136 lines
2.6 KiB
Go
Executable File
136 lines
2.6 KiB
Go
Executable File
// TODO: READ AND UNDERSTAND
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package main
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import (
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"context"
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"encoding/json"
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"net/http"
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"strconv"
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"github.com/go-chi/chi/v5"
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)
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// GET /quotes
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func getQuotes(w http.ResponseWriter, r *http.Request) {
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rows, err := db.Query(context.Background(), "SELECT * FROM hlaskovnik;")
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if err != nil {
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http.Error(w, err.Error(), 500)
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return
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}
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defer rows.Close()
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var quotes []Quote
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for rows.Next() {
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var q Quote
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rows.Scan(&q.Id, &q.Author, &q.Body)
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quotes = append(quotes, q)
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}
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w.Header().Set("Content-Type", "application/json")
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json.NewEncoder(w).Encode(quotes)
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}
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// POST /quotes
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func createQuote(w http.ResponseWriter, r *http.Request) {
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var q Quote
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err := json.NewDecoder(r.Body).Decode(&q)
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if err != nil {
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http.Error(w, "Invalid JSON", 400)
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return
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}
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err = db.QueryRow(
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context.Background(),
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"INSERT INTO hlaskovnik(author, body) VALUES($1, $2) RETURNING id;",
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q.Author, q.Body,
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).Scan(&q.Id)
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if err != nil {
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http.Error(w, err.Error(), 500)
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return
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}
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w.Header().Set("Content-Type", "application/json")
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json.NewEncoder(w).Encode(q)
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}
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// PUT /quotes/{id}
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func updateQuote(w http.ResponseWriter, r *http.Request) {
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// get ID from URL
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idParam := chi.URLParam(r, "id")
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id, err := strconv.Atoi(idParam)
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if err != nil {
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http.Error(w, "Invalid ID", http.StatusBadRequest)
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return
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}
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// parse request body
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var q Quote
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err = json.NewDecoder(r.Body).Decode(&q)
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if err != nil {
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http.Error(w, "Invalid JSON", http.StatusBadRequest)
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return
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}
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// update DB
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commandTag, err := db.Exec(
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context.Background(),
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`UPDATE hlaskovnik
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SET author=$1, body=$2
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WHERE id=$3`,
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q.Author, q.Body, id,
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)
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if err != nil {
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http.Error(w, err.Error(), 500)
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return
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}
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// check if row exists
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if commandTag.RowsAffected() == 0 {
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http.Error(w, "Quote not found", http.StatusNotFound)
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return
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}
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// return updated object
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q.Id = id
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w.Header().Set("Content-Type", "application/json")
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json.NewEncoder(w).Encode(q)
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}
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// DELETE /quotes{id}
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func deleteQuote(w http.ResponseWriter, r *http.Request) {
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// get id from URL
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idParam := chi.URLParam(r, "id")
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// convert string → int
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id, err := strconv.Atoi(idParam)
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if err != nil {
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http.Error(w, "Invalid ID", http.StatusBadRequest)
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return
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}
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// execute delete
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commandTag, err := db.Exec(
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context.Background(),
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"DELETE FROM hlaskovnik WHERE id=$1",
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id,
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)
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if err != nil {
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http.Error(w, err.Error(), 500)
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return
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}
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// check if anything was deleted
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if commandTag.RowsAffected() == 0 {
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http.Error(w, "Quote not found", http.StatusNotFound)
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return
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}
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// success response
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w.WriteHeader(http.StatusNoContent) // 204
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}
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