chore: import DH V2 D5.6.4 production baseline

api-v3/src/inspection-reports/smtp-delivery.service.ts

@@ -0,0 +1,37 @@
+import { connect as connectNet, Socket } from 'node:net';
+import { connect as connectTls, TLSSocket } from 'node:tls';
+import { randomUUID } from 'node:crypto';
+import { ConfigService } from '@nestjs/config';
+import { Injectable } from '@nestjs/common';
+
+interface MailAttachment { filename:string; mimeType:string; content:Buffer; }
+interface MailInput { to:string; subject:string; text:string; attachment:MailAttachment; }
+interface Reply { code:number; text:string; }
+
+class SmtpSession {
+  private buffer=''; private waiters:Array<(reply:Reply)=>void>=[]; private replyLines:string[]=[];
+  private readonly dataHandler=(chunk:Buffer|string)=>this.onData(typeof chunk==='string'?chunk:chunk.toString('utf8'));
+  constructor(private socket:Socket|TLSSocket){ this.attach(socket); }
+  private attach(socket:Socket|TLSSocket){ socket.setEncoding('utf8'); socket.setTimeout(15000,()=>socket.destroy(new Error('SMTP timeout'))); socket.on('data',this.dataHandler); }
+  detachForUpgrade(){ this.socket.off('data',this.dataHandler); this.socket.setTimeout(0); return this.socket; }
+  replaceSocket(socket:Socket|TLSSocket){ this.socket=socket; this.buffer=''; this.attach(socket); }
+  private onData(chunk:string){ this.buffer+=chunk; const lines=this.buffer.split(/\r?\n/); this.buffer=lines.pop()??''; for(const line of lines){ if(!line)continue; this.replyLines.push(line); if(/^\d{3} /.test(line)){ const code=Number(line.slice(0,3)); const reply={code,text:this.replyLines.join('\n')}; this.replyLines=[]; const waiter=this.waiters.shift(); if(waiter)waiter(reply); } } }
+  reply():Promise<Reply>{return new Promise((resolve,reject)=>{ const onError=(e:Error)=>{this.socket.off('error',onError);reject(e)}; this.socket.once('error',onError); this.waiters.push((reply)=>{this.socket.off('error',onError);resolve(reply)}); });}
+  async command(command:string, expected:number|number[]){ this.socket.write(`${command}\r\n`); const reply=await this.reply(); const allowed=Array.isArray(expected)?expected:[expected]; if(!allowed.includes(reply.code))throw new Error(`SMTP ${reply.code}: ${reply.text}`); return reply; }
+  write(data:string){this.socket.write(data);}
+  end(){this.socket.end();}
+  current(){return this.socket;}
+}
+
+function subject(value:string){return `=?UTF-8?B?${Buffer.from(value,'utf8').toString('base64')}?=`;}
+function envelope(value:string){const m=value.match(/<([^>]+)>/);return (m?.[1]??value).trim();}
+function mime(input:MailInput,from:string){ const boundary=`dh-${randomUUID()}`; const body=[`From: ${from}`,`To: ${input.to}`,`Subject: ${subject(input.subject)}`,'MIME-Version: 1.0',`Content-Type: multipart/mixed; boundary="${boundary}"`,'',`--${boundary}`,'Content-Type: text/plain; charset=utf-8','Content-Transfer-Encoding: base64','',Buffer.from(input.text,'utf8').toString('base64'),`--${boundary}`,`Content-Type: ${input.attachment.mimeType}; name="${input.attachment.filename.replaceAll('"','')}"`,'Content-Transfer-Encoding: base64',`Content-Disposition: attachment; filename="${input.attachment.filename.replaceAll('"','')}"`,'',input.attachment.content.toString('base64').replace(/(.{76})/g,'$1\r\n'),`--${boundary}--`,''].join('\r\n'); return body.replace(/^\./gm,'..'); }
+
+@Injectable()
+export class SmtpDeliveryService {
+  constructor(private readonly config:ConfigService){}
+  configured(){return Boolean(this.config.get<string>('SMTP_HOST')&&this.config.get<string>('MAIL_FROM'));}
+  async send(input:MailInput):Promise<{messageId:string}>{ const host=this.config.get<string>('SMTP_HOST'); const from=this.config.get<string>('MAIL_FROM'); if(!host||!from)throw new Error('SMTP no configurado'); const port=Number(this.config.get<string>('SMTP_PORT')??587); const secure=String(this.config.get<string>('SMTP_SECURE')??'false').toLowerCase()==='true'; const user=this.config.get<string>('SMTP_USER')??''; const pass=this.config.get<string>('SMTP_PASS')??''; const base=await new Promise<Socket|TLSSocket>((resolve,reject)=>{ if(secure){ const tls=connectTls({host,port,servername:host,rejectUnauthorized:true},()=>resolve(tls)); tls.once('error',reject); } else { const raw=connectNet({host,port},()=>resolve(raw)); raw.once('error',reject); } }); const session=new SmtpSession(base); const welcome=await session.reply(); if(welcome.code!==220)throw new Error(`SMTP ${welcome.code}: ${welcome.text}`); let ehlo=await session.command(`EHLO dh-inspeccion`,250); if(!secure){ if(!/STARTTLS/i.test(ehlo.text))throw new Error('El servidor SMTP no ofrece STARTTLS'); await session.command('STARTTLS',220); const rawForTls=session.detachForUpgrade() as Socket; const upgraded=await new Promise<TLSSocket>((resolve,reject)=>{ const tls=connectTls({socket:rawForTls,servername:host,rejectUnauthorized:true},()=>resolve(tls)); tls.once('error',reject); }); session.replaceSocket(upgraded); ehlo=await session.command('EHLO dh-inspeccion',250); }
+    if(user){ if(/AUTH[^\n]*PLAIN/i.test(ehlo.text)){ const token=Buffer.from(`\u0000${user}\u0000${pass}`,'utf8').toString('base64'); await session.command(`AUTH PLAIN ${token}`,235); } else { await session.command('AUTH LOGIN',334); await session.command(Buffer.from(user).toString('base64'),334); await session.command(Buffer.from(pass).toString('base64'),235); } }
+    await session.command(`MAIL FROM:<${envelope(from)}>`,250); await session.command(`RCPT TO:<${input.to}>`,[250,251]); await session.command('DATA',354); session.write(`${mime(input,from)}\r\n.\r\n`); const sent=await session.reply(); if(sent.code!==250)throw new Error(`SMTP ${sent.code}: ${sent.text}`); await session.command('QUIT',221).catch(()=>undefined); session.end(); const match=sent.text.match(/(?:queued as|id=|message-id[=:]?)[\s<]*([^\s>]+)/i); return {messageId:match?.[1]??randomUUID()}; }
+}