTP(w, r)
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}