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lib/journal-storage.ts

@@ -0,0 +1,110 @@
+import { createClient } from "@/lib/supabase/client";
+
+export type JournalEntry = {
+  entryDate: string;
+  content: string;
+};
+
+const LOCAL_STORAGE_KEY = "habit-pet-journal";
+
+export function getTodayDateKey(date = new Date()) {
+  return date.toISOString().slice(0, 10);
+}
+
+function getLocalJournalEntry(entryDate = getTodayDateKey()): JournalEntry | null {
+  if (typeof window === "undefined") {
+    return null;
+  }
+
+  const raw = window.localStorage.getItem(LOCAL_STORAGE_KEY);
+
+  if (!raw) {
+    return null;
+  }
+
+  try {
+    const entry = JSON.parse(raw) as JournalEntry;
+    return entry.entryDate === entryDate ? entry : null;
+  } catch {
+    return null;
+  }
+}
+
+function saveLocalJournalEntry(content: string, entryDate = getTodayDateKey()) {
+  const entry: JournalEntry = { entryDate, content };
+  window.localStorage.setItem(LOCAL_STORAGE_KEY, JSON.stringify(entry));
+  return entry;
+}
+
+export async function getJournalEntryForToday(): Promise<JournalEntry | null> {
+  const entryDate = getTodayDateKey();
+  const supabase = createClient();
+  const {
+    data: { user },
+  } = await supabase.auth.getUser();
+
+  if (!user) {
+    return getLocalJournalEntry(entryDate);
+  }
+
+  const { data, error } = await supabase
+    .from("journal_entries")
+    .select("entry_date, content")
+    .eq("user_id", user.id)
+    .eq("entry_date", entryDate)
+    .maybeSingle();
+
+  if (error) {
+    console.error("Failed to load journal entry:", error.message);
+    return getLocalJournalEntry(entryDate);
+  }
+
+  if (!data) {
+    return null;
+  }
+
+  return {
+    entryDate: data.entry_date,
+    content: data.content,
+  };
+}
+
+export async function saveJournalEntry(content: string): Promise<JournalEntry> {
+  const entryDate = getTodayDateKey();
+  const supabase = createClient();
+  const {
+    data: { user },
+  } = await supabase.auth.getUser();
+
+  if (!user) {
+    return saveLocalJournalEntry(content, entryDate);
+  }
+
+  const { data, error } = await supabase
+    .from("journal_entries")
+    .upsert(
+      {
+        user_id: user.id,
+        entry_date: entryDate,
+        content,
+        updated_at: new Date().toISOString(),
+      },
+      { onConflict: "user_id,entry_date" },
+    )
+    .select("entry_date, content")
+    .single();
+
+  if (error) {
+    console.error("Failed to save journal entry:", error.message);
+    return saveLocalJournalEntry(content, entryDate);
+  }
+
+  return {
+    entryDate: data.entry_date,
+    content: data.content,
+  };
+}
+
+export function hasJournalEntryToday(entry: JournalEntry | null) {
+  return entry?.entryDate === getTodayDateKey() && entry.content.trim().length > 0;
+}