Opussy bug fix

src/utils/responseExtractor.js

@@ -0,0 +1,122 @@
+/**
+ * Response Extractor Utility
+ *
+ * Handles extraction of text content from various API response formats.
+ * Fixes the "No message generated" error caused by Claude models with
+ * extended thinking, where the API response `content` field is an array
+ * of content blocks instead of a single string.
+ *
+ * Also provides a safe wrapper around SillyTavern's `generateRaw` that
+ * intercepts the raw fetch response as a fallback.
+ */
+
+import { generateRaw } from '../../../../../../../script.js';
+
+/**
+ * Extracts text from any API response shape (Anthropic content-block arrays,
+ * OpenAI choices, plain strings, etc.).
+ *
+ * @param {*} response - The raw API response (string, array, or object)
+ * @returns {string} The extracted text content
+ */
+export function extractTextFromResponse(response) {
+    if (!response) return '';
+    if (typeof response === 'string') return response;
+
+    // Response itself is an array of content blocks (Anthropic extended thinking)
+    if (Array.isArray(response)) {
+        const texts = response
+            .filter(b => b && b.type === 'text' && typeof b.text === 'string')
+            .map(b => b.text);
+        if (texts.length > 0) return texts.join('\n');
+
+        const strings = response.filter(item => typeof item === 'string');
+        if (strings.length > 0) return strings.join('\n');
+
+        return JSON.stringify(response);
+    }
+
+    // response.content (string or Anthropic content array)
+    if (response.content !== undefined && response.content !== null) {
+        if (typeof response.content === 'string') return response.content;
+        if (Array.isArray(response.content)) {
+            const texts = response.content
+                .filter(b => b && b.type === 'text' && typeof b.text === 'string')
+                .map(b => b.text);
+            if (texts.length > 0) return texts.join('\n');
+        }
+    }
+
+    // OpenAI choices format
+    if (response.choices?.[0]?.message?.content) {
+        const c = response.choices[0].message.content;
+        if (typeof c === 'string') return c;
+        if (Array.isArray(c)) {
+            const texts = c
+                .filter(b => b && b.type === 'text' && typeof b.text === 'string')
+                .map(b => b.text);
+            if (texts.length > 0) return texts.join('\n');
+        }
+    }
+
+    // Other common fields
+    if (typeof response.text === 'string') return response.text;
+    if (typeof response.message === 'string') return response.message;
+    if (response.message?.content && typeof response.message.content === 'string') {
+        return response.message.content;
+    }
+
+    return JSON.stringify(response);
+}
+
+/**
+ * Safe wrapper around SillyTavern's `generateRaw`.
+ *
+ * Temporarily intercepts `window.fetch` to capture the raw API response.
+ * If `generateRaw` throws "No message generated" (e.g. because the first
+ * content block from Claude extended thinking is empty), we extract the
+ * real text from the captured raw data ourselves.
+ *
+ * @param {object} options - Options passed directly to `generateRaw`
+ * @param {Array<{role: string, content: string}>} options.prompt - Message array
+ * @param {boolean} [options.quietToLoud] - Whether to use quiet-to-loud mode
+ * @returns {Promise<string>} The generated text
+ */
+export async function safeGenerateRaw(options) {
+    let capturedRawData = null;
+    const originalFetch = window.fetch;
+
+    window.fetch = async function (...args) {
+        const response = await originalFetch.apply(this, args);
+        try {
+            const url = typeof args[0] === 'string' ? args[0] : args[0]?.url || '';
+            if (url.includes('/api/backends/chat-completions/generate') ||
+                (url.includes('/api/backends/') && url.includes('/generate'))) {
+                const clone = response.clone();
+                capturedRawData = await clone.json();
+            }
+        } catch (e) {
+            /* ignore clone/parse errors */
+        }
+        return response;
+    };
+
+    try {
+        const result = await generateRaw(options);
+        return result;
+    } catch (genErr) {
+        if (genErr.message?.includes('No message generated') && capturedRawData) {
+            console.warn(
+                '[RPG Companion] generateRaw failed (likely extended thinking). Extracting from raw API data.',
+            );
+            const extracted = extractTextFromResponse(capturedRawData);
+            if (!extracted || !extracted.trim()) {
+                throw new Error('Could not extract text from API response');
+            }
+            return extracted;
+        }
+        throw genErr; // Re-throw non-related errors
+    } finally {
+        window.fetch = originalFetch; // ALWAYS restore original fetch
+    }
+}