Add `register` HTTP handler

This allows users to register.

1 files changed, 47 insertions, 4 deletions

diff --git a/handlers.go b/handlers.go
index d28a491..e6d60fb 100644
--- a/handlers.go
+++ b/handlers.go
@@ -1,7 +1,9 @@
 package main
 
 import (
+	"database/sql"
 	"embed"
+	"encoding/json"
 	"fmt"
 	"io/fs"
 	"log"
@@ -13,8 +15,9 @@ import (
 //go:embed build/frontend/public
 var frontendEmbed embed.FS
 
-func registerHandlers(r *mux.Router) {
-	r.HandleFunc("/api/version", version)
+func registerHandlers(r *mux.Router, db *sql.DB) {
+	r.Handle("/api/version", version(db))
+	r.Handle("/api/registration", register(db))
 
 	// frontend must come last to make sure /api takes precedence
 	frontend, err := fs.Sub(frontendEmbed, "build/frontend/public")
@@ -24,6 +27,46 @@ func registerHandlers(r *mux.Router) {
 	r.PathPrefix("/").Handler(http.FileServerFS(frontend))
 }
 
-func version(w http.ResponseWriter, r *http.Request) {
-	fmt.Fprint(w, versionTxt)
+func version(db *sql.DB) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		fmt.Fprint(w, versionTxt)
+	})
+}
+
+func register(db *sql.DB) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		var data struct {
+			Username string
+			Password string
+		}
+
+		dec := json.NewDecoder(r.Body)
+		dec.DisallowUnknownFields()
+
+		err := dec.Decode(&data)
+		if err != nil {
+			log.Printf("Failed to decode: %v", err)
+			w.WriteHeader(http.StatusBadRequest)
+			return
+		}
+
+		if data.Username == "" {
+			log.Print("Got registration request with empty username")
+			w.WriteHeader(http.StatusBadRequest)
+			return
+		}
+
+		if data.Password == "" {
+			log.Print("Got registration request with empty password")
+			w.WriteHeader(http.StatusBadRequest)
+			return
+		}
+
+		err = Register(db, data.Username, data.Password)
+		if err != nil {
+			log.Printf("Failed to register new user: %v", err)
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+	})
 }