Further CSV Import method added

lib/edl-utils.ts

@@ -184,3 +184,80 @@ export function parsePictureTrackerCsv(
 
   return { rows, errors };
 }
+
+// ── Simple Shot CSV ──────────────────────────────────────────────────────────
+
+export interface SimpleCsvRow {
+  shotCode: string;
+  seqTimecodeStart: string;
+  seqTimecodeEnd: string;
+  description: string;
+  action: "create" | "update" | "skip";
+}
+
+/**
+ * Parse a simple shot CSV: Shot Name, Time Code In, Time Code Out, Description.
+ * Column names are matched case-insensitively with common aliases.
+ * Timecodes are validated but not required.
+ */
+export function parseSimpleCsv(
+  csvText: string,
+  existingCodes: Set<string>
+): { rows: SimpleCsvRow[]; errors: string[] } {
+  const lines = csvText.split(/\r?\n/).map((l) => l.trim()).filter(Boolean);
+  if (lines.length < 2) {
+    return { rows: [], errors: ["CSV must have a header row and at least one data row"] };
+  }
+
+  const rawHeaders = parseCsvLine(lines[0]).map((h) => h.toLowerCase().trim());
+  const col = (names: string[]) => {
+    for (const name of names) {
+      const idx = rawHeaders.indexOf(name);
+      if (idx !== -1) return idx;
+    }
+    return -1;
+  };
+
+  const shotNameIdx = col(["shot name", "shot code", "shotcode", "shot", "name"]);
+  const tcInIdx     = col(["time code in", "timecode in", "tc in", "tcin", "timecode start", "tc start"]);
+  const tcOutIdx    = col(["time code out", "timecode out", "tc out", "tcout", "timecode end", "tc end"]);
+  const descIdx     = col(["description", "desc", "notes", "note"]);
+
+  if (shotNameIdx === -1) {
+    return { rows: [], errors: ['CSV must contain a "Shot Name" (or "Shot Code") column'] };
+  }
+
+  const rows: SimpleCsvRow[] = [];
+  const errors: string[] = [];
+
+  for (let i = 1; i < lines.length; i++) {
+    const cells = parseCsvLine(lines[i]);
+    const get = (idx: number) =>
+      idx !== -1 && idx < cells.length ? (cells[idx] ?? "").trim() : "";
+
+    const shotCode = get(shotNameIdx);
+    if (!shotCode) { errors.push(`Row ${i + 1}: empty Shot Name — skipped`); continue; }
+
+    const tcIn  = get(tcInIdx);
+    const tcOut = get(tcOutIdx);
+
+    if (tcIn && !isValidTimecode(tcIn)) {
+      errors.push(`Row ${i + 1} (${shotCode}): invalid TC In "${tcIn}" — skipped`);
+      continue;
+    }
+    if (tcOut && !isValidTimecode(tcOut)) {
+      errors.push(`Row ${i + 1} (${shotCode}): invalid TC Out "${tcOut}" — skipped`);
+      continue;
+    }
+
+    rows.push({
+      shotCode,
+      seqTimecodeStart: tcIn,
+      seqTimecodeEnd:   tcOut,
+      description:      get(descIdx),
+      action: existingCodes.has(shotCode) ? "update" : "create",
+    });
+  }
+
+  return { rows, errors };
+}