UI updates and bug fixes

src/App.tsx

@@ -30,7 +30,8 @@ function HabitTrackerContent() {
     addHabit: addHabitApi, 
     toggleHabit, 
     updateHabit, 
-    deleteHabit 
+    deleteHabit, 
+    error 
   } = useHabits();
   
   const { 
@@ -88,26 +89,23 @@ function HabitTrackerContent() {
   const renderHabitsView = () => (
     <div className="flex-1">
       <div className="max-w-5xl mx-auto">
-        <div className="mb-8 flex items-center gap-4">
+        <div className="mb-8">
-          <input
+          <form onSubmit={handleAddHabit} className="flex items-center gap-4">
-            type="text"
+            <input
-            value={newHabit}
+              type="text"
-            onChange={(e) => setNewHabit(e.target.value)}
+              value={newHabit}
-            onKeyPress={(e) => {
+              onChange={(e) => setNewHabit(e.target.value)}
-              if (e.key === 'Enter' && newHabit.trim()) {
+              placeholder="Add a new habit"
-                handleAddHabit(e);
+              className={`flex-1 px-4 py-2 rounded-lg ${theme.input}`}
-              }
+            />
-            }}
+            <button
-            placeholder="Add a new habit"
+              type="submit"
-            className={`flex-1 px-4 py-2 rounded-lg ${theme.input}`}
+              disabled={!newHabit.trim()}
-          />
+              className={`px-4 py-2 rounded-lg ${theme.button.primary} disabled:opacity-50`}
-          <button
+            >
-            onClick={handleAddHabit}
+              Add Habit
-            disabled={!newHabit.trim()}
+            </button>
-            className={`px-4 py-2 rounded-lg ${theme.button.primary} disabled:opacity-50`}
+          </form>
-          >
-            Add Habit
-          </button>
         </div>
 
         <div className="mb-6">
@@ -124,9 +122,7 @@ function HabitTrackerContent() {
                 <ChevronLeft className="h-5 w-5" />
               </button>
               <button
-                onClick={() => {
+                onClick={goToCurrentWeek}
-                  setCurrentWeek(getCurrentWeekDates());
-                }}
                 className={`px-4 py-2 rounded-lg ${theme.button.secondary}`}
               >
                 Today
@@ -141,17 +137,35 @@ function HabitTrackerContent() {
           </div>
         </div>
 
-        <HabitList
+        {loading ? (
-          habits={getSortedHabits()}
+          <div className="flex justify-center items-center py-8">
-          currentWeek={currentWeek}
+            <div className="animate-spin rounded-full h-8 w-8 border-b-2 border-gray-900 dark:border-white"></div>
-          daysOfWeek={DAYS_OF_WEEK}
+          </div>
-          onToggleHabit={toggleHabit}
+        ) : error ? (
-          onUpdateHabit={updateHabit}
+          <div className="text-red-500 text-center py-4">
-          onDeleteHabit={deleteHabit}
+            {error}
-        />
+            <button
-        <p className={`text-sm ${theme.mutedText} mt-4`}>
+              onClick={fetchHabits}
-          Keep up the good work! Consistency is key.
+              className="ml-2 text-blue-500 hover:underline"
-        </p>
+            >
+              Retry
+            </button>
+          </div>
+        ) : (
+          <>
+            <HabitList
+              habits={getSortedHabits()}
+              currentWeek={currentWeek}
+              daysOfWeek={DAYS_OF_WEEK}
+              onToggleHabit={toggleHabit}
+              onUpdateHabit={updateHabit}
+              onDeleteHabit={deleteHabit}
+            />
+            <p className={`text-sm ${theme.mutedText} mt-4`}>
+              Keep up the good work! Consistency is key.
+            </p>
+          </>
+        )}
       </div>
     </div>
   );

src/components/HabitList.tsx

@@ -3,15 +3,15 @@ import { Trash2 } from 'lucide-react';
 import { Habit } from '../types';
 import { useThemeContext } from '../contexts/ThemeContext';
 import { calculateStreak } from '../utils/streakCalculator';
+import { getDayIndex } from '../utils/dateUtils';
 
 interface HabitListProps {
   habits: Habit[];
   currentWeek: string[];
   daysOfWeek: string[];
-  onToggleHabit: (id: number, date: string) => void;
+  onToggleHabit: (id: number, date: string) => Promise<void>;
-  onUpdateHabit: (id: number, name: string) => void;
+  onUpdateHabit: (id: number, name: string) => Promise<void>;
-  onDeleteHabit: (id: number) => void;
+  onDeleteHabit: (id: number) => Promise<void>;
-  onUpdateStreak?: (id: number, newStreak: number) => Promise<void>;
 }
 
 export function HabitList({
@@ -22,21 +22,18 @@ export function HabitList({
   onUpdateHabit,
   onDeleteHabit,
 }: HabitListProps) {
-  const { habitSort, showStreaks } = useThemeContext();
+  const { theme, habitSort, showStreaks } = useThemeContext();
 
   const sortedHabits = useMemo(() => {
     if (habitSort === 'alphabetical') {
       return [...habits].sort((a, b) => a.name.localeCompare(b.name));
     }
-    // Default to dateCreated sort
     return habits;
   }, [habits, habitSort]);
 
-  // Helper function to get day name
   const getDayName = (dateStr: string) => {
     const date = new Date(dateStr);
-    const dayIndex = date.getDay() === 0 ? 6 : date.getDay() - 1;
+    return daysOfWeek[getDayIndex(date)];
-    return daysOfWeek[dayIndex];
   };
 
   return (
@@ -45,84 +42,88 @@ export function HabitList({
         <thead>
           <tr>
             <th className="text-left px-4 py-2 dark:text-white">Habit</th>
-            {currentWeek.map((dateStr) => {
+            {currentWeek.map((dateStr) => (
-              const date = new Date(dateStr);
+              <th key={dateStr} className="px-4 py-2 text-center dark:text-white">
-              return (
+                <div className="hidden md:block">{getDayName(dateStr)}</div>
-                <th key={dateStr} className="px-4 py-2 text-center dark:text-white">
+                <div className="md:hidden">{getDayName(dateStr).slice(0, 1)}</div>
-                  <div className="hidden md:block">{getDayName(dateStr)}</div>
+                <div className="text-xs text-gray-500 dark:text-gray-400">
-                  <div className="md:hidden">{getDayName(dateStr).slice(0, 1)}</div>
+                  {new Date(dateStr).getDate()}
-                  <div className="text-xs text-gray-500 dark:text-gray-400">
+                </div>
-                    {date.getDate()}
+              </th>
-                  </div>
+            ))}
-                </th>
+            {showStreaks && (
-              );
+              <th className="px-4 py-2 text-center dark:text-white">Streak</th>
-            })}
+            )}
             <th className="px-4 py-2 text-center dark:text-white">Actions</th>
           </tr>
         </thead>
         <tbody>
-          {sortedHabits.map((habit) => (
+          {sortedHabits.map((habit) => {
-            <tr key={habit.id} className="border-t dark:border-gray-700">
+            const { currentStreak } = calculateStreak(habit.completedDates);
-              <td className="px-4 py-2 dark:text-white">
+            
-                <input
+            return (
-                  type="text"
+              <tr key={habit.id} className="border-t dark:border-gray-700">
-                  value={habit.name}
+                <td className="px-4 py-2 dark:text-white">
-                  onChange={(e) => onUpdateHabit(habit.id, e.target.value)}
+                  <input
-                  className="bg-transparent border-none focus:outline-none focus:ring-2 focus:ring-gray-300 rounded px-2 w-full"
+                    type="text"
-                />
+                    value={habit.name}
-              </td>
+                    onChange={(e) => onUpdateHabit(habit.id, e.target.value)}
-              {currentWeek.map((date) => (
+                    className="bg-transparent border-none focus:outline-none focus:ring-2 focus:ring-gray-300 rounded px-2 w-full"
-                <td key={date} className="px-4 py-2 text-center">
+                  />
-                  <label className="relative inline-block cursor-pointer">
-                    <input
-                      type="checkbox"
-                      checked={habit.completedDates.includes(date)}
-                      onChange={() => onToggleHabit(habit.id, date)}
-                      className="sr-only"
-                    />
-                    <div
-                      className={`
-                        w-6 h-6 rounded-md border-2 transition-all duration-200
-                        ${habit.completedDates.includes(date)
-                          ? 'bg-green-500 border-green-500'
-                          : 'border-gray-300 dark:border-gray-600 hover:border-green-400 dark:hover:border-green-400'}
-                        flex items-center justify-center
-                      `}
-                    >
-                      {habit.completedDates.includes(date) && (
-                        <svg
-                          className="w-4 h-4 text-white"
-                          fill="none"
-                          strokeLinecap="round"
-                          strokeLinejoin="round"
-                          strokeWidth="2"
-                          viewBox="0 0 24 24"
-                          stroke="currentColor"
-                        >
-                          <path d="M5 13l4 4L19 7"></path>
-                        </svg>
-                      )}
-                    </div>
-                  </label>
                 </td>
-              ))}
+                {currentWeek.map((date) => (
-              <td className="px-4 py-2 text-center">
+                  <td key={date} className="px-4 py-2 text-center">
-                <button
+                    <label className="relative inline-block cursor-pointer">
-                  onClick={() => onDeleteHabit(habit.id)}
+                      <input
-                  className="p-2 text-red-500 hover:bg-red-100 dark:hover:bg-red-900 rounded-full transition-colors duration-200"
+                        type="checkbox"
-                >
+                        checked={habit.completedDates.includes(date)}
-                  <Trash2 className="h-4 w-4" />
+                        onChange={() => onToggleHabit(habit.id, date)}
-                </button>
+                        className="sr-only"
-              </td>
+                      />
-              {showStreaks && (
+                      <div
-                <>
+                        className={`
-                  <td className="px-4 py-2 text-center">
+                          w-6 h-6 rounded-md border-2 transition-all duration-200
-                    {/* ... streak content ... */}
+                          ${habit.completedDates.includes(date)
+                            ? 'bg-green-500 border-green-500'
+                            : 'border-gray-300 dark:border-gray-600 hover:border-green-400 dark:hover:border-green-400'}
+                          flex items-center justify-center
+                        `}
+                      >
+                        {habit.completedDates.includes(date) && (
+                          <svg
+                            className="w-4 h-4 text-white"
+                            fill="none"
+                            strokeLinecap="round"
+                            strokeLinejoin="round"
+                            strokeWidth="2"
+                            viewBox="0 0 24 24"
+                            stroke="currentColor"
+                          >
+                            <path d="M5 13l4 4L19 7"></path>
+                          </svg>
+                        )}
+                      </div>
+                    </label>
                   </td>
-                </>
+                ))}
-              )}
+                {showStreaks && (
-            </tr>
+                  <td className="px-4 py-2 text-center dark:text-white">
-          ))}
+                    <span className="inline-flex items-center px-2.5 py-0.5 rounded-full text-xs font-medium bg-green-100 text-green-800 dark:bg-green-800 dark:text-green-100">
+                      {currentStreak} days
+                    </span>
+                  </td>
+                )}
+                <td className="px-4 py-2 text-center">
+                  <button
+                    onClick={() => onDeleteHabit(habit.id)}
+                    className="p-2 text-red-500 hover:bg-red-100 dark:hover:bg-red-900 rounded-full transition-colors duration-200"
+                  >
+                    <Trash2 className="h-4 w-4" />
+                  </button>
+                </td>
+              </tr>
+            );
+          })}
         </tbody>
       </table>
     </div>

src/hooks/useHabits.ts

@@ -3,27 +3,34 @@ import { supabase } from '../lib/supabase';
 import { Habit } from '../types';
 import { calculateStreak } from '../utils/streakCalculator';
 import { useAuth } from '../contexts/AuthContext';
+import { formatDate } from '../utils/dateUtils';
 
 export const useHabits = () => {
   const [habits, setHabits] = useState<Habit[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
   const { user } = useAuth();
 
-  // Automatically fetch habits when user changes
   useEffect(() => {
     if (user) {
       fetchHabits();
     } else {
-      setHabits([]); // Clear habits when user logs out
+      setHabits([]);
+      setLoading(false);
     }
-  }, [user?.id]); // Depend on user.id to prevent unnecessary rerenders
+  }, [user?.id]);
 
   const fetchHabits = async () => {
     if (!user) {
       setHabits([]);
+      setLoading(false);
       return;
     }
     
     try {
+      setLoading(true);
+      setError(null);
+      
       const { data, error } = await supabase
         .from('habits')
         .select(`
@@ -40,7 +47,7 @@ export const useHabits = () => {
 
       if (error) throw error;
 
-      const formattedHabits = (data || []).map(habit => ({
+      const formattedHabits = data.map(habit => ({
         id: habit.id,
         name: habit.name,
         created_at: habit.created_at,
@@ -51,157 +58,144 @@ export const useHabits = () => {
       }));
 
       setHabits(formattedHabits);
-    } catch (error) {
+    } catch (err) {
-      console.error('Error fetching habits:', error);
+      console.error('Error fetching habits:', err);
-      setHabits([]);
+      setError(err instanceof Error ? err.message : 'Failed to fetch habits');
+    } finally {
+      setLoading(false);
     }
   };
 
-  const addHabit = async (name: string) => {
+  const addHabit = async (name: string): Promise<boolean> => {
-    if (!user) return false;
+    if (!user || !name.trim()) return false;
     
     try {
       const { data, error } = await supabase
         .from('habits')
         .insert([{ 
-          name, 
+          name: name.trim(), 
-          best_streak: 0,
+          user_id: user.id,
           created_at: new Date().toISOString(),
-          user_id: user.id
+          best_streak: 0
         }])
-        .select('id')
+        .select()
         .single();
 
       if (error) throw error;
 
       await fetchHabits();
       return true;
-    } catch (error) {
+    } catch (err) {
-      console.error('Error adding habit:', error);
+      console.error('Error adding habit:', err);
+      setError(err instanceof Error ? err.message : 'Failed to add habit');
       return false;
     }
   };
 
-  const toggleHabit = async (id: number, date: string) => {
+  const toggleHabit = async (id: number, date: string): Promise<void> => {
     if (!user) return;
     
     try {
-      // First verify this habit belongs to the user
+      const isCompleted = habits
-      const { data: habitData, error: habitError } = await supabase
+        .find(h => h.id === id)
-        .from('habits')
+        ?.completedDates.includes(date);
-        .select('id')
-        .eq('id', id)
-        .eq('user_id', user.id)
-        .single();
 
-      if (habitError || !habitData) {
+      if (isCompleted) {
-        throw new Error('Unauthorized access to habit');
+        // Remove completion
-      }
+        const { error } = await supabase
-
-      // Keep the original date string without any timezone conversion
-      const formattedDate = date;
-
-      console.log('Toggling habit:', { id, date, formattedDate });
-
-      // Check for existing completion
-      const { data: existing, error: existingError } = await supabase
-        .from('habit_completions')
-        .select('*')
-        .eq('habit_id', id)
-        .eq('completion_date', formattedDate)
-        .eq('user_id', user.id)
-        .single();
-
-      if (existingError && existingError.code !== 'PGRST116') {
-        throw existingError;
-      }
-
-      if (existing) {
-        const { error: deleteError } = await supabase
           .from('habit_completions')
           .delete()
           .eq('habit_id', id)
-          .eq('completion_date', formattedDate)
+          .eq('completion_date', date);
-          .eq('user_id', user.id);
 
-        if (deleteError) throw deleteError;
+        if (error) throw error;
       } else {
-        const { error: insertError } = await supabase
+        // Add completion
+        const { error } = await supabase
           .from('habit_completions')
-          .insert([{ 
+          .insert({
             habit_id: id,
-            completion_date: formattedDate,
+            completion_date: date,
             user_id: user.id
-          }]);
+          });
 
-        if (insertError) throw insertError;
+        if (error) throw error;
       }
 
+      // Update local state optimistically
+      setHabits(prevHabits =>
+        prevHabits.map(h => {
+          if (h.id !== id) return h;
+          return {
+            ...h,
+            completedDates: isCompleted
+              ? h.completedDates.filter(d => d !== date)
+              : [...h.completedDates, date]
+          };
+        })
+      );
+
+      // Fetch updated data to ensure consistency
+      await fetchHabits();
+    } catch (err) {
+      console.error('Error toggling habit:', err);
+      setError(err instanceof Error ? err.message : 'Failed to toggle habit');
       await fetchHabits();
-    } catch (error) {
-      console.error('Error toggling habit:', error);
-      throw error;
     }
   };
 
-  const updateHabit = async (id: number, name: string) => {
+  const updateHabit = async (id: number, name: string): Promise<void> => {
-    if (!user) return;
+    if (!user || !name.trim()) return;
     
     try {
-      // First verify this habit belongs to the user
+      const { error } = await supabase
-      const { data: habitData, error: habitError } = await supabase
         .from('habits')
-        .select('id')
+        .update({ name: name.trim() })
-        .eq('id', id)
-        .eq('user_id', user.id)
-        .single();
-
-      if (habitError || !habitData) {
-        throw new Error('Unauthorized access to habit');
-      }
-
-      await supabase
-        .from('habits')
-        .update({ name })
         .eq('id', id)
         .eq('user_id', user.id);
 
+      if (error) throw error;
+
+      // Update local state optimistically
+      setHabits(prevHabits =>
+        prevHabits.map(h =>
+          h.id === id ? { ...h, name: name.trim() } : h
+        )
+      );
+    } catch (err) {
+      console.error('Error updating habit:', err);
+      setError(err instanceof Error ? err.message : 'Failed to update habit');
+      // Revert optimistic update on error
       await fetchHabits();
-    } catch (error) {
-      console.error('Error updating habit:', error);
     }
   };
 
-  const deleteHabit = async (id: number) => {
+  const deleteHabit = async (id: number): Promise<void> => {
     if (!user) return;
     
     try {
-      // First verify this habit belongs to the user
+      const { error } = await supabase
-      const { data: habitData, error: habitError } = await supabase
-        .from('habits')
-        .select('id')
-        .eq('id', id)
-        .eq('user_id', user.id)
-        .single();
-
-      if (habitError || !habitData) {
-        throw new Error('Unauthorized access to habit');
-      }
-
-      await supabase
         .from('habits')
         .delete()
         .eq('id', id)
         .eq('user_id', user.id);
 
+      if (error) throw error;
+
+      // Update local state optimistically
+      setHabits(prevHabits => prevHabits.filter(h => h.id !== id));
+    } catch (err) {
+      console.error('Error deleting habit:', err);
+      setError(err instanceof Error ? err.message : 'Failed to delete habit');
+      // Revert optimistic update on error
       await fetchHabits();
-    } catch (error) {
-      console.error('Error deleting habit:', error);
     }
   };
 
   return {
     habits,
+    loading,
+    error,
     fetchHabits,
     addHabit,
     toggleHabit,

src/hooks/useWeek.ts

@@ -1,43 +1,17 @@
 import { useState } from 'react';
+import { getWeekDates, formatDate } from '../utils/dateUtils';
 
 export const useWeek = () => {
-  const [currentWeek, setCurrentWeek] = useState<string[]>([]);
+  const [currentWeek, setCurrentWeek] = useState<string[]>(getWeekDates());
 
-  const getCurrentWeekDates = () => {
+  const getCurrentWeekDates = () => getWeekDates();
-    const now = new Date();
-    const currentDay = now.getDay();
-    const diff = currentDay === 0 ? -6 : 1 - currentDay;
-    
-    const monday = new Date(now);
-    monday.setDate(now.getDate() + diff);
-    monday.setHours(0, 0, 0, 0);
-    
-    return Array.from({ length: 7 }, (_, i) => {
-      const date = new Date(monday);
-      date.setDate(monday.getDate() + i);
-      const year = date.getFullYear();
-      const month = String(date.getMonth() + 1).padStart(2, '0');
-      const day = String(date.getDate()).padStart(2, '0');
-      return `${year}-${month}-${day}`;
-    });
-  };
 
   const changeWeek = (direction: 'prev' | 'next') => {
-    if (currentWeek.length === 0) return;
+    setCurrentWeek(prevWeek => {
-    
+      const firstDay = new Date(prevWeek[0]);
-    const firstDay = new Date(currentWeek[0]);
+      firstDay.setDate(firstDay.getDate() + (direction === 'prev' ? -7 : 7));
-    firstDay.setHours(0, 0, 0, 0);
+      return getWeekDates(firstDay);
-    const newFirstDay = new Date(firstDay);
+    });
-    newFirstDay.setDate(firstDay.getDate() + (direction === 'prev' ? -7 : 7));
-    
-    setCurrentWeek(Array.from({ length: 7 }, (_, i) => {
-      const date = new Date(newFirstDay);
-      date.setDate(newFirstDay.getDate() + i);
-      const year = date.getFullYear();
-      const month = String(date.getMonth() + 1).padStart(2, '0');
-      const day = String(date.getDate()).padStart(2, '0');
-      return `${year}-${month}-${day}`;
-    }));
   };
 
   return {

src/utils/dateUtils.ts

@@ -0,0 +1,47 @@
+// Simple date formatting without timezone complications
+export const formatDate = (date: Date): string => {
+    const year = date.getFullYear();
+    const month = String(date.getMonth() + 1).padStart(2, '0');
+    const day = String(date.getDate()).padStart(2, '0');
+    return `${year}-${month}-${day}`;
+  };
+  
+  // Get day index (0-6) where Monday is 0 and Sunday is 6
+  export const getDayIndex = (date: Date): number => {
+    const day = date.getDay();
+    return day === 0 ? 6 : day - 1;
+  };
+  
+  // Get dates for current week starting from Monday
+  export const getWeekDates = (baseDate: Date = new Date()): string[] => {
+    const current = new Date(baseDate);
+    const dayIndex = getDayIndex(current);
+    
+    // Adjust to Monday
+    current.setDate(current.getDate() - dayIndex);
+    
+    // Generate dates starting from Monday
+    const dates = [];
+    for (let i = 0; i < 7; i++) {
+      const date = new Date(current);
+      date.setDate(current.getDate() + i);
+      dates.push(formatDate(date));
+    }
+    
+    return dates;
+  };
+  
+  // Get the first day of the month adjusted for Monday start
+  export const getFirstDayOfMonth = (year: number, month: number): number => {
+    const date = new Date(year, month, 1);
+    return getDayIndex(date);
+  };
+  
+  // Check if two dates are the same day
+  export const isSameDay = (date1: Date, date2: Date): boolean => {
+    return (
+      date1.getDate() === date2.getDate() &&
+      date1.getMonth() === date2.getMonth() &&
+      date1.getFullYear() === date2.getFullYear()
+    );
+  };