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mycorrhiza/main.go
2020-06-20 14:48:23 +05:00

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package main
import (
"fmt"
"log"
"net/http"
"os"
"path/filepath"
"time"
"github.com/gorilla/mux"
)
// GetRevision finds revision with id `id` of `hyphaName` in `hyphae`.
// If `id` is `"0"`, it means the last revision.
// If no such revision is found, last return value is false.
func GetRevision(hyphaName string, id string) (Revision, bool) {
log.Println("Getting hypha", hyphaName, id)
if hypha, ok := hyphae[hyphaName]; ok {
if id == "0" {
id = hypha.NewestRevision()
}
if rev, ok := hypha.Revisions[id]; ok {
return *rev, true
}
}
return Revision{}, false
}
// RevInMap finds value of `rev` (the one from URL queries like) in the passed map that is usually got from `mux.Vars(*http.Request)`.
// If there is no `rev`, return "0".
func RevInMap(m map[string]string) string {
if id, ok := m["rev"]; ok {
return id
}
return "0"
}
// `rootWikiDir` is a directory where all wiki files reside.
// `templatesDir` is where templates are.
var rootWikiDir, templatesDir string
// `hyphae` is a map with all hyphae. Many functions use it.
var hyphae map[string]*Hypha
func main() {
if len(os.Args) == 1 {
panic("Expected a root wiki pages directory")
}
// Required so the rootWikiDir hereinbefore does not get redefined.
var err error
rootWikiDir, err = filepath.Abs(os.Args[1])
if err != nil {
panic(err)
}
templatesDir = filepath.Join(filepath.Dir(rootWikiDir), "templates")
log.Println("Welcome to MycorrhizaWiki α")
log.Println("Indexing hyphae...")
hyphae = recurFindHyphae(rootWikiDir)
log.Println("Indexed", len(hyphae), "hyphae. Ready to accept requests.")
// Start server code. See handlers.go for handlers' implementations.
r := mux.NewRouter()
r.Queries("action", "getBinary", "rev", revQuery).Path(hyphaUrl).
HandlerFunc(HandlerGetBinary)
r.Queries("action", "getBinary").Path(hyphaUrl).
HandlerFunc(HandlerGetBinary)
r.Queries("action", "raw", "rev", revQuery).Path(hyphaUrl).
HandlerFunc(HandlerRaw)
r.Queries("action", "raw").Path(hyphaUrl).
HandlerFunc(HandlerRaw)
r.Queries("action", "zen", "rev", revQuery).Path(hyphaUrl).
HandlerFunc(HandlerZen)
r.Queries("action", "zen").Path(hyphaUrl).
HandlerFunc(HandlerZen)
r.Queries("action", "view", "rev", revQuery).Path(hyphaUrl).
HandlerFunc(HandlerView)
r.Queries("action", "view").Path(hyphaUrl).
HandlerFunc(HandlerView)
r.Queries("action", "history").Path(hyphaUrl).
HandlerFunc(HandlerHistory)
r.Queries("action", "edit").Path(hyphaUrl).
HandlerFunc(HandlerEdit)
r.Queries("action", "rewind", "rev", revQuery).Path(hyphaUrl).
HandlerFunc(HandlerRewind)
r.Queries("action", "delete").Path(hyphaUrl).
HandlerFunc(HandlerDelete)
r.Queries("action", "rename", "to", hyphaPattern).Path(hyphaUrl).
HandlerFunc(HandlerRename)
r.Queries("action", "update").Path(hyphaUrl).Methods("POST").
HandlerFunc(HandlerUpdate)
r.HandleFunc(hyphaUrl, HandlerView)
// Debug page that renders all hyphae.
// TODO: make it redirect to home page.
// TODO: make a home page.
r.HandleFunc("/", func(w http.ResponseWriter, rq *http.Request) {
w.Header().Set("Content-Type", "text/html; charset=utf-8")
w.WriteHeader(http.StatusOK)
for _, h := range hyphae {
log.Println("Rendering latest revision of hypha", h.FullName)
html, err := h.AsHtml("0", w)
if err != nil {
fmt.Fprintln(w, err)
}
fmt.Fprintln(w, html)
}
})
http.Handle("/", r)
srv := &http.Server{
Handler: r,
Addr: "127.0.0.1:8000",
// Good practice: enforce timeouts for servers you create!
WriteTimeout: 15 * time.Second,
ReadTimeout: 15 * time.Second,
}
log.Fatal(srv.ListenAndServe())
}