codinit-dev/app/lib/runtime/message-parser.ts at main · BitCodeHub/codinit-dev

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import type { ActionType, BoltAction, BoltActionData, FileAction, ShellAction, SupabaseAction } from '~/types/actions';

import type { CodinitArtifactData, ThinkingArtifactData } from '~/types/artifact';

import type { ThinkingData } from '~/types/thinking';

import { createScopedLogger } from '~/utils/logger';

import { unreachable } from '~/utils/unreachable';

const ARTIFACT_TAG_OPEN = '<codinitArtifact';

const ARTIFACT_TAG_CLOSE = '</codinitArtifact>';

const ARTIFACT_ACTION_TAG_OPEN = '<codinitAction';

const ARTIFACT_ACTION_TAG_CLOSE = '</codinitAction>';

// Legacy codinit tags (for backward compatibility)

const CODINIT_ARTIFACT_TAG_OPEN = '<codinitArtifact';

const CODINIT_ARTIFACT_TAG_CLOSE = '</codinitArtifact>';

const CODINIT_ACTION_TAG_OPEN = '<codinitAction';

const CODINIT_ACTION_TAG_CLOSE = '</codinitAction>';

// Thinking tags

const THINKING_TAG_OPEN = '<codinitThinking';

const THINKING_TAG_CLOSE = '</codinitThinking>';

// Thinking artifact tags

const THINKING_ARTIFACT_TAG_OPEN = '<thinkingArtifact';

const THINKING_ARTIFACT_TAG_CLOSE = '</thinkingArtifact>';

const MAX_FILE_CHUNK_SIZE = 1024 * 1024;

const logger = createScopedLogger('MessageParser');

export interface ArtifactCallbackData extends CodinitArtifactData {

messageId: string;

}

export interface ActionCallbackData {

artifactId: string;

messageId: string;

actionId: string;

action: BoltAction;

}

export interface ThinkingCallbackData extends ThinkingData {

messageId: string;

}

export type ArtifactCallback = (data: ArtifactCallbackData) => void;

export type ActionCallback = (data: ActionCallbackData) => void;

export type ThinkingCallback = (data: ThinkingCallbackData) => void;

export type ThinkingArtifactCallback = (data: ThinkingArtifactCallbackData) => void;

export interface ThinkingArtifactCallbackData extends ThinkingArtifactData {

messageId: string;

}

export interface ParserCallbacks {

onArtifactOpen?: ArtifactCallback;

onArtifactClose?: ArtifactCallback;

onActionOpen?: ActionCallback;

onActionStream?: ActionCallback;

onActionClose?: ActionCallback;

onThinkingOpen?: ThinkingCallback;

onThinkingClose?: ThinkingCallback;

onThinkingArtifactOpen?: ThinkingArtifactCallback;

onThinkingArtifactClose?: ThinkingArtifactCallback;

}

interface ElementFactoryProps {

messageId: string;

}

type ElementFactory = (props: ElementFactoryProps) => string;

export interface StreamingMessageParserOptions {

callbacks?: ParserCallbacks;

artifactElement?: ElementFactory;

thinkingArtifactElement?: ElementFactory;

}

interface MessageState {

position: number;

insideArtifact: boolean;

insideAction: boolean;

insideThinking: boolean;

insideThinkingArtifact: boolean;

actionId: number;

currentArtifact?: CodinitArtifactData;

currentAction?: BoltActionData;

currentThinking?: ThinkingData;

currentThinkingArtifact?: ThinkingArtifactData;

}

function cleanoutMarkdownSyntax(content: string) {

const codeBlockRegex = /^\s*```[\w-]*\s*\n?([\s\S]*?)\n?\s*```\s*$/;

const match = content.match(codeBlockRegex);

if (match) {

return match[1].trim();

}

const multilineCodeBlockRegex = /```[\w-]*\s*\n([\s\S]*?)```/g;

let cleaned = content.replace(multilineCodeBlockRegex, (_match, code) => code.trim());

const inlineCodeBlockRegex = /^```[\w-]*\s*\n?|```\s*$/gm;

cleaned = cleaned.replace(inlineCodeBlockRegex, '');

return cleaned.trim() !== content.trim() ? cleaned.trim() : content;

}

function cleanEscapedTags(content: string) {

return content.replace(/</g, '<').replace(/>/g, '>');

}

export class StreamingMessageParser {

#messages = new Map<string, MessageState>();

constructor(private _options: StreamingMessageParserOptions = {}) {}

parse(messageId: string, input: string) {

let state = this.#messages.get(messageId);

if (!state) {

state = {

position: 0,

insideAction: false,

insideArtifact: false,

insideThinking: false,

insideThinkingArtifact: false,

currentAction: { content: '' },

actionId: 0,

};

this.#messages.set(messageId, state);

}

let output = '';

let i = state.position;

let earlyBreak = false;

while (i < input.length) {

if (state.insideArtifact) {

const currentArtifact = state.currentArtifact;

if (currentArtifact === undefined) {

unreachable('Artifact not initialized');

}

if (state.insideAction) {

let closeIndex = input.indexOf(ARTIFACT_ACTION_TAG_CLOSE, i);

// Also check for legacy codinit action close tag

if (closeIndex === -1) {

closeIndex = input.indexOf(CODINIT_ACTION_TAG_CLOSE, i);

}

const currentAction = state.currentAction;

if (!currentAction) {

break;

}

if (closeIndex !== -1) {

currentAction.content += input.slice(i, closeIndex);

let content = currentAction.content.trim();

if ('type' in currentAction && currentAction.type === 'file') {

// Remove markdown code block syntax if present and file is not markdown

if (!currentAction.filePath.endsWith('.md')) {

content = cleanoutMarkdownSyntax(content);

content = cleanEscapedTags(content);

}

content += '\n';

}

currentAction.content = content;

this._options.callbacks?.onActionClose?.({

artifactId: currentArtifact.id,

messageId,

/**

* We decrement the id because it's been incremented already

* when `onActionOpen` was emitted to make sure the ids are

* the same.

actionId: String(state.actionId - 1),

action: currentAction as BoltAction,

});

state.insideAction = false;

state.currentAction = { content: '' };

// Determine which tag was found to get the correct length

const closeTagLength =

input.indexOf(ARTIFACT_ACTION_TAG_CLOSE, i) === closeIndex

? ARTIFACT_ACTION_TAG_CLOSE.length

: CODINIT_ACTION_TAG_CLOSE.length;

i = closeIndex + closeTagLength;

} else {

if ('type' in currentAction && currentAction.type === 'file') {

let content = input.slice(i);

if (content.length > MAX_FILE_CHUNK_SIZE) {

content = content.slice(0, MAX_FILE_CHUNK_SIZE);

logger.warn(`File content exceeds 1MB limit, truncating for streaming`);

}

if (!currentAction.filePath.endsWith('.md')) {

content = cleanoutMarkdownSyntax(content);

content = cleanEscapedTags(content);

}

this._options.callbacks?.onActionStream?.({

artifactId: currentArtifact.id,

messageId,

actionId: String(state.actionId - 1),

action: {

...(currentAction as FileAction),

content,

filePath: currentAction.filePath,

});

}

break;

}

} else {

let actionOpenIndex = input.indexOf(ARTIFACT_ACTION_TAG_OPEN, i);

let artifactCloseIndex = input.indexOf(ARTIFACT_TAG_CLOSE, i);

const thinkingArtifactCloseIndex = input.indexOf(THINKING_ARTIFACT_TAG_CLOSE, i);

// Also check for legacy codinit tags

const codinitActionOpenIndex = input.indexOf(CODINIT_ACTION_TAG_OPEN, i);

const codinitArtifactCloseIndex = input.indexOf(CODINIT_ARTIFACT_TAG_CLOSE, i);

// Use the earliest action open tag found

if (codinitActionOpenIndex !== -1 && (actionOpenIndex === -1 || codinitActionOpenIndex < actionOpenIndex)) {

actionOpenIndex = codinitActionOpenIndex;

}

// Use the earliest artifact close tag found

if (

codinitArtifactCloseIndex !== -1 &&

(artifactCloseIndex === -1 || codinitArtifactCloseIndex < artifactCloseIndex)

) {

artifactCloseIndex = codinitArtifactCloseIndex;

}

// Use the earliest thinking artifact close tag found

if (

thinkingArtifactCloseIndex !== -1 &&

(artifactCloseIndex === -1 || thinkingArtifactCloseIndex < artifactCloseIndex)

) {

artifactCloseIndex = thinkingArtifactCloseIndex;

}

if (actionOpenIndex !== -1 && (artifactCloseIndex === -1 || actionOpenIndex < artifactCloseIndex)) {

const actionEndIndex = input.indexOf('>', actionOpenIndex);

if (actionEndIndex !== -1) {

state.insideAction = true;

state.currentAction = this.#parseActionTag(input, actionOpenIndex, actionEndIndex);

this._options.callbacks?.onActionOpen?.({

artifactId: currentArtifact.id,

messageId,

actionId: String(state.actionId++),

action: state.currentAction as BoltAction,

});

i = actionEndIndex + 1;

} else {

break;

}

} else if (artifactCloseIndex !== -1) {

if (state.currentArtifact) {

this._options.callbacks?.onArtifactClose?.({ messageId, ...state.currentArtifact });

state.insideArtifact = false;

state.currentArtifact = undefined;

} else if (state.currentThinkingArtifact) {

// Process thinking artifact content to extract steps

const content = state.currentThinkingArtifact.content;

const lines = content.split('\n').filter((line) => line.trim());

const steps: string[] = [];

lines.forEach((line) => {

const trimmed = line.trim();

const numberedMatch = trimmed.match(/^\d+\.\s*(.+)$/);

if (numberedMatch) {

steps.push(numberedMatch[1]);

return;

}

const bulletMatch = trimmed.match(/^[-*]\s*(.+)$/);

if (bulletMatch) {

steps.push(bulletMatch[1]);

return;

}

if (trimmed.length > 0) {

steps.push(trimmed);

}

});

const completedThinkingArtifact = {

...state.currentThinkingArtifact,

steps,

};

this._options.callbacks?.onThinkingArtifactClose?.({ messageId, ...completedThinkingArtifact });

state.insideThinkingArtifact = false;

state.currentThinkingArtifact = undefined;

}

// Determine which tag was found to get the correct length

const closeTagLength =

input.indexOf(ARTIFACT_TAG_CLOSE, i) === artifactCloseIndex

? ARTIFACT_TAG_CLOSE.length

: input.indexOf(CODINIT_ARTIFACT_TAG_CLOSE, i) === artifactCloseIndex

? CODINIT_ARTIFACT_TAG_CLOSE.length

: THINKING_ARTIFACT_TAG_CLOSE.length;

i = artifactCloseIndex + closeTagLength;

} else {

break;

}

} else if (input[i] === '<' && input[i + 1] !== '/') {

let j = i;

let potentialTag = '';

const maxTagLength = Math.max(

ARTIFACT_TAG_OPEN.length,

CODINIT_ARTIFACT_TAG_OPEN.length,

THINKING_TAG_OPEN.length,

THINKING_ARTIFACT_TAG_OPEN.length,

);

while (j < input.length && potentialTag.length < maxTagLength) {

potentialTag += input[j];

const isCodinitTag = potentialTag === ARTIFACT_TAG_OPEN;

const isThinkingTag = potentialTag === THINKING_TAG_OPEN;

const isThinkingArtifactTag = potentialTag === THINKING_ARTIFACT_TAG_OPEN;

if (isThinkingTag) {

const nextChar = input[j + 1];

if (nextChar && nextChar !== '>' && nextChar !== ' ') {

output += input.slice(i, j + 1);

i = j + 1;

break;

}

const openTagEnd = input.indexOf('>', j);

if (openTagEnd !== -1) {

const thinkingTag = input.slice(i, openTagEnd + 1);

const thinkingId = this.#extractAttribute(thinkingTag, 'id') as string;

state.insideThinking = true;

const currentThinking = {

id: thinkingId || `thinking-${Date.now()}`,

content: '',

} satisfies ThinkingData;

state.currentThinking = currentThinking;

this._options.callbacks?.onThinkingOpen?.({ messageId, ...currentThinking });

i = openTagEnd + 1;

} else {

earlyBreak = true;

}

break;

} else if (isThinkingArtifactTag) {

const nextChar = input[j + 1];

if (nextChar && nextChar !== '>' && nextChar !== ' ') {

output += input.slice(i, j + 1);

i = j + 1;

break;

}

const openTagEnd = input.indexOf('>', j);

if (openTagEnd !== -1) {

const thinkingArtifactTag = input.slice(i, openTagEnd + 1);

const thinkingArtifactTitle = this.#extractAttribute(thinkingArtifactTag, 'title') as string;

const thinkingArtifactId = this.#extractAttribute(thinkingArtifactTag, 'id') as string;

if (!thinkingArtifactTitle) {

logger.warn('Thinking artifact title missing');

}

if (!thinkingArtifactId) {

logger.warn('Thinking artifact id missing');

}

state.insideThinkingArtifact = true;

const currentThinkingArtifact = {

id: thinkingArtifactId,

title: thinkingArtifactTitle,

type: 'thinking' as const,

steps: [],

content: '',

} satisfies ThinkingArtifactData;

state.currentThinkingArtifact = currentThinkingArtifact;

this._options.callbacks?.onThinkingArtifactOpen?.({ messageId, ...currentThinkingArtifact });

const thinkingArtifactFactory = this._options.thinkingArtifactElement ?? createThinkingArtifactElement;

output += thinkingArtifactFactory({ messageId });

i = openTagEnd + 1;

} else {

earlyBreak = true;

}

break;

} else if (isCodinitTag || isCodinitTag) {

const nextChar = input[j + 1];

if (nextChar && nextChar !== '>' && nextChar !== ' ') {

output += input.slice(i, j + 1);

i = j + 1;

break;

}

const openTagEnd = input.indexOf('>', j);

if (openTagEnd !== -1) {

const artifactTag = input.slice(i, openTagEnd + 1);

const artifactTitle = this.#extractAttribute(artifactTag, 'title') as string;

const type = this.#extractAttribute(artifactTag, 'type') as string;

const artifactId = this.#extractAttribute(artifactTag, 'id') as string;

if (!artifactTitle) {

logger.warn('Artifact title missing');

}

if (!artifactId) {

logger.warn('Artifact id missing');

}

state.insideArtifact = true;

const currentArtifact = {

id: artifactId,

title: artifactTitle,

type,

} satisfies CodinitArtifactData;

state.currentArtifact = currentArtifact;

this._options.callbacks?.onArtifactOpen?.({ messageId, ...currentArtifact });

const artifactFactory = this._options.artifactElement ?? createArtifactElement;

output += artifactFactory({ messageId });

i = openTagEnd + 1;

} else {

earlyBreak = true;

}

break;

} else if (

!ARTIFACT_TAG_OPEN.startsWith(potentialTag) &&

!CODINIT_ARTIFACT_TAG_OPEN.startsWith(potentialTag) &&

!THINKING_TAG_OPEN.startsWith(potentialTag) &&

!THINKING_ARTIFACT_TAG_OPEN.startsWith(potentialTag)

) {

output += input.slice(i, j + 1);

i = j + 1;

break;

}

j++;

}

if (

j === input.length &&

(ARTIFACT_TAG_OPEN.startsWith(potentialTag) ||

CODINIT_ARTIFACT_TAG_OPEN.startsWith(potentialTag) ||

THINKING_TAG_OPEN.startsWith(potentialTag) ||

THINKING_ARTIFACT_TAG_OPEN.startsWith(potentialTag))

) {

break;

}

} else if (state.insideThinking) {

const closeIndex = input.indexOf(THINKING_TAG_CLOSE, i);

if (closeIndex !== -1) {

const content = input.slice(i, closeIndex);

if (state.currentThinking) {

state.currentThinking.content += content;

output += `<div class="__codinitThinking__" data-message-id="${messageId}">${state.currentThinking.content}</div>`;

this._options.callbacks?.onThinkingClose?.({

messageId,

...state.currentThinking,

});

state.insideThinking = false;

state.currentThinking = undefined;

i = closeIndex + THINKING_TAG_CLOSE.length;

} else {

output += input[i];

i++;

}

} else if (state.insideThinkingArtifact) {

const closeIndex = input.indexOf(THINKING_ARTIFACT_TAG_CLOSE, i);

if (closeIndex !== -1) {

const content = input.slice(i, closeIndex);

if (state.currentThinkingArtifact) {

state.currentThinkingArtifact.content += content;

}

i = closeIndex;

} else {

if (state.currentThinkingArtifact) {

state.currentThinkingArtifact.content += input.slice(i);

}

break;

}

} else {

if (state.currentThinking) {

state.currentThinking.content += input.slice(i);

}

break;

}

} else {

output += input[i];

i++;

}

if (earlyBreak) {

break;

}

state.position = i;

return output;

}

reset() {

this.#messages.clear();

}

#parseActionTag(input: string, actionOpenIndex: number, actionEndIndex: number) {

const actionTag = input.slice(actionOpenIndex, actionEndIndex + 1);

const actionType = this.#extractAttribute(actionTag, 'type') as ActionType;

const actionAttributes = {

type: actionType,

content: '',

};

if (actionType === 'supabase') {

const operation = this.#extractAttribute(actionTag, 'operation');

if (!operation || !['migration', 'query'].includes(operation)) {

logger.warn(`Invalid or missing operation for Supabase action: ${operation}`);

throw new Error(`Invalid Supabase operation: ${operation}`);

}

(actionAttributes as SupabaseAction).operation = operation as 'migration' | 'query';

if (operation === 'migration') {

const filePath = this.#extractAttribute(actionTag, 'filePath');

if (!filePath) {

logger.warn('Migration requires a filePath');

throw new Error('Migration requires a filePath');

}

(actionAttributes as SupabaseAction).filePath = filePath;

}

} else if (actionType === 'file') {

const filePath = this.#extractAttribute(actionTag, 'filePath') as string;

if (!filePath) {

logger.debug('File path not specified');

}

(actionAttributes as FileAction).filePath = filePath;

} else if (!['shell', 'start'].includes(actionType)) {

logger.warn(`Unknown action type '${actionType}'`);

}

return actionAttributes as FileAction | ShellAction;

}

#extractAttribute(tag: string, attributeName: string): string | undefined {

const match = tag.match(new RegExp(`${attributeName}="([^"]*)"`, 'i'));

return match ? match[1] : undefined;

}

const createArtifactElement: ElementFactory = (props) => {

const elementProps = [

'class="__codinitArtifact__"',

...Object.entries(props).map(([key, value]) => {

return `data-${camelToDashCase(key)}=${JSON.stringify(value)}`;

}),

];

return `<div ${elementProps.join(' ')}></div>`;

};

const createThinkingArtifactElement: ElementFactory = (props) => {

const elementProps = [

'class="__thinkingArtifact__"',

...Object.entries(props).map(([key, value]) => {

return `data-${camelToDashCase(key)}=${JSON.stringify(value)}`;

}),

];

return `<div ${elementProps.join(' ')}></div>`;

};

function camelToDashCase(input: string) {

return input.replace(/([a-z])([A-Z])/g, '$1-$2').toLowerCase();

}

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