Initial commit

2026-07-12 13:47:34 +04:00
commit 51e2e789d0
37 changed files with 2005 additions and 0 deletions
@@ -0,0 +1,213 @@
+package handlers
+
+import (
+	"encoding/json"
+	"github.com/gorilla/mux"
+	"go_project/internal/configuration"
+	"go_project/internal/connection"
+	"go_project/internal/controllers"
+	"log"
+	"net/http"
+	"strconv"
+)
+
+func GetAllTables(response http.ResponseWriter, request *http.Request) {
+	log.Println("GetAllTables Serving:", request.URL.Path, "from", request.Host)
+
+	sqlHandler, err := connection.OpenDefault()
+	if err != nil {
+		log.Println("Error opening database connection:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+	defer connection.MustClose(sqlHandler)
+
+	limit, offset := configuration.GetRecordsLimit(), configuration.GetRecordsOffset()
+	listTableParams := controllers.ListTableParams{Limit: limit, Offset: offset}
+
+	allTables, err := controllers.AllTables(sqlHandler, listTableParams)
+	if err != nil {
+		log.Println("Error getting all tables from database:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	allTablesMarshaled, err := json.Marshal(allTables)
+	if err != nil {
+		log.Println("Error marshaling all tables:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	response.Header().Set("Content-Type", "application/json")
+	_, err = response.Write(allTablesMarshaled)
+	if err != nil {
+		log.Println("Error writing all tables to response:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+	response.WriteHeader(http.StatusOK)
+}
+
+func GetTableById(response http.ResponseWriter, request *http.Request) {
+	log.Println("GetTableById Serving:", request.URL.Path, "from", request.Host)
+
+	sqlHandler, err := connection.OpenDefault()
+	if err != nil {
+		log.Println("Error opening database connection:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+	defer connection.MustClose(sqlHandler)
+
+	requestVars := mux.Vars(request)
+	tableIdStringValue := requestVars["id"]
+
+	id, err := strconv.Atoi(tableIdStringValue)
+	if err != nil {
+		log.Println("Current id string value of the table record to get: \"" + tableIdStringValue + "\"")
+		log.Println("Error parse id string value to int:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	table, err := controllers.TableById(sqlHandler, id)
+	if err != nil {
+		log.Println("Error getting table by id from database:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	tableMarshaled, err := json.Marshal(table)
+	if err != nil {
+		log.Println("Error marshaling table to json string format:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	response.Header().Set("Content-Type", "application/json")
+	_, err = response.Write(tableMarshaled)
+	if err != nil {
+		log.Println("Error writing table to response:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+	response.WriteHeader(http.StatusOK)
+}
+
+func CreateTable(response http.ResponseWriter, request *http.Request) {
+	log.Println("CreateTable Serving:", request.URL.Path, "from", request.Host)
+
+	sqlHandler, err := connection.OpenDefault()
+	if err != nil {
+		log.Println("Error opening database connection:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+	defer connection.MustClose(sqlHandler)
+
+	var createTableParams controllers.CreateTableParams
+	err = json.NewDecoder(request.Body).Decode(&createTableParams)
+	if err != nil {
+		log.Println("CreateTable: Values of createTableParams:", createTableParams)
+		log.Println("Error unmarshaling table from json string format:", err)
+		response.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	newTable, err := controllers.CreateTable(sqlHandler, createTableParams)
+	if err != nil {
+		log.Println("Error creating table:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	newTableMarshaled, err := json.Marshal(newTable)
+	if err != nil {
+		log.Println("Error marshaling table to json string format:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	response.Header().Set("Content-Type", "application/json")
+	_, err = response.Write(newTableMarshaled)
+	if err != nil {
+		log.Println("Error writing table to response:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+	response.WriteHeader(http.StatusOK)
+}
+
+func DeleteTableById(response http.ResponseWriter, request *http.Request) {
+	log.Println("DeleteTableById Serving:", request.URL.Path, "from", request.Host)
+
+	sqlHandler, err := connection.OpenDefault()
+	if err != nil {
+		log.Println("Error opening database connection:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+	defer connection.MustClose(sqlHandler)
+
+	requestVars := mux.Vars(request)
+	tableIdStringValue := requestVars["id"]
+
+	id, err := strconv.Atoi(tableIdStringValue)
+	if err != nil {
+		log.Println("Current id string value of the table record to delete: \"" + tableIdStringValue + "\"")
+		log.Println("Error parse id string value to int:", err)
+		response.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	sqlResult, err := controllers.DeleteTableById(sqlHandler, id)
+	if err != nil {
+		log.Println("Error deleting table by id from database:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	rowsAffected, err := sqlResult.RowsAffected()
+	if err != nil {
+		log.Println("Error getting number of rows affected by an delete:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	log.Println("SQL result: Number of rows affected by an delete:", rowsAffected)
+
+	response.WriteHeader(http.StatusOK)
+}
+
+func UpdateTable(response http.ResponseWriter, request *http.Request) {
+	log.Println("UpdateTableById Serving:", request.URL.Path, "from", request.Host)
+
+	sqlHandler, err := connection.OpenDefault()
+	if err != nil {
+		log.Println("Error opening database connection:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+	defer connection.MustClose(sqlHandler)
+
+	var updateTableParams controllers.UpdateTableParams
+	err = json.NewDecoder(request.Body).Decode(&updateTableParams)
+	if err != nil {
+		log.Println("UpdateTable: Values of updateTableParams:", updateTableParams)
+		log.Println("Error unmarshaling table from json string format:", err)
+		response.WriteHeader(http.StatusBadRequest)
+		return
+	}
+
+	newTable, err := controllers.UpdateTable(sqlHandler, updateTableParams)
+	if err != nil {
+		log.Println("Error updating table by id from database:", err)
+		response.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	log.Println("SQL result: Updated table record is:", newTable)
+
+	response.WriteHeader(http.StatusOK)
+}