feat: Implement DeepSeek integration, refactor model adapters for streaming and tool calls, enhance admin and account management, and introduce new UI features for settings, API testing, and Vercel sync.

api/chat-stream/toolcall_policy.js

@@ -0,0 +1,107 @@
+'use strict';
+
+const crypto = require('crypto');
+
+const {
+  extractToolNames,
+} = require('../helpers/stream-tool-sieve');
+
+function resolveToolcallPolicy(prepBody, payloadTools) {
+  const preparedToolNames = normalizePreparedToolNames(prepBody && prepBody.tool_names);
+  const toolNames = preparedToolNames.length > 0 ? preparedToolNames : extractToolNames(payloadTools);
+  const featureMatchEnabled = boolDefaultTrue(prepBody && prepBody.toolcall_feature_match);
+  const emitEarlyToolDeltas = boolDefaultTrue(prepBody && prepBody.toolcall_early_emit_high);
+  return {
+    toolNames,
+    toolSieveEnabled: toolNames.length > 0 && featureMatchEnabled,
+    emitEarlyToolDeltas,
+  };
+}
+
+function normalizePreparedToolNames(v) {
+  if (!Array.isArray(v) || v.length === 0) {
+    return [];
+  }
+  const out = [];
+  for (const item of v) {
+    const name = asString(item);
+    if (!name) {
+      continue;
+    }
+    out.push(name);
+  }
+  return out;
+}
+
+function boolDefaultTrue(v) {
+  return v !== false;
+}
+
+function formatIncrementalToolCallDeltas(deltas, idStore) {
+  if (!Array.isArray(deltas) || deltas.length === 0) {
+    return [];
+  }
+  const out = [];
+  for (const d of deltas) {
+    if (!d || typeof d !== 'object') {
+      continue;
+    }
+    const index = Number.isInteger(d.index) ? d.index : 0;
+    const id = ensureStreamToolCallID(idStore, index);
+    const item = {
+      index,
+      id,
+      type: 'function',
+    };
+    const fn = {};
+    if (asString(d.name)) {
+      fn.name = asString(d.name);
+    }
+    if (typeof d.arguments === 'string' && d.arguments !== '') {
+      fn.arguments = d.arguments;
+    }
+    if (Object.keys(fn).length > 0) {
+      item.function = fn;
+    }
+    out.push(item);
+  }
+  return out;
+}
+
+function ensureStreamToolCallID(idStore, index) {
+  const key = Number.isInteger(index) ? index : 0;
+  const existing = idStore.get(key);
+  if (existing) {
+    return existing;
+  }
+  const next = `call_${newCallID()}`;
+  idStore.set(key, next);
+  return next;
+}
+
+function newCallID() {
+  if (typeof crypto.randomUUID === 'function') {
+    return crypto.randomUUID().replace(/-/g, '');
+  }
+  return `${Date.now()}${Math.floor(Math.random() * 1e9)}`;
+}
+
+function asString(v) {
+  if (typeof v === 'string') {
+    return v.trim();
+  }
+  if (Array.isArray(v)) {
+    return asString(v[0]);
+  }
+  if (v == null) {
+    return '';
+  }
+  return String(v).trim();
+}
+
+module.exports = {
+  resolveToolcallPolicy,
+  normalizePreparedToolNames,
+  boolDefaultTrue,
+  formatIncrementalToolCallDeltas,
+};