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.

This commit is contained in:
CJACK
2026-02-22 17:25:48 +08:00
parent 5d3989a9a7
commit 6c48429b90
152 changed files with 13583 additions and 11817 deletions

View File

@@ -1,957 +1,3 @@
'use strict';
const crypto = require('crypto');
const TOOL_CALL_PATTERN = /\{\s*["']tool_calls["']\s*:\s*\[(.*?)\]\s*\}/s;
const TOOL_SIEVE_CAPTURE_LIMIT = 8 * 1024;
const TOOL_SIEVE_CONTEXT_TAIL_LIMIT = 256;
function extractToolNames(tools) {
if (!Array.isArray(tools) || tools.length === 0) {
return [];
}
const out = [];
for (const t of tools) {
if (!t || typeof t !== 'object') {
continue;
}
const fn = t.function && typeof t.function === 'object' ? t.function : t;
const name = toStringSafe(fn.name);
// Keep parity with Go injectToolPrompt: object tools without name still
// enter tool mode via fallback name "unknown".
out.push(name || 'unknown');
}
return out;
}
function createToolSieveState() {
return {
pending: '',
capture: '',
capturing: false,
recentTextTail: '',
toolNameSent: false,
toolName: '',
toolArgsStart: -1,
toolArgsSent: -1,
toolArgsString: false,
toolArgsDone: false,
};
}
function resetIncrementalToolState(state) {
state.toolNameSent = false;
state.toolName = '';
state.toolArgsStart = -1;
state.toolArgsSent = -1;
state.toolArgsString = false;
state.toolArgsDone = false;
}
function processToolSieveChunk(state, chunk, toolNames) {
if (!state) {
return [];
}
if (chunk) {
state.pending += chunk;
}
const events = [];
// eslint-disable-next-line no-constant-condition
while (true) {
if (state.capturing) {
if (state.pending) {
state.capture += state.pending;
state.pending = '';
}
const deltas = buildIncrementalToolDeltas(state);
if (deltas.length > 0) {
events.push({ type: 'tool_call_deltas', deltas });
}
const consumed = consumeToolCapture(state, toolNames);
if (!consumed.ready) {
if (state.capture.length > TOOL_SIEVE_CAPTURE_LIMIT) {
noteText(state, state.capture);
events.push({ type: 'text', text: state.capture });
state.capture = '';
state.capturing = false;
resetIncrementalToolState(state);
continue;
}
break;
}
state.capture = '';
state.capturing = false;
resetIncrementalToolState(state);
if (consumed.prefix) {
noteText(state, consumed.prefix);
events.push({ type: 'text', text: consumed.prefix });
}
if (Array.isArray(consumed.calls) && consumed.calls.length > 0) {
events.push({ type: 'tool_calls', calls: consumed.calls });
}
if (consumed.suffix) {
state.pending += consumed.suffix;
}
continue;
}
if (!state.pending) {
break;
}
const start = findToolSegmentStart(state.pending);
if (start >= 0) {
const prefix = state.pending.slice(0, start);
if (prefix) {
noteText(state, prefix);
events.push({ type: 'text', text: prefix });
}
state.capture = state.pending.slice(start);
state.pending = '';
state.capturing = true;
resetIncrementalToolState(state);
continue;
}
const [safe, hold] = splitSafeContentForToolDetection(state.pending);
if (!safe) {
break;
}
state.pending = hold;
noteText(state, safe);
events.push({ type: 'text', text: safe });
}
return events;
}
function flushToolSieve(state, toolNames) {
if (!state) {
return [];
}
const events = processToolSieveChunk(state, '', toolNames);
if (state.capturing) {
const consumed = consumeToolCapture(state, toolNames);
if (consumed.ready) {
if (consumed.prefix) {
noteText(state, consumed.prefix);
events.push({ type: 'text', text: consumed.prefix });
}
if (Array.isArray(consumed.calls) && consumed.calls.length > 0) {
events.push({ type: 'tool_calls', calls: consumed.calls });
}
if (consumed.suffix) {
noteText(state, consumed.suffix);
events.push({ type: 'text', text: consumed.suffix });
}
} else if (state.capture) {
noteText(state, state.capture);
events.push({ type: 'text', text: state.capture });
}
state.capture = '';
state.capturing = false;
resetIncrementalToolState(state);
}
if (state.pending) {
noteText(state, state.pending);
events.push({ type: 'text', text: state.pending });
state.pending = '';
}
return events;
}
function splitSafeContentForToolDetection(s) {
const text = s || '';
if (!text) {
return ['', ''];
}
const suspiciousStart = findSuspiciousPrefixStart(text);
if (suspiciousStart < 0) {
return [text, ''];
}
if (suspiciousStart > 0) {
return [text.slice(0, suspiciousStart), text.slice(suspiciousStart)];
}
// If suspicious content starts at the beginning, keep holding until we can
// either parse a full tool JSON block or reach stream flush.
return ['', text];
}
function findSuspiciousPrefixStart(s) {
let start = -1;
for (const needle of ['{', '[', '```']) {
const idx = s.lastIndexOf(needle);
if (idx > start) {
start = idx;
}
}
return start;
}
function findToolSegmentStart(s) {
if (!s) {
return -1;
}
const lower = s.toLowerCase();
let offset = 0;
// eslint-disable-next-line no-constant-condition
while (true) {
const keyRel = lower.indexOf('tool_calls', offset);
if (keyRel < 0) {
return -1;
}
const keyIdx = keyRel;
const start = s.slice(0, keyIdx).lastIndexOf('{');
const candidateStart = start >= 0 ? start : keyIdx;
if (!insideCodeFence(s.slice(0, candidateStart))) {
return candidateStart;
}
offset = keyIdx + 'tool_calls'.length;
}
}
function consumeToolCapture(state, toolNames) {
const captured = state.capture;
if (!captured) {
return { ready: false, prefix: '', calls: [], suffix: '' };
}
const lower = captured.toLowerCase();
const keyIdx = lower.indexOf('tool_calls');
if (keyIdx < 0) {
return { ready: false, prefix: '', calls: [], suffix: '' };
}
const start = captured.slice(0, keyIdx).lastIndexOf('{');
if (start < 0) {
return { ready: false, prefix: '', calls: [], suffix: '' };
}
const obj = extractJSONObjectFrom(captured, start);
if (!obj.ok) {
return { ready: false, prefix: '', calls: [], suffix: '' };
}
const prefixPart = captured.slice(0, start);
const suffixPart = captured.slice(obj.end);
if (insideCodeFence((state.recentTextTail || '') + prefixPart)) {
return {
ready: true,
prefix: captured,
calls: [],
suffix: '',
};
}
const parsed = parseStandaloneToolCalls(captured.slice(start, obj.end), toolNames);
if (parsed.length === 0) {
if (state.toolNameSent) {
return {
ready: true,
prefix: prefixPart,
calls: [],
suffix: suffixPart,
};
}
return {
ready: true,
prefix: captured,
calls: [],
suffix: '',
};
}
if (state.toolNameSent) {
if (parsed.length > 1) {
return {
ready: true,
prefix: prefixPart,
calls: parsed.slice(1),
suffix: suffixPart,
};
}
return {
ready: true,
prefix: prefixPart,
calls: [],
suffix: suffixPart,
};
}
return {
ready: true,
prefix: prefixPart,
calls: parsed,
suffix: suffixPart,
};
}
function buildIncrementalToolDeltas(state) {
const captured = state.capture || '';
if (!captured) {
return [];
}
if (looksLikeToolExampleContext(state.recentTextTail)) {
return [];
}
const lower = captured.toLowerCase();
const keyIdx = lower.indexOf('tool_calls');
if (keyIdx < 0) {
return [];
}
const start = captured.slice(0, keyIdx).lastIndexOf('{');
if (start < 0) {
return [];
}
if (insideCodeFence((state.recentTextTail || '') + captured.slice(0, start))) {
return [];
}
const callStart = findFirstToolCallObjectStart(captured, keyIdx);
if (callStart < 0) {
return [];
}
const deltas = [];
if (!state.toolName) {
const name = extractToolCallName(captured, callStart);
if (!name) {
return [];
}
state.toolName = name;
}
if (state.toolArgsStart < 0) {
const args = findToolCallArgsStart(captured, callStart);
if (args) {
state.toolArgsString = Boolean(args.stringMode);
state.toolArgsStart = state.toolArgsString ? args.start + 1 : args.start;
state.toolArgsSent = state.toolArgsStart;
}
}
if (!state.toolNameSent) {
if (state.toolArgsStart < 0) {
return [];
}
state.toolNameSent = true;
deltas.push({ index: 0, name: state.toolName });
}
if (state.toolArgsStart < 0 || state.toolArgsDone) {
return deltas;
}
const progress = scanToolCallArgsProgress(captured, state.toolArgsStart, state.toolArgsString);
if (!progress) {
return deltas;
}
if (progress.end > state.toolArgsSent) {
deltas.push({
index: 0,
arguments: captured.slice(state.toolArgsSent, progress.end),
});
state.toolArgsSent = progress.end;
}
if (progress.complete) {
state.toolArgsDone = true;
}
return deltas;
}
function findFirstToolCallObjectStart(text, keyIdx) {
const arrStart = findToolCallsArrayStart(text, keyIdx);
if (arrStart < 0) {
return -1;
}
const i = skipSpaces(text, arrStart + 1);
if (i >= text.length || text[i] !== '{') {
return -1;
}
return i;
}
function findToolCallsArrayStart(text, keyIdx) {
let i = keyIdx + 'tool_calls'.length;
while (i < text.length && text[i] !== ':') {
i += 1;
}
if (i >= text.length) {
return -1;
}
i = skipSpaces(text, i + 1);
if (i >= text.length || text[i] !== '[') {
return -1;
}
return i;
}
function extractToolCallName(text, callStart) {
let valueStart = findObjectFieldValueStart(text, callStart, ['name']);
if (valueStart < 0 || text[valueStart] !== '"') {
const fnStart = findFunctionObjectStart(text, callStart);
if (fnStart < 0) {
return '';
}
valueStart = findObjectFieldValueStart(text, fnStart, ['name']);
if (valueStart < 0 || text[valueStart] !== '"') {
return '';
}
}
const parsed = parseJSONStringLiteral(text, valueStart);
if (!parsed) {
return '';
}
return parsed.value;
}
function findToolCallArgsStart(text, callStart) {
const keys = ['input', 'arguments', 'args', 'parameters', 'params'];
let valueStart = findObjectFieldValueStart(text, callStart, keys);
if (valueStart < 0) {
const fnStart = findFunctionObjectStart(text, callStart);
if (fnStart < 0) {
return null;
}
valueStart = findObjectFieldValueStart(text, fnStart, keys);
if (valueStart < 0) {
return null;
}
}
if (valueStart >= text.length) {
return null;
}
const ch = text[valueStart];
if (ch === '{' || ch === '[') {
return { start: valueStart, stringMode: false };
}
if (ch === '"') {
return { start: valueStart, stringMode: true };
}
return null;
}
function scanToolCallArgsProgress(text, start, stringMode) {
if (start < 0 || start > text.length) {
return null;
}
if (stringMode) {
let escaped = false;
for (let i = start; i < text.length; i += 1) {
const ch = text[i];
if (escaped) {
escaped = false;
continue;
}
if (ch === '\\') {
escaped = true;
continue;
}
if (ch === '"') {
return { end: i, complete: true };
}
}
return { end: text.length, complete: false };
}
if (start >= text.length || (text[start] !== '{' && text[start] !== '[')) {
return null;
}
let depth = 0;
let quote = '';
let escaped = false;
for (let i = start; i < text.length; i += 1) {
const ch = text[i];
if (quote) {
if (escaped) {
escaped = false;
continue;
}
if (ch === '\\') {
escaped = true;
continue;
}
if (ch === quote) {
quote = '';
}
continue;
}
if (ch === '"' || ch === "'") {
quote = ch;
continue;
}
if (ch === '{' || ch === '[') {
depth += 1;
continue;
}
if (ch === '}' || ch === ']') {
depth -= 1;
if (depth === 0) {
return { end: i + 1, complete: true };
}
}
}
return { end: text.length, complete: false };
}
function findObjectFieldValueStart(text, objStart, keys) {
if (!text || objStart < 0 || objStart >= text.length || text[objStart] !== '{') {
return -1;
}
let depth = 0;
let quote = '';
let escaped = false;
for (let i = objStart; i < text.length; i += 1) {
const ch = text[i];
if (quote) {
if (escaped) {
escaped = false;
continue;
}
if (ch === '\\') {
escaped = true;
continue;
}
if (ch === quote) {
quote = '';
}
continue;
}
if (ch === '"' || ch === "'") {
if (depth === 1) {
const parsed = parseJSONStringLiteral(text, i);
if (!parsed) {
return -1;
}
let j = skipSpaces(text, parsed.end);
if (j >= text.length || text[j] !== ':') {
i = parsed.end - 1;
continue;
}
j = skipSpaces(text, j + 1);
if (j >= text.length) {
return -1;
}
if (keys.includes(parsed.value)) {
return j;
}
i = j - 1;
continue;
}
quote = ch;
continue;
}
if (ch === '{') {
depth += 1;
continue;
}
if (ch === '}') {
depth -= 1;
if (depth === 0) {
break;
}
}
}
return -1;
}
function findFunctionObjectStart(text, callStart) {
const valueStart = findObjectFieldValueStart(text, callStart, ['function']);
if (valueStart < 0 || valueStart >= text.length || text[valueStart] !== '{') {
return -1;
}
return valueStart;
}
function parseJSONStringLiteral(text, start) {
if (!text || start < 0 || start >= text.length || text[start] !== '"') {
return null;
}
let out = '';
let escaped = false;
for (let i = start + 1; i < text.length; i += 1) {
const ch = text[i];
if (escaped) {
out += ch;
escaped = false;
continue;
}
if (ch === '\\') {
escaped = true;
continue;
}
if (ch === '"') {
return { value: out, end: i + 1 };
}
out += ch;
}
return null;
}
function skipSpaces(text, i) {
let idx = i;
while (idx < text.length) {
const ch = text[idx];
if (ch === ' ' || ch === '\t' || ch === '\n' || ch === '\r') {
idx += 1;
continue;
}
break;
}
return idx;
}
function extractJSONObjectFrom(text, start) {
if (!text || start < 0 || start >= text.length || text[start] !== '{') {
return { ok: false, end: 0 };
}
let depth = 0;
let quote = '';
let escaped = false;
for (let i = start; i < text.length; i += 1) {
const ch = text[i];
if (quote) {
if (escaped) {
escaped = false;
continue;
}
if (ch === '\\') {
escaped = true;
continue;
}
if (ch === quote) {
quote = '';
}
continue;
}
if (ch === '"' || ch === "'") {
quote = ch;
continue;
}
if (ch === '{') {
depth += 1;
continue;
}
if (ch === '}') {
depth -= 1;
if (depth === 0) {
return { ok: true, end: i + 1 };
}
}
}
return { ok: false, end: 0 };
}
function parseToolCalls(text, toolNames) {
if (!toStringSafe(text)) {
return [];
}
const sanitized = stripFencedCodeBlocks(text);
if (!toStringSafe(sanitized)) {
return [];
}
const candidates = buildToolCallCandidates(sanitized);
let parsed = [];
for (const c of candidates) {
parsed = parseToolCallsPayload(c);
if (parsed.length > 0) {
break;
}
}
if (parsed.length === 0) {
return [];
}
return filterToolCalls(parsed, toolNames);
}
function stripFencedCodeBlocks(text) {
const t = typeof text === 'string' ? text : '';
if (!t) {
return '';
}
return t.replace(/```[\s\S]*?```/g, ' ');
}
function parseStandaloneToolCalls(text, toolNames) {
const trimmed = toStringSafe(text);
if (!trimmed) {
return [];
}
if ((trimmed.startsWith('```') && trimmed.endsWith('```')) || trimmed.includes('```')) {
return [];
}
if (looksLikeToolExampleContext(trimmed)) {
return [];
}
const candidates = [trimmed];
if (trimmed.startsWith('```') && trimmed.endsWith('```')) {
const m = trimmed.match(/```(?:json)?\s*([\s\S]*?)\s*```/i);
if (m && m[1]) {
candidates.push(toStringSafe(m[1]));
}
}
for (const candidate of candidates) {
const c = toStringSafe(candidate);
if (!c) {
continue;
}
if (!c.startsWith('{') && !c.startsWith('[')) {
continue;
}
const parsed = parseToolCallsPayload(c);
if (parsed.length > 0) {
return filterToolCalls(parsed, toolNames);
}
}
return [];
}
function buildToolCallCandidates(text) {
const trimmed = toStringSafe(text);
const candidates = [trimmed];
const fenced = trimmed.match(/```(?:json)?\s*([\s\S]*?)\s*```/gi) || [];
for (const block of fenced) {
const m = block.match(/```(?:json)?\s*([\s\S]*?)\s*```/i);
if (m && m[1]) {
candidates.push(toStringSafe(m[1]));
}
}
for (const candidate of extractToolCallObjects(trimmed)) {
candidates.push(toStringSafe(candidate));
}
const first = trimmed.indexOf('{');
const last = trimmed.lastIndexOf('}');
if (first >= 0 && last > first) {
candidates.push(toStringSafe(trimmed.slice(first, last + 1)));
}
const m = trimmed.match(TOOL_CALL_PATTERN);
if (m && m[1]) {
candidates.push(`{"tool_calls":[${m[1]}]}`);
}
return [...new Set(candidates.filter(Boolean))];
}
function extractToolCallObjects(text) {
const raw = toStringSafe(text);
if (!raw) {
return [];
}
const lower = raw.toLowerCase();
const out = [];
let offset = 0;
// eslint-disable-next-line no-constant-condition
while (true) {
let idx = lower.indexOf('tool_calls', offset);
if (idx < 0) {
break;
}
let start = raw.slice(0, idx).lastIndexOf('{');
while (start >= 0) {
const obj = extractJSONObjectFrom(raw, start);
if (obj.ok) {
out.push(raw.slice(start, obj.end).trim());
offset = obj.end;
idx = -1;
break;
}
start = raw.slice(0, start).lastIndexOf('{');
}
if (idx >= 0) {
offset = idx + 'tool_calls'.length;
}
}
return out;
}
function parseToolCallsPayload(payload) {
let decoded;
try {
decoded = JSON.parse(payload);
} catch (_err) {
return [];
}
if (Array.isArray(decoded)) {
return parseToolCallList(decoded);
}
if (!decoded || typeof decoded !== 'object') {
return [];
}
if (decoded.tool_calls) {
return parseToolCallList(decoded.tool_calls);
}
const one = parseToolCallItem(decoded);
return one ? [one] : [];
}
function parseToolCallList(v) {
if (!Array.isArray(v)) {
return [];
}
const out = [];
for (const item of v) {
if (!item || typeof item !== 'object') {
continue;
}
const one = parseToolCallItem(item);
if (one) {
out.push(one);
}
}
return out;
}
function parseToolCallItem(m) {
let name = toStringSafe(m.name);
let inputRaw = m.input;
let hasInput = Object.prototype.hasOwnProperty.call(m, 'input');
const fn = m.function && typeof m.function === 'object' ? m.function : null;
if (fn) {
if (!name) {
name = toStringSafe(fn.name);
}
if (!hasInput && Object.prototype.hasOwnProperty.call(fn, 'arguments')) {
inputRaw = fn.arguments;
hasInput = true;
}
}
if (!hasInput) {
for (const k of ['arguments', 'args', 'parameters', 'params']) {
if (Object.prototype.hasOwnProperty.call(m, k)) {
inputRaw = m[k];
hasInput = true;
break;
}
}
}
if (!name) {
return null;
}
return {
name,
input: parseToolCallInput(inputRaw),
};
}
function parseToolCallInput(v) {
if (v == null) {
return {};
}
if (typeof v === 'string') {
const raw = toStringSafe(v);
if (!raw) {
return {};
}
try {
const parsed = JSON.parse(raw);
if (parsed && typeof parsed === 'object' && !Array.isArray(parsed)) {
return parsed;
}
return { _raw: raw };
} catch (_err) {
return { _raw: raw };
}
}
if (typeof v === 'object' && !Array.isArray(v)) {
return v;
}
try {
const parsed = JSON.parse(JSON.stringify(v));
if (parsed && typeof parsed === 'object' && !Array.isArray(parsed)) {
return parsed;
}
} catch (_err) {
return {};
}
return {};
}
function filterToolCalls(parsed, toolNames) {
const allowed = new Set((toolNames || []).filter(Boolean));
const out = [];
for (const tc of parsed) {
if (!tc || !tc.name) {
continue;
}
if (allowed.size > 0 && !allowed.has(tc.name)) {
continue;
}
out.push({ name: tc.name, input: tc.input || {} });
}
if (out.length === 0 && parsed.length > 0) {
for (const tc of parsed) {
if (!tc || !tc.name) {
continue;
}
out.push({ name: tc.name, input: tc.input || {} });
}
}
return out;
}
function noteText(state, text) {
if (!state || !hasMeaningfulText(text)) {
return;
}
state.recentTextTail = appendTail(state.recentTextTail, text, TOOL_SIEVE_CONTEXT_TAIL_LIMIT);
}
function appendTail(prev, next, max) {
const left = typeof prev === 'string' ? prev : '';
const right = typeof next === 'string' ? next : '';
if (!Number.isFinite(max) || max <= 0) {
return '';
}
const combined = left + right;
if (combined.length <= max) {
return combined;
}
return combined.slice(combined.length - max);
}
function looksLikeToolExampleContext(text) {
return insideCodeFence(text);
}
function insideCodeFence(text) {
const t = typeof text === 'string' ? text : '';
if (!t) {
return false;
}
const ticks = (t.match(/```/g) || []).length;
return ticks % 2 === 1;
}
function hasMeaningfulText(text) {
return toStringSafe(text) !== '';
}
function formatOpenAIStreamToolCalls(calls) {
if (!Array.isArray(calls) || calls.length === 0) {
return [];
}
return calls.map((c, idx) => ({
index: idx,
id: `call_${newCallID()}`,
type: 'function',
function: {
name: c.name,
arguments: JSON.stringify(c.input || {}),
},
}));
}
function newCallID() {
if (typeof crypto.randomUUID === 'function') {
return crypto.randomUUID().replace(/-/g, '');
}
return `${Date.now()}${Math.floor(Math.random() * 1e9)}`;
}
function toStringSafe(v) {
if (typeof v === 'string') {
return v.trim();
}
if (Array.isArray(v)) {
return toStringSafe(v[0]);
}
if (v == null) {
return '';
}
return String(v).trim();
}
module.exports = {
extractToolNames,
createToolSieveState,
processToolSieveChunk,
flushToolSieve,
parseToolCalls,
parseStandaloneToolCalls,
formatOpenAIStreamToolCalls,
};
module.exports = require('./stream-tool-sieve/index.js');

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@@ -0,0 +1,29 @@
'use strict';
const crypto = require('crypto');
function formatOpenAIStreamToolCalls(calls) {
if (!Array.isArray(calls) || calls.length === 0) {
return [];
}
return calls.map((c, idx) => ({
index: idx,
id: `call_${newCallID()}`,
type: 'function',
function: {
name: c.name,
arguments: JSON.stringify(c.input || {}),
},
}));
}
function newCallID() {
if (typeof crypto.randomUUID === 'function') {
return crypto.randomUUID().replace(/-/g, '');
}
return `${Date.now()}${Math.floor(Math.random() * 1e9)}`;
}
module.exports = {
formatOpenAIStreamToolCalls,
};

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@@ -0,0 +1,226 @@
'use strict';
const {
looksLikeToolExampleContext,
insideCodeFence,
} = require('./state');
const {
findObjectFieldValueStart,
parseJSONStringLiteral,
skipSpaces,
} = require('./jsonscan');
function buildIncrementalToolDeltas(state) {
const captured = state.capture || '';
if (!captured) {
return [];
}
if (looksLikeToolExampleContext(state.recentTextTail)) {
return [];
}
const lower = captured.toLowerCase();
const keyIdx = lower.indexOf('tool_calls');
if (keyIdx < 0) {
return [];
}
const start = captured.slice(0, keyIdx).lastIndexOf('{');
if (start < 0) {
return [];
}
if (insideCodeFence((state.recentTextTail || '') + captured.slice(0, start))) {
return [];
}
const callStart = findFirstToolCallObjectStart(captured, keyIdx);
if (callStart < 0) {
return [];
}
const deltas = [];
if (!state.toolName) {
const name = extractToolCallName(captured, callStart);
if (!name) {
return [];
}
state.toolName = name;
}
if (state.toolArgsStart < 0) {
const args = findToolCallArgsStart(captured, callStart);
if (args) {
state.toolArgsString = Boolean(args.stringMode);
state.toolArgsStart = state.toolArgsString ? args.start + 1 : args.start;
state.toolArgsSent = state.toolArgsStart;
}
}
if (!state.toolNameSent) {
if (state.toolArgsStart < 0) {
return [];
}
state.toolNameSent = true;
deltas.push({ index: 0, name: state.toolName });
}
if (state.toolArgsStart < 0 || state.toolArgsDone) {
return deltas;
}
const progress = scanToolCallArgsProgress(captured, state.toolArgsStart, state.toolArgsString);
if (!progress) {
return deltas;
}
if (progress.end > state.toolArgsSent) {
deltas.push({
index: 0,
arguments: captured.slice(state.toolArgsSent, progress.end),
});
state.toolArgsSent = progress.end;
}
if (progress.complete) {
state.toolArgsDone = true;
}
return deltas;
}
function findFirstToolCallObjectStart(text, keyIdx) {
const arrStart = findToolCallsArrayStart(text, keyIdx);
if (arrStart < 0) {
return -1;
}
const i = skipSpaces(text, arrStart + 1);
if (i >= text.length || text[i] !== '{') {
return -1;
}
return i;
}
function findToolCallsArrayStart(text, keyIdx) {
let i = keyIdx + 'tool_calls'.length;
while (i < text.length && text[i] !== ':') {
i += 1;
}
if (i >= text.length) {
return -1;
}
i = skipSpaces(text, i + 1);
if (i >= text.length || text[i] !== '[') {
return -1;
}
return i;
}
function extractToolCallName(text, callStart) {
let valueStart = findObjectFieldValueStart(text, callStart, ['name']);
if (valueStart < 0 || text[valueStart] !== '"') {
const fnStart = findFunctionObjectStart(text, callStart);
if (fnStart < 0) {
return '';
}
valueStart = findObjectFieldValueStart(text, fnStart, ['name']);
if (valueStart < 0 || text[valueStart] !== '"') {
return '';
}
}
const parsed = parseJSONStringLiteral(text, valueStart);
if (!parsed) {
return '';
}
return parsed.value;
}
function findToolCallArgsStart(text, callStart) {
const keys = ['input', 'arguments', 'args', 'parameters', 'params'];
let valueStart = findObjectFieldValueStart(text, callStart, keys);
if (valueStart < 0) {
const fnStart = findFunctionObjectStart(text, callStart);
if (fnStart < 0) {
return null;
}
valueStart = findObjectFieldValueStart(text, fnStart, keys);
if (valueStart < 0) {
return null;
}
}
if (valueStart >= text.length) {
return null;
}
const ch = text[valueStart];
if (ch === '{' || ch === '[') {
return { start: valueStart, stringMode: false };
}
if (ch === '"') {
return { start: valueStart, stringMode: true };
}
return null;
}
function scanToolCallArgsProgress(text, start, stringMode) {
if (start < 0 || start > text.length) {
return null;
}
if (stringMode) {
let escaped = false;
for (let i = start; i < text.length; i += 1) {
const ch = text[i];
if (escaped) {
escaped = false;
continue;
}
if (ch === '\\') {
escaped = true;
continue;
}
if (ch === '"') {
return { end: i, complete: true };
}
}
return { end: text.length, complete: false };
}
if (start >= text.length || (text[start] !== '{' && text[start] !== '[')) {
return null;
}
let depth = 0;
let quote = '';
let escaped = false;
for (let i = start; i < text.length; i += 1) {
const ch = text[i];
if (quote) {
if (escaped) {
escaped = false;
continue;
}
if (ch === '\\') {
escaped = true;
continue;
}
if (ch === quote) {
quote = '';
}
continue;
}
if (ch === '"' || ch === "'") {
quote = ch;
continue;
}
if (ch === '{' || ch === '[') {
depth += 1;
continue;
}
if (ch === '}' || ch === ']') {
depth -= 1;
if (depth === 0) {
return { end: i + 1, complete: true };
}
}
}
return { end: text.length, complete: false };
}
function findFunctionObjectStart(text, callStart) {
const valueStart = findObjectFieldValueStart(text, callStart, ['function']);
if (valueStart < 0 || valueStart >= text.length || text[valueStart] !== '{') {
return -1;
}
return valueStart;
}
module.exports = {
buildIncrementalToolDeltas,
};

View File

@@ -0,0 +1,27 @@
'use strict';
const {
createToolSieveState,
} = require('./state');
const {
processToolSieveChunk,
flushToolSieve,
} = require('./sieve');
const {
extractToolNames,
parseToolCalls,
parseStandaloneToolCalls,
} = require('./parse');
const {
formatOpenAIStreamToolCalls,
} = require('./format');
module.exports = {
extractToolNames,
createToolSieveState,
processToolSieveChunk,
flushToolSieve,
parseToolCalls,
parseStandaloneToolCalls,
formatOpenAIStreamToolCalls,
};

View File

@@ -0,0 +1,148 @@
'use strict';
function findObjectFieldValueStart(text, objStart, keys) {
if (!text || objStart < 0 || objStart >= text.length || text[objStart] !== '{') {
return -1;
}
let depth = 0;
let quote = '';
let escaped = false;
for (let i = objStart; i < text.length; i += 1) {
const ch = text[i];
if (quote) {
if (escaped) {
escaped = false;
continue;
}
if (ch === '\\') {
escaped = true;
continue;
}
if (ch === quote) {
quote = '';
}
continue;
}
if (ch === '"' || ch === "'") {
if (depth === 1) {
const parsed = parseJSONStringLiteral(text, i);
if (!parsed) {
return -1;
}
let j = skipSpaces(text, parsed.end);
if (j >= text.length || text[j] !== ':') {
i = parsed.end - 1;
continue;
}
j = skipSpaces(text, j + 1);
if (j >= text.length) {
return -1;
}
if (keys.includes(parsed.value)) {
return j;
}
i = j - 1;
continue;
}
quote = ch;
continue;
}
if (ch === '{') {
depth += 1;
continue;
}
if (ch === '}') {
depth -= 1;
if (depth === 0) {
break;
}
}
}
return -1;
}
function parseJSONStringLiteral(text, start) {
if (!text || start < 0 || start >= text.length || text[start] !== '"') {
return null;
}
let out = '';
let escaped = false;
for (let i = start + 1; i < text.length; i += 1) {
const ch = text[i];
if (escaped) {
out += ch;
escaped = false;
continue;
}
if (ch === '\\') {
escaped = true;
continue;
}
if (ch === '"') {
return { value: out, end: i + 1 };
}
out += ch;
}
return null;
}
function skipSpaces(text, i) {
let idx = i;
while (idx < text.length) {
const ch = text[idx];
if (ch === ' ' || ch === '\t' || ch === '\n' || ch === '\r') {
idx += 1;
continue;
}
break;
}
return idx;
}
function extractJSONObjectFrom(text, start) {
if (!text || start < 0 || start >= text.length || text[start] !== '{') {
return { ok: false, end: 0 };
}
let depth = 0;
let quote = '';
let escaped = false;
for (let i = start; i < text.length; i += 1) {
const ch = text[i];
if (quote) {
if (escaped) {
escaped = false;
continue;
}
if (ch === '\\') {
escaped = true;
continue;
}
if (ch === quote) {
quote = '';
}
continue;
}
if (ch === '"' || ch === "'") {
quote = ch;
continue;
}
if (ch === '{') {
depth += 1;
continue;
}
if (ch === '}') {
depth -= 1;
if (depth === 0) {
return { ok: true, end: i + 1 };
}
}
}
return { ok: false, end: 0 };
}
module.exports = {
findObjectFieldValueStart,
parseJSONStringLiteral,
skipSpaces,
extractJSONObjectFrom,
};

View File

@@ -0,0 +1,281 @@
'use strict';
const TOOL_CALL_PATTERN = /\{\s*["']tool_calls["']\s*:\s*\[(.*?)\]\s*\}/s;
const {
toStringSafe,
looksLikeToolExampleContext,
} = require('./state');
const {
extractJSONObjectFrom,
} = require('./jsonscan');
function extractToolNames(tools) {
if (!Array.isArray(tools) || tools.length === 0) {
return [];
}
const out = [];
for (const t of tools) {
if (!t || typeof t !== 'object') {
continue;
}
const fn = t.function && typeof t.function === 'object' ? t.function : t;
const name = toStringSafe(fn.name);
// Keep parity with Go injectToolPrompt: object tools without name still
// enter tool mode via fallback name "unknown".
out.push(name || 'unknown');
}
return out;
}
function parseToolCalls(text, toolNames) {
if (!toStringSafe(text)) {
return [];
}
const sanitized = stripFencedCodeBlocks(text);
if (!toStringSafe(sanitized)) {
return [];
}
const candidates = buildToolCallCandidates(sanitized);
let parsed = [];
for (const c of candidates) {
parsed = parseToolCallsPayload(c);
if (parsed.length > 0) {
break;
}
}
if (parsed.length === 0) {
return [];
}
return filterToolCalls(parsed, toolNames);
}
function stripFencedCodeBlocks(text) {
const t = typeof text === 'string' ? text : '';
if (!t) {
return '';
}
return t.replace(/```[\s\S]*?```/g, ' ');
}
function parseStandaloneToolCalls(text, toolNames) {
const trimmed = toStringSafe(text);
if (!trimmed) {
return [];
}
if ((trimmed.startsWith('```') && trimmed.endsWith('```')) || trimmed.includes('```')) {
return [];
}
if (looksLikeToolExampleContext(trimmed)) {
return [];
}
const candidates = [trimmed];
if (trimmed.startsWith('```') && trimmed.endsWith('```')) {
const m = trimmed.match(/```(?:json)?\s*([\s\S]*?)\s*```/i);
if (m && m[1]) {
candidates.push(toStringSafe(m[1]));
}
}
for (const candidate of candidates) {
const c = toStringSafe(candidate);
if (!c) {
continue;
}
if (!c.startsWith('{') && !c.startsWith('[')) {
continue;
}
const parsed = parseToolCallsPayload(c);
if (parsed.length > 0) {
return filterToolCalls(parsed, toolNames);
}
}
return [];
}
function buildToolCallCandidates(text) {
const trimmed = toStringSafe(text);
const candidates = [trimmed];
const fenced = trimmed.match(/```(?:json)?\s*([\s\S]*?)\s*```/gi) || [];
for (const block of fenced) {
const m = block.match(/```(?:json)?\s*([\s\S]*?)\s*```/i);
if (m && m[1]) {
candidates.push(toStringSafe(m[1]));
}
}
for (const candidate of extractToolCallObjects(trimmed)) {
candidates.push(toStringSafe(candidate));
}
const first = trimmed.indexOf('{');
const last = trimmed.lastIndexOf('}');
if (first >= 0 && last > first) {
candidates.push(toStringSafe(trimmed.slice(first, last + 1)));
}
const m = trimmed.match(TOOL_CALL_PATTERN);
if (m && m[1]) {
candidates.push(`{"tool_calls":[${m[1]}]}`);
}
return [...new Set(candidates.filter(Boolean))];
}
function extractToolCallObjects(text) {
const raw = toStringSafe(text);
if (!raw) {
return [];
}
const lower = raw.toLowerCase();
const out = [];
let offset = 0;
// eslint-disable-next-line no-constant-condition
while (true) {
let idx = lower.indexOf('tool_calls', offset);
if (idx < 0) {
break;
}
let start = raw.slice(0, idx).lastIndexOf('{');
while (start >= 0) {
const obj = extractJSONObjectFrom(raw, start);
if (obj.ok) {
out.push(raw.slice(start, obj.end).trim());
offset = obj.end;
idx = -1;
break;
}
start = raw.slice(0, start).lastIndexOf('{');
}
if (idx >= 0) {
offset = idx + 'tool_calls'.length;
}
}
return out;
}
function parseToolCallsPayload(payload) {
let decoded;
try {
decoded = JSON.parse(payload);
} catch (_err) {
return [];
}
if (Array.isArray(decoded)) {
return parseToolCallList(decoded);
}
if (!decoded || typeof decoded !== 'object') {
return [];
}
if (decoded.tool_calls) {
return parseToolCallList(decoded.tool_calls);
}
const one = parseToolCallItem(decoded);
return one ? [one] : [];
}
function parseToolCallList(v) {
if (!Array.isArray(v)) {
return [];
}
const out = [];
for (const item of v) {
if (!item || typeof item !== 'object') {
continue;
}
const one = parseToolCallItem(item);
if (one) {
out.push(one);
}
}
return out;
}
function parseToolCallItem(m) {
let name = toStringSafe(m.name);
let inputRaw = m.input;
let hasInput = Object.prototype.hasOwnProperty.call(m, 'input');
const fn = m.function && typeof m.function === 'object' ? m.function : null;
if (fn) {
if (!name) {
name = toStringSafe(fn.name);
}
if (!hasInput && Object.prototype.hasOwnProperty.call(fn, 'arguments')) {
inputRaw = fn.arguments;
hasInput = true;
}
}
if (!hasInput) {
for (const k of ['arguments', 'args', 'parameters', 'params']) {
if (Object.prototype.hasOwnProperty.call(m, k)) {
inputRaw = m[k];
hasInput = true;
break;
}
}
}
if (!name) {
return null;
}
return {
name,
input: parseToolCallInput(inputRaw),
};
}
function parseToolCallInput(v) {
if (v == null) {
return {};
}
if (typeof v === 'string') {
const raw = toStringSafe(v);
if (!raw) {
return {};
}
try {
const parsed = JSON.parse(raw);
if (parsed && typeof parsed === 'object' && !Array.isArray(parsed)) {
return parsed;
}
return { _raw: raw };
} catch (_err) {
return { _raw: raw };
}
}
if (typeof v === 'object' && !Array.isArray(v)) {
return v;
}
try {
const parsed = JSON.parse(JSON.stringify(v));
if (parsed && typeof parsed === 'object' && !Array.isArray(parsed)) {
return parsed;
}
} catch (_err) {
return {};
}
return {};
}
function filterToolCalls(parsed, toolNames) {
const allowed = new Set((toolNames || []).filter(Boolean));
const out = [];
for (const tc of parsed) {
if (!tc || !tc.name) {
continue;
}
if (allowed.size > 0 && !allowed.has(tc.name)) {
continue;
}
out.push({ name: tc.name, input: tc.input || {} });
}
if (out.length === 0 && parsed.length > 0) {
for (const tc of parsed) {
if (!tc || !tc.name) {
continue;
}
out.push({ name: tc.name, input: tc.input || {} });
}
}
return out;
}
module.exports = {
extractToolNames,
parseToolCalls,
parseStandaloneToolCalls,
};

View File

@@ -0,0 +1,252 @@
'use strict';
const {
TOOL_SIEVE_CAPTURE_LIMIT,
resetIncrementalToolState,
noteText,
insideCodeFence,
} = require('./state');
const {
buildIncrementalToolDeltas,
} = require('./incremental');
const {
parseStandaloneToolCalls,
} = require('./parse');
const {
extractJSONObjectFrom,
} = require('./jsonscan');
function processToolSieveChunk(state, chunk, toolNames) {
if (!state) {
return [];
}
if (chunk) {
state.pending += chunk;
}
const events = [];
// eslint-disable-next-line no-constant-condition
while (true) {
if (state.capturing) {
if (state.pending) {
state.capture += state.pending;
state.pending = '';
}
const deltas = buildIncrementalToolDeltas(state);
if (deltas.length > 0) {
events.push({ type: 'tool_call_deltas', deltas });
}
const consumed = consumeToolCapture(state, toolNames);
if (!consumed.ready) {
if (state.capture.length > TOOL_SIEVE_CAPTURE_LIMIT) {
noteText(state, state.capture);
events.push({ type: 'text', text: state.capture });
state.capture = '';
state.capturing = false;
resetIncrementalToolState(state);
continue;
}
break;
}
state.capture = '';
state.capturing = false;
resetIncrementalToolState(state);
if (consumed.prefix) {
noteText(state, consumed.prefix);
events.push({ type: 'text', text: consumed.prefix });
}
if (Array.isArray(consumed.calls) && consumed.calls.length > 0) {
events.push({ type: 'tool_calls', calls: consumed.calls });
}
if (consumed.suffix) {
state.pending += consumed.suffix;
}
continue;
}
if (!state.pending) {
break;
}
const start = findToolSegmentStart(state.pending);
if (start >= 0) {
const prefix = state.pending.slice(0, start);
if (prefix) {
noteText(state, prefix);
events.push({ type: 'text', text: prefix });
}
state.capture = state.pending.slice(start);
state.pending = '';
state.capturing = true;
resetIncrementalToolState(state);
continue;
}
const [safe, hold] = splitSafeContentForToolDetection(state.pending);
if (!safe) {
break;
}
state.pending = hold;
noteText(state, safe);
events.push({ type: 'text', text: safe });
}
return events;
}
function flushToolSieve(state, toolNames) {
if (!state) {
return [];
}
const events = processToolSieveChunk(state, '', toolNames);
if (state.capturing) {
const consumed = consumeToolCapture(state, toolNames);
if (consumed.ready) {
if (consumed.prefix) {
noteText(state, consumed.prefix);
events.push({ type: 'text', text: consumed.prefix });
}
if (Array.isArray(consumed.calls) && consumed.calls.length > 0) {
events.push({ type: 'tool_calls', calls: consumed.calls });
}
if (consumed.suffix) {
noteText(state, consumed.suffix);
events.push({ type: 'text', text: consumed.suffix });
}
} else if (state.capture) {
noteText(state, state.capture);
events.push({ type: 'text', text: state.capture });
}
state.capture = '';
state.capturing = false;
resetIncrementalToolState(state);
}
if (state.pending) {
noteText(state, state.pending);
events.push({ type: 'text', text: state.pending });
state.pending = '';
}
return events;
}
function splitSafeContentForToolDetection(s) {
const text = s || '';
if (!text) {
return ['', ''];
}
const suspiciousStart = findSuspiciousPrefixStart(text);
if (suspiciousStart < 0) {
return [text, ''];
}
if (suspiciousStart > 0) {
return [text.slice(0, suspiciousStart), text.slice(suspiciousStart)];
}
// If suspicious content starts at the beginning, keep holding until we can
// either parse a full tool JSON block or reach stream flush.
return ['', text];
}
function findSuspiciousPrefixStart(s) {
let start = -1;
for (const needle of ['{', '[', '```']) {
const idx = s.lastIndexOf(needle);
if (idx > start) {
start = idx;
}
}
return start;
}
function findToolSegmentStart(s) {
if (!s) {
return -1;
}
const lower = s.toLowerCase();
let offset = 0;
// eslint-disable-next-line no-constant-condition
while (true) {
const keyRel = lower.indexOf('tool_calls', offset);
if (keyRel < 0) {
return -1;
}
const keyIdx = keyRel;
const start = s.slice(0, keyIdx).lastIndexOf('{');
const candidateStart = start >= 0 ? start : keyIdx;
if (!insideCodeFence(s.slice(0, candidateStart))) {
return candidateStart;
}
offset = keyIdx + 'tool_calls'.length;
}
}
function consumeToolCapture(state, toolNames) {
const captured = state.capture;
if (!captured) {
return { ready: false, prefix: '', calls: [], suffix: '' };
}
const lower = captured.toLowerCase();
const keyIdx = lower.indexOf('tool_calls');
if (keyIdx < 0) {
return { ready: false, prefix: '', calls: [], suffix: '' };
}
const start = captured.slice(0, keyIdx).lastIndexOf('{');
if (start < 0) {
return { ready: false, prefix: '', calls: [], suffix: '' };
}
const obj = extractJSONObjectFrom(captured, start);
if (!obj.ok) {
return { ready: false, prefix: '', calls: [], suffix: '' };
}
const prefixPart = captured.slice(0, start);
const suffixPart = captured.slice(obj.end);
if (insideCodeFence((state.recentTextTail || '') + prefixPart)) {
return {
ready: true,
prefix: captured,
calls: [],
suffix: '',
};
}
const parsed = parseStandaloneToolCalls(captured.slice(start, obj.end), toolNames);
if (parsed.length === 0) {
if (state.toolNameSent) {
return {
ready: true,
prefix: prefixPart,
calls: [],
suffix: suffixPart,
};
}
return {
ready: true,
prefix: captured,
calls: [],
suffix: '',
};
}
if (state.toolNameSent) {
if (parsed.length > 1) {
return {
ready: true,
prefix: prefixPart,
calls: parsed.slice(1),
suffix: suffixPart,
};
}
return {
ready: true,
prefix: prefixPart,
calls: [],
suffix: suffixPart,
};
}
return {
ready: true,
prefix: prefixPart,
calls: parsed,
suffix: suffixPart,
};
}
module.exports = {
processToolSieveChunk,
flushToolSieve,
};

View File

@@ -0,0 +1,91 @@
'use strict';
const TOOL_SIEVE_CAPTURE_LIMIT = 8 * 1024;
const TOOL_SIEVE_CONTEXT_TAIL_LIMIT = 256;
function createToolSieveState() {
return {
pending: '',
capture: '',
capturing: false,
recentTextTail: '',
toolNameSent: false,
toolName: '',
toolArgsStart: -1,
toolArgsSent: -1,
toolArgsString: false,
toolArgsDone: false,
};
}
function resetIncrementalToolState(state) {
state.toolNameSent = false;
state.toolName = '';
state.toolArgsStart = -1;
state.toolArgsSent = -1;
state.toolArgsString = false;
state.toolArgsDone = false;
}
function noteText(state, text) {
if (!state || !hasMeaningfulText(text)) {
return;
}
state.recentTextTail = appendTail(state.recentTextTail, text, TOOL_SIEVE_CONTEXT_TAIL_LIMIT);
}
function appendTail(prev, next, max) {
const left = typeof prev === 'string' ? prev : '';
const right = typeof next === 'string' ? next : '';
if (!Number.isFinite(max) || max <= 0) {
return '';
}
const combined = left + right;
if (combined.length <= max) {
return combined;
}
return combined.slice(combined.length - max);
}
function looksLikeToolExampleContext(text) {
return insideCodeFence(text);
}
function insideCodeFence(text) {
const t = typeof text === 'string' ? text : '';
if (!t) {
return false;
}
const ticks = (t.match(/```/g) || []).length;
return ticks % 2 === 1;
}
function hasMeaningfulText(text) {
return toStringSafe(text) !== '';
}
function toStringSafe(v) {
if (typeof v === 'string') {
return v.trim();
}
if (Array.isArray(v)) {
return toStringSafe(v[0]);
}
if (v == null) {
return '';
}
return String(v).trim();
}
module.exports = {
TOOL_SIEVE_CAPTURE_LIMIT,
TOOL_SIEVE_CONTEXT_TAIL_LIMIT,
createToolSieveState,
resetIncrementalToolState,
noteText,
appendTail,
looksLikeToolExampleContext,
insideCodeFence,
hasMeaningfulText,
toStringSafe,
};