init

src/services/habitService.js

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+import { supabase } from './supabase';
+import * as offline from './offlineStorage';
+import { todayISO } from '../utils/date';
+
+// Must match authService.js
+const USE_OFFLINE = true;
+
+export async function getHabits(identityId) {
+  if (USE_OFFLINE) {
+    return offline.getAll('habits', { identity_id: identityId });
+  }
+
+  const { data, error } = await supabase
+    .from('habits')
+    .select('*')
+    .eq('identity_id', identityId);
+
+  if (error) throw error;
+  return data || [];
+}
+
+export async function getTodayHabitLogs(habitIds) {
+  if (!habitIds.length) return {};
+  const today = todayISO();
+
+  if (USE_OFFLINE) {
+    const allLogs = await offline.getAll('habit_logs');
+    const logs = {};
+    allLogs.forEach((log) => {
+      if (habitIds.includes(log.habit_id) && log.date === today) {
+        logs[log.habit_id] = log.completed;
+      }
+    });
+    return logs;
+  }
+
+  const { data, error } = await supabase
+    .from('habit_logs')
+    .select('*')
+    .in('habit_id', habitIds)
+    .eq('date', today);
+
+  if (error) throw error;
+
+  const logs = {};
+  (data || []).forEach((log) => {
+    logs[log.habit_id] = log.completed;
+  });
+  return logs;
+}
+
+export async function saveHabitLog(habitId, completed) {
+  const today = todayISO();
+
+  if (USE_OFFLINE) {
+    await offline.upsert(
+      'habit_logs',
+      { habit_id: habitId, date: today },
+      { completed }
+    );
+    return;
+  }
+
+  const { data: existing } = await supabase
+    .from('habit_logs')
+    .select('id')
+    .eq('habit_id', habitId)
+    .eq('date', today)
+    .maybeSingle();
+
+  if (existing) {
+    const { error } = await supabase
+      .from('habit_logs')
+      .update({ completed })
+      .eq('id', existing.id);
+    if (error) throw error;
+  } else {
+    const { error } = await supabase
+      .from('habit_logs')
+      .insert({ habit_id: habitId, date: today, completed });
+    if (error) throw error;
+  }
+}