feat: validate user availability

app/internal/handlers/admin_addresses.go

@@ -5,6 +5,7 @@ import (
 	"net/http"
 	"strconv"
 	"time"
+	"fmt"
 
 	"github.com/patel-mann/poll-system/app/internal/models"
 	"github.com/patel-mann/poll-system/app/internal/utils"
@@ -82,22 +83,22 @@ func AddressHandler(w http.ResponseWriter, r *http.Request) {
 
 	// Query addresses with appointment + user info
 	rows, err := models.DB.Query(`
-		SELECT 
+		SELECT
 			a.address_id,
-			a.address, 
-			a.street_name, 
+			a.address,
+			a.street_name,
 			a.street_type,
-			a.street_quadrant, 
+			a.street_quadrant,
 			a.house_number,
 			COALESCE(a.house_alpha, '') as house_alpha,
-			a.longitude, 
+			a.longitude,
 			a.latitude,
 			a.visited_validated,
 			a.created_at,
 			a.updated_at,
-			CASE 
-				WHEN ap.sched_id IS NOT NULL THEN true 
-				ELSE false 
+			CASE
+				WHEN ap.sched_id IS NOT NULL THEN true
+				ELSE false
 			END as assigned,
 			ap.user_id,
 			COALESCE(u.first_name || ' ' || u.last_name, '') as user_name,
@@ -146,12 +147,12 @@ func AddressHandler(w http.ResponseWriter, r *http.Request) {
 			log.Println("Scan error:", err)
 			continue
 		}
-		
+
 		// Handle nullable house_alpha
 		if houseAlpha != "" {
 			a.HouseAlpha = &houseAlpha
 		}
-		
+
 		addresses = append(addresses, a)
 	}
 
@@ -303,10 +304,13 @@ func AssignAddressHandler(w http.ResponseWriter, r *http.Request) {
 	}
 
 	// Parse and validate the start time
-	_, err = time.Parse("15:04", startTime)
-	if err != nil {
-		http.Error(w, "Invalid start time format", http.StatusBadRequest)
+	parsedTime, err := time.Parse("15:04", startTime)
+	is_valid := ValidatedFreeTime(parsedDate, parsedTime, userID)
+	if is_valid != true {
+		http.Error(w, "User is not availabile", http.StatusBadRequest)
 		return
+	}else{
+		fmt.Print("hello")
 	}
 
 	// Verify the user exists and is associated with the current admin
@@ -330,7 +334,7 @@ func AssignAddressHandler(w http.ResponseWriter, r *http.Request) {
 	// Check if this address is already assigned to any user
 	var exists int
 	err = models.DB.QueryRow(`
-		SELECT COUNT(*) FROM appointment 
+		SELECT COUNT(*) FROM appointment
 		WHERE address_id = $1
 	`, addressID).Scan(&exists)
 	if err != nil {
@@ -346,7 +350,7 @@ func AssignAddressHandler(w http.ResponseWriter, r *http.Request) {
 	// Check if the user already has an appointment at the same date and time
 	var timeConflict int
 	err = models.DB.QueryRow(`
-		SELECT COUNT(*) FROM appointment 
+		SELECT COUNT(*) FROM appointment
 		WHERE user_id = $1 AND appointment_date = $2 AND appointment_time = $3
 	`, userID, appointmentDate, startTime).Scan(&timeConflict)
 	if err != nil {
@@ -410,7 +414,7 @@ func RemoveAssignedAddressHandler(w http.ResponseWriter, r *http.Request) {
 	currentAdminID := r.Context().Value("user_id").(int)
 	var userExists int
 	err = models.DB.QueryRow(`
-		SELECT COUNT(*) 
+		SELECT COUNT(*)
 		FROM admin_volunteers av
 		JOIN appointment ap ON av.volunteer_id = ap.user_id
 		WHERE av.admin_id = $1 AND ap.user_id = $2 AND ap.address_id = $3