ai fixes

apps/web/src/lib/teacher/extract-text.ts

@@ -0,0 +1,83 @@
+const OBJECT_OBJECT = "[object Object]";
+
+export function isObjectObject(value: string | undefined | null): boolean {
+  return value?.trim() === OBJECT_OBJECT;
+}
+
+/** Extract human-readable text from AI fields that may be strings or nested objects. */
+export function extractText(value: unknown): string {
+  if (value == null) return "";
+  if (typeof value === "string") {
+    const trimmed = value.trim();
+    return isObjectObject(trimmed) ? "" : trimmed;
+  }
+  if (typeof value === "number" || typeof value === "boolean") {
+    return String(value);
+  }
+  if (Array.isArray(value)) {
+    return value.map((item) => extractText(item)).filter(Boolean).join("; ");
+  }
+  if (typeof value === "object") {
+    const o = value as Record<string, unknown>;
+    const parts: string[] = [];
+    for (const key of ["task", "text", "description", "content", "summary", "goal", "step"]) {
+      const part = extractText(o[key]);
+      if (part) parts.push(part);
+    }
+    if (Array.isArray(o.steps)) {
+      const steps = o.steps.map((s) => extractText(s)).filter(Boolean);
+      if (steps.length) parts.push(steps.join("; "));
+    }
+    if (Array.isArray(o.instructions)) {
+      const instructions = o.instructions.map((s) => extractText(s)).filter(Boolean);
+      if (instructions.length) parts.push(instructions.join("; "));
+    }
+    return parts.join(" — ").trim();
+  }
+  return "";
+}
+
+export function extractStringList(value: unknown): string[] {
+  if (!Array.isArray(value)) return [];
+  return value.map((item) => extractText(item)).filter(Boolean);
+}
+
+export function normalizeQuizAnswer(
+  rawAnswer: unknown,
+  options: string[]
+): { answerIndex: number; answerText: string } {
+  if (options.length === 0) {
+    const text = extractText(rawAnswer);
+    return { answerIndex: 0, answerText: text || "See explanation" };
+  }
+
+  if (typeof rawAnswer === "number" && Number.isFinite(rawAnswer)) {
+    const idx = Math.min(Math.max(0, rawAnswer), options.length - 1);
+    return { answerIndex: idx, answerText: options[idx] ?? "" };
+  }
+
+  const asString = extractText(rawAnswer).trim();
+  if (!asString) return { answerIndex: 0, answerText: options[0] ?? "" };
+
+  const asNum = Number(asString);
+  if (Number.isFinite(asNum) && asNum >= 0 && asNum < options.length) {
+    return { answerIndex: asNum, answerText: options[asNum] ?? "" };
+  }
+
+  const letterMatch = /^[A-Da-d]$/.exec(asString);
+  if (letterMatch) {
+    const idx = letterMatch[0].toUpperCase().charCodeAt(0) - 65;
+    if (idx >= 0 && idx < options.length) {
+      return { answerIndex: idx, answerText: options[idx] ?? "" };
+    }
+  }
+
+  const optionIdx = options.findIndex(
+    (opt) => opt.toLowerCase() === asString.toLowerCase()
+  );
+  if (optionIdx >= 0) {
+    return { answerIndex: optionIdx, answerText: options[optionIdx] ?? "" };
+  }
+
+  return { answerIndex: 0, answerText: asString };
+}