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package handler
import (
"context"
"encoding/json"
"fmt"
"io"
"log"
"net/http"
"strings"
"time"
"github.com/jmoiron/sqlx"
_ "github.com/lib/pq"
"github.com/segmentio/kafka-go"
)
type Handler struct {
db DB
kafka_writer *kafka.Writer
}
func NewHandler(db *sqlx.DB, kafka_writer *kafka.Writer) Handler {
return Handler{
db: NewDB(db),
kafka_writer: kafka_writer,
}
}
func (h Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
api_key := r.Header.Get("API_KEY")
log.Println("API KEY: ", api_key)
user_id, err := h.db.GetUserIDByAPIKey(r.Context(), api_key)
if err != nil {
http.Error(w, fmt.Sprintf("Internal server error: %s", err), http.StatusInternalServerError)
return
}
if user_id == "" {
http.Error(w, "Unauthorized", http.StatusUnauthorized)
return
}
log.Println("User ID: ", user_id)
switch r.Method {
case http.MethodGet:
h.handleGet(w, r, user_id)
case http.MethodPost:
h.handlePost(w, r, user_id)
default:
http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
}
}
func (h Handler) handleGet(w http.ResponseWriter, r *http.Request, user_id string) {
if strings.Contains(r.URL.Path, "/file/") {
h.handleGetFile(w, r, user_id)
} else if strings.Contains(r.URL.Path, "/restored-files/") {
h.handleGetRestoredFiles(w, r, user_id)
} else {
fmt.Println("Path: ", r.URL.Path)
http.NotFound(w, r)
}
}
func (h Handler) handleGetFile(w http.ResponseWriter, r *http.Request, user_id string) {
filePath := r.URL.Query().Get("path")
if filePath == "" {
http.Error(w, "Invalid file path", http.StatusBadRequest)
return
}
log.Println("File path: ", filePath)
ctx, cancel := context.WithTimeout(r.Context(), 5*time.Second)
defer cancel()
file, err := h.db.GetLatestFileByPath(ctx, filePath, user_id)
if err != nil {
http.Error(w, fmt.Sprintf("Internal server error: %s", err), http.StatusInternalServerError)
return
}
bytes, err := json.Marshal(file)
if err != nil {
http.Error(w, fmt.Sprintf("Internal server error: %s", err), http.StatusInternalServerError)
return
}
fmt.Fprint(w, string(bytes))
}
func (h Handler) handleGetRestoredFiles(w http.ResponseWriter, r *http.Request, user_id string) {
ctx, cancel := context.WithTimeout(r.Context(), 5*time.Second)
defer cancel()
files, err := h.db.GetAndDeleteRestoredFiles(ctx, user_id)
if err != nil {
http.Error(w, fmt.Sprintf("Internal server error: %s", err), http.StatusInternalServerError)
return
}
bytes, err := json.Marshal(files)
if err != nil {
http.Error(w, fmt.Sprintf("Internal server error: %s", err), http.StatusInternalServerError)
return
}
fmt.Fprint(w, string(bytes))
}
func (h Handler) handlePost(w http.ResponseWriter, r *http.Request, user_id string) {
if !strings.Contains(r.URL.Path, "/file/") {
http.NotFound(w, r)
return
}
bytes, err := io.ReadAll(io.Reader(r.Body))
if err != nil {
log.Fatal(err)
}
ctx, cancel := context.WithTimeout(r.Context(), 5*time.Second)
defer cancel()
err = h.kafka_writer.WriteMessages(ctx, kafka.Message{
Key: []byte("key"), //TODO:This routes to a partition. We should probably route by agent UUID TODO: wont this negate having multiple topics
Value: bytes,
Headers: []kafka.Header{{
Key: "user_id",
Value: []byte(user_id),
}},
})
if err != nil {
log.Fatal(err)
}
fmt.Fprint(w, "Hello, World!", string(bytes))
log.Println("Request received :)", r.RemoteAddr, string(bytes))
}
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