|
| 1 | +package app |
| 2 | + |
| 3 | +import ( |
| 4 | + "encoding/json" |
| 5 | + "fmt" |
| 6 | + "io" |
| 7 | + "log" |
| 8 | + "net/http" |
| 9 | + "reflect" |
| 10 | + "strconv" |
| 11 | + |
| 12 | + "github.com/gorilla/mux" |
| 13 | + |
| 14 | + v1 "github.com/arkadiusjonczek/go-rest-api-protobuf-protovalidate-demo.git/pkg/proto/demo/v1" |
| 15 | +) |
| 16 | + |
| 17 | +type CrudHandler interface { |
| 18 | + Create(w http.ResponseWriter, r *http.Request) |
| 19 | + Read(w http.ResponseWriter, r *http.Request) |
| 20 | + ReadAll(w http.ResponseWriter, r *http.Request) |
| 21 | + Update(w http.ResponseWriter, r *http.Request) |
| 22 | + Delete(w http.ResponseWriter, r *http.Request) |
| 23 | +} |
| 24 | + |
| 25 | +type Entity interface { |
| 26 | + v1.Customer | v1.Customer2 |
| 27 | +} |
| 28 | + |
| 29 | +var _ CrudHandler = (*GenericCrudHandler[v1.Customer])(nil) |
| 30 | + |
| 31 | +type GenericCrudHandler[E Entity] struct { |
| 32 | + decoder Decoder[E] |
| 33 | + store Store[E] |
| 34 | +} |
| 35 | + |
| 36 | +func NewGenericCrudHandler[E Entity](decoder Decoder[E], store Store[E]) *GenericCrudHandler[E] { |
| 37 | + return &GenericCrudHandler[E]{ |
| 38 | + decoder: decoder, |
| 39 | + store: store, |
| 40 | + } |
| 41 | +} |
| 42 | + |
| 43 | +func (h *GenericCrudHandler[E]) Create(w http.ResponseWriter, r *http.Request) { |
| 44 | + log.Printf("Got request: %v", r) |
| 45 | + |
| 46 | + body, _ := io.ReadAll(r.Body) |
| 47 | + |
| 48 | + log.Printf("Got body: %s", body) |
| 49 | + |
| 50 | + // Unmarshal |
| 51 | + |
| 52 | + entry, err := h.decoder.Decode(body) |
| 53 | + if err != nil { |
| 54 | + w.WriteHeader(http.StatusBadRequest) |
| 55 | + fmt.Fprintf(w, "Error: %s", err) |
| 56 | + return |
| 57 | + } |
| 58 | + |
| 59 | + log.Printf("Got entry of type %s: %#v", reflect.TypeOf(entry), entry) |
| 60 | + |
| 61 | + // Add to store |
| 62 | + |
| 63 | + id, err := h.store.Add(entry) |
| 64 | + if err != nil { |
| 65 | + w.WriteHeader(http.StatusBadRequest) |
| 66 | + fmt.Fprintf(w, "Error: %s", err) |
| 67 | + return |
| 68 | + } |
| 69 | + |
| 70 | + w.WriteHeader(http.StatusOK) |
| 71 | + fmt.Fprintf(w, "Created entry with id: %d", id) |
| 72 | +} |
| 73 | + |
| 74 | +func (h *GenericCrudHandler[E]) Read(w http.ResponseWriter, r *http.Request) { |
| 75 | + log.Printf("Got request: %v", r) |
| 76 | + |
| 77 | + vars := mux.Vars(r) |
| 78 | + idString := vars["id"] |
| 79 | + |
| 80 | + id, _ := strconv.Atoi(idString) |
| 81 | + |
| 82 | + // Get from store |
| 83 | + |
| 84 | + entry, err := h.store.Get(id) |
| 85 | + if err != nil { |
| 86 | + w.WriteHeader(http.StatusBadRequest) |
| 87 | + fmt.Fprintf(w, "Error: %s", err) |
| 88 | + return |
| 89 | + } |
| 90 | + |
| 91 | + w.WriteHeader(http.StatusOK) |
| 92 | + json.NewEncoder(w).Encode(entry) |
| 93 | +} |
| 94 | + |
| 95 | +func (h *GenericCrudHandler[E]) ReadAll(w http.ResponseWriter, r *http.Request) { |
| 96 | + log.Printf("Got request: %v", r) |
| 97 | + |
| 98 | + // Get from store |
| 99 | + |
| 100 | + entries, err := h.store.GetAll() |
| 101 | + if err != nil { |
| 102 | + w.WriteHeader(http.StatusBadRequest) |
| 103 | + fmt.Fprintf(w, "Error: %s", err) |
| 104 | + return |
| 105 | + } |
| 106 | + |
| 107 | + w.WriteHeader(http.StatusOK) |
| 108 | + json.NewEncoder(w).Encode(entries) |
| 109 | +} |
| 110 | + |
| 111 | +func (h *GenericCrudHandler[E]) Update(w http.ResponseWriter, r *http.Request) { |
| 112 | + log.Printf("Got request: %v", r) |
| 113 | + |
| 114 | + vars := mux.Vars(r) |
| 115 | + idString := vars["id"] |
| 116 | + |
| 117 | + id, _ := strconv.Atoi(idString) |
| 118 | + |
| 119 | + body, _ := io.ReadAll(r.Body) |
| 120 | + |
| 121 | + log.Printf("Got body: %s", body) |
| 122 | + |
| 123 | + // Unmarshal |
| 124 | + |
| 125 | + entry, err := h.decoder.Decode(body) |
| 126 | + if err != nil { |
| 127 | + w.WriteHeader(http.StatusBadRequest) |
| 128 | + fmt.Fprintf(w, "Error: %s", err) |
| 129 | + return |
| 130 | + } |
| 131 | + |
| 132 | + log.Printf("Got entry of type %s: %#v", reflect.TypeOf(entry), entry) |
| 133 | + |
| 134 | + // Update in store |
| 135 | + |
| 136 | + err = h.store.Update(id, entry) |
| 137 | + if err != nil { |
| 138 | + w.WriteHeader(http.StatusBadRequest) |
| 139 | + fmt.Fprintf(w, "Error: %s", err) |
| 140 | + return |
| 141 | + } |
| 142 | + |
| 143 | + w.WriteHeader(http.StatusOK) |
| 144 | + fmt.Fprintf(w, "Updated entry with id: %d", id) |
| 145 | +} |
| 146 | +func (h *GenericCrudHandler[E]) Delete(w http.ResponseWriter, r *http.Request) { |
| 147 | + log.Printf("Got request: %v", r) |
| 148 | + |
| 149 | + vars := mux.Vars(r) |
| 150 | + idString := vars["id"] |
| 151 | + |
| 152 | + id, _ := strconv.Atoi(idString) |
| 153 | + |
| 154 | + // Delete in store |
| 155 | + |
| 156 | + err := h.store.Delete(id) |
| 157 | + if err != nil { |
| 158 | + w.WriteHeader(http.StatusBadRequest) |
| 159 | + fmt.Fprintf(w, "Error: %s", err) |
| 160 | + return |
| 161 | + } |
| 162 | + |
| 163 | + w.WriteHeader(http.StatusOK) |
| 164 | + fmt.Fprintf(w, "Deleted entry with id: %d", id) |
| 165 | +} |
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