Initial commit - modstagram-next

src/lib/chat/dedupeMessages.ts

@@ -0,0 +1,19 @@
+import type { ChatMessage } from "@/components/chat/ChatMessageCard";
+
+export function dedupeChatMessages(messages: ChatMessage[]): ChatMessage[] {
+  const seen = new Set<string>();
+  const result: ChatMessage[] = [];
+
+  for (const m of messages) {
+    if (!m) continue;
+    const idKey =
+      m._id && /^[a-f\d]{24}$/i.test(m._id)
+        ? m._id
+        : `${m.senderId}|${m.content}|${m.file}|${m.createdAt}`;
+    if (seen.has(idKey)) continue;
+    seen.add(idKey);
+    result.push(m);
+  }
+
+  return result;
+}

src/lib/chat/detectFileType.ts

@@ -0,0 +1,41 @@
+import type { ChatMessage } from "@/components/chat/ChatMessageCard";
+
+const IMAGE_EXT = ["jpg", "jpeg", "png", "webp", "gif", "avif"];
+const VIDEO_EXT = ["mp4", "webm", "mov", "m4v"];
+const VOICE_EXT = ["mp3", "wav", "aac", "m4a", "ogg", "opus", "webm"];
+const DOC_EXT = ["pdf", "zip", "rar", "doc", "docx", "xls", "xlsx", "txt"];
+
+/** Reliable media type — voice never shown as video */
+export function detectChatFileType(
+  fileUrl: string,
+  declared?: ChatMessage["fileType"]
+): ChatMessage["fileType"] | null {
+  if (declared === "location") return "location";
+  if (declared === "voice") return "voice";
+  if (!fileUrl) return declared ?? null;
+
+  const lower = fileUrl.toLowerCase();
+  const ext = lower.split(".").pop()?.split("?")[0] || "";
+
+  if (declared === "image" || IMAGE_EXT.includes(ext)) return "image";
+  if (declared === "voice") return "voice";
+  if (VOICE_EXT.includes(ext) && ext !== "webm") return "voice";
+  if (ext === "webm") {
+    if (
+      lower.includes("voice") ||
+      lower.includes("audio") ||
+      declared === "voice"
+    ) {
+      return "voice";
+    }
+    if (declared === "video" || lower.includes("video")) return "video";
+    return "voice";
+  }
+  if (declared === "video" || VIDEO_EXT.includes(ext)) return "video";
+  if (declared === "file" || DOC_EXT.includes(ext)) return "file";
+
+  if (IMAGE_EXT.includes(ext)) return "image";
+  if (["mp3", "wav", "aac", "m4a", "opus"].includes(ext)) return "voice";
+  if (VIDEO_EXT.includes(ext)) return "video";
+  return "file";
+}

src/lib/chat/formatMessageTime.ts

@@ -0,0 +1,36 @@
+/** Bubble time: hours, minutes, seconds only (no date) */
+export function formatBubbleTime(createdAt?: string | null): string {
+  if (!createdAt) {
+    return new Date().toLocaleTimeString("fa-IR", {
+      hour: "2-digit",
+      minute: "2-digit",
+      second: "2-digit",
+    });
+  }
+
+  const raw = String(createdAt).trim();
+
+  // Jalali datetime "1403-01-15 14:30:45" or ISO
+  const timePart = raw.includes(" ")
+    ? raw.split(" ").pop()
+    : raw.length <= 8 && raw.includes(":")
+      ? raw
+      : null;
+
+  if (timePart && /^\d{1,2}:\d{2}(:\d{2})?$/.test(timePart)) {
+    const parts = timePart.split(":");
+    if (parts.length === 2) return `${parts[0]}:${parts[1]}:00`;
+    return timePart;
+  }
+
+  const d = new Date(raw);
+  if (!Number.isNaN(d.getTime())) {
+    return d.toLocaleTimeString("fa-IR", {
+      hour: "2-digit",
+      minute: "2-digit",
+      second: "2-digit",
+    });
+  }
+
+  return raw;
+}

src/lib/chat/groupMessagesByDate.ts

@@ -0,0 +1,67 @@
+import type { ChatMessage } from "@/components/chat/ChatMessageCard";
+
+export type MessageGroup =
+  | { type: "date"; label: string; key: string }
+  | { type: "message"; message: ChatMessage; key: string };
+
+function normalizeDateInput(isoOrTime?: string | null): string {
+  if (isoOrTime == null || String(isoOrTime).trim() === "") {
+    return new Date().toISOString();
+  }
+  return String(isoOrTime);
+}
+
+function formatDateLabel(isoOrTime?: string | null): string {
+  const raw = normalizeDateInput(isoOrTime);
+  const d = new Date(raw);
+  if (!Number.isNaN(d.getTime())) {
+    const today = new Date();
+    const yesterday = new Date();
+    yesterday.setDate(today.getDate() - 1);
+    if (d.toDateString() === today.toDateString()) return "امروز";
+    if (d.toDateString() === yesterday.toDateString()) return "دیروز";
+    return d.toLocaleDateString("fa-IR", {
+      weekday: "long",
+      year: "numeric",
+      month: "long",
+      day: "numeric",
+    });
+  }
+  const fallback = raw.split(" ")[0];
+  return fallback || "امروز";
+}
+
+function dayKey(isoOrTime?: string | null): string {
+  const raw = normalizeDateInput(isoOrTime);
+  const d = new Date(raw);
+  if (!Number.isNaN(d.getTime())) {
+    return d.toDateString();
+  }
+  return raw.split(" ")[0] || "unknown-day";
+}
+
+export function groupMessagesByDate(messages: ChatMessage[]): MessageGroup[] {
+  const groups: MessageGroup[] = [];
+  let lastDay = "";
+
+  messages.forEach((msg, i) => {
+    if (!msg) return;
+
+    const dk = dayKey(msg.createdAt);
+    if (dk !== lastDay) {
+      lastDay = dk;
+      groups.push({
+        type: "date",
+        label: formatDateLabel(msg.createdAt),
+        key: `date-${dk}`,
+      });
+    }
+    groups.push({
+      type: "message",
+      message: msg,
+      key: msg._id || `m-${i}`,
+    });
+  });
+
+  return groups;
+}