feat: add filtering by query parameter term

Author: architxkumar

internal/handler/retrival.go

@@ -6,6 +6,7 @@ import (
 	"database/sql"
 	"encoding/json"
 	"errors"
+	"fmt"
 	"log"
 	"net/http"
 
@@ -53,8 +54,9 @@ func GetPostByIdHandler(db *sql.DB) http.Handler {
 
 func GetAllPostsHandler(db *sql.DB) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		queryStmt := "select * from posts"
-		rows, err := db.QueryContext(r.Context(), queryStmt)
+		term := r.URL.Query().Get("term")
+		queryStmt := "select * from posts where title like $1 or content like $1 or category like $1"
+		rows, err := db.QueryContext(r.Context(), queryStmt, fmt.Sprintf("%%%s%%", term))
 		if err != nil {
 			log.Printf("Error querying posts: %v", err)
 			http.Error(w, "Internal server error", http.StatusInternalServerError)