91 lines
2.1 KiB
Go
91 lines
2.1 KiB
Go
package main
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import (
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"Backend/models"
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"database/sql"
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"encoding/json"
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"fmt"
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"log"
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"net/http"
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"net/url"
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"os"
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"strconv"
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_ "github.com/lib/pq"
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)
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var DB *sql.DB
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func main() {
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var err error
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dbConnStr := getDBConn()
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DB, err = sql.Open("postgres", dbConnStr)
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if err!= nil {
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log.Fatal(err)
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}
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defer DB.Close()
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http.HandleFunc("/time", timeHandler)
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fmt.Println("Server is running at http://localhost:8080")
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log.Fatal(http.ListenAndServe(":8080", nil))
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}
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func timeHandler(w http.ResponseWriter, r *http.Request) {
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switch r.Method {
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case "PUT":
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createBooking(w, r)
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default:
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http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
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}
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}
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func createBooking(w http.ResponseWriter, r *http.Request) {
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booking := getBooking(r.URL.Query())
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if models.VerifyBooking(booking) {
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err := models.InsertBooking(booking, DB)
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if err == fmt.Errorf("the same booking already exists") {
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http.Error(w, "Booking already exists", http.StatusConflict)
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return
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}
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if err != nil {
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log.Println("Error inserting booking: ", err)
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http.Error(w, "Internal Server Error", http.StatusInternalServerError)
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return
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}
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w.WriteHeader(http.StatusAccepted)
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json.NewEncoder(w).Encode(booking)
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}
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w.WriteHeader(http.StatusBadRequest)
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}
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func getBooking(query_params url.Values) models.Booking {
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bookingType, err := strconv.Atoi(query_params.Get("bookingType"))
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if err!= nil {
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log.Println("Error parsing bookingType: ", err)
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return models.Booking{}
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}
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return models.Booking{
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CradID: query_params.Get("cardID"),
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ReaderID: query_params.Get("readerID"),
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BookingType: bookingType,
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}
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}
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func getDBConn() string {
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dbHost := getEnv("POSTGRES_HOST", "localhost")
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dbName := getEnv("POSTGRES_DB", "arbeitszeitmessung")
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dbUser := getEnv("POSTGRES_USER", "arbeit_zeit")
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dbPassword := getEnv("POSTGRES_PASS", "password")
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return fmt.Sprintf("postgres://%s:%s@%s:5432/%s?sslmode=disable", dbUser, dbPassword, dbHost, dbName)
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}
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func getEnv(key, fallback string) string {
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if value, ok := os.LookupEnv(key); ok {
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return value
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}
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return fallback
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}
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