feat: 初版

lib/knowledge.ts

@@ -0,0 +1,85 @@
+import { createClient } from "@/lib/supabase/client"
+import type { KnowledgeItem, KnowledgeItemInput, Mastery } from "@/lib/types"
+
+const TABLE = "knowledge_items"
+
+export async function fetchItems(): Promise<KnowledgeItem[]> {
+  const supabase = createClient()
+  const { data, error } = await supabase.from(TABLE).select("*").order("created_at", { ascending: false })
+  if (error) throw error
+  return (data ?? []) as KnowledgeItem[]
+}
+
+export async function createItem(input: KnowledgeItemInput): Promise<KnowledgeItem> {
+  const supabase = createClient()
+  const { data, error } = await supabase
+    .from(TABLE)
+    .insert({ ...input })
+    .select("*")
+    .single()
+  if (error) throw error
+  return data as KnowledgeItem
+}
+
+export async function createItems(inputs: KnowledgeItemInput[]): Promise<KnowledgeItem[]> {
+  const supabase = createClient()
+  const { data, error } = await supabase
+    .from(TABLE)
+    .insert(inputs.map((i) => ({ ...i })))
+    .select("*")
+  if (error) throw error
+  return (data ?? []) as KnowledgeItem[]
+}
+
+export async function updateItem(id: string, input: Partial<KnowledgeItemInput>): Promise<KnowledgeItem> {
+  const supabase = createClient()
+  const { data, error } = await supabase
+    .from(TABLE)
+    .update({ ...input, updated_at: new Date().toISOString() })
+    .eq("id", id)
+    .select("*")
+    .single()
+  if (error) throw error
+  return data as KnowledgeItem
+}
+
+export async function saveInterviewAnswer(id: string, answer: string): Promise<void> {
+  const supabase = createClient()
+  const { error } = await supabase
+    .from(TABLE)
+    .update({ interview_answer: answer, updated_at: new Date().toISOString() })
+    .eq("id", id)
+  if (error) throw error
+}
+
+export async function deleteItem(id: string): Promise<void> {
+  const supabase = createClient()
+  const { error } = await supabase.from(TABLE).delete().eq("id", id)
+  if (error) throw error
+}
+
+export async function toggleFavorite(id: string, value: boolean): Promise<void> {
+  const supabase = createClient()
+  const { error } = await supabase.from(TABLE).update({ is_favorite: value }).eq("id", id)
+  if (error) throw error
+}
+
+export async function reviewItem(id: string, currentCount: number, mastery: Mastery): Promise<KnowledgeItem> {
+  const supabase = createClient()
+  const now = new Date()
+  // simple spaced-repetition: schedule next review based on mastery
+  const daysAhead = mastery === "mastered" ? 14 : mastery === "learning" ? 4 : 1
+  const next = new Date(now.getTime() + daysAhead * 24 * 60 * 60 * 1000)
+  const { data, error } = await supabase
+    .from(TABLE)
+    .update({
+      review_count: currentCount + 1,
+      last_reviewed_at: now.toISOString(),
+      next_review_at: next.toISOString(),
+    })
+    .eq("id", id)
+    .select("*")
+    .single()
+  if (error) throw error
+  return data as KnowledgeItem
+}