Initial portal commit: landing + 9 AI-powered apps
Apps: - dwg-rooms: extract room numbers from DWG/DXF - dwg-counting: count symbols in PDF drawings (OpenCV template matching) - contract-check: review PDF contracts against a checklist (Claude vision + Tesseract OCR fallback) - email-drafter: bullet notes → polished Czech/English business emails - invoice-extractor: PDF/image invoice → structured data → Excel - translator: Czech-first translator across 19 languages with tone control - vv-check: find inconsistent unit prices across VV sheets in one workbook - vv-compare: diff original vs new VV files (changes / added / removed) - feature-request: portal users submit ideas + sample files Infrastructure: - LiteLLM gateway with per-app virtual keys + budgets - Langfuse observability - Geist font, shared theme, cross-subdomain back link + theme sync via cookie/URL - Caddy reverse proxy on *.klas.chat
This commit is contained in:
Ondřej Glaser
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translator/main.py
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translator/main.py
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"""FastAPI: source text → translated text via Claude Sonnet 4.
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Supports auto-detection of source language and a configurable tone.
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"""
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import json
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import logging
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import os
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from typing import Literal
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from fastapi import FastAPI, HTTPException
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from fastapi.middleware.cors import CORSMiddleware
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from fastapi.responses import FileResponse
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from fastapi.staticfiles import StaticFiles
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from openai import AsyncOpenAI
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from pydantic import BaseModel, Field
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logging.basicConfig(level=logging.INFO)
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logger = logging.getLogger(__name__)
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app = FastAPI(title="Translator")
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app.add_middleware(CORSMiddleware, allow_origins=["*"],
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allow_methods=["*"], allow_headers=["*"])
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MODEL = os.getenv("LLM_MODEL", "anthropic/claude-sonnet-4-20250514")
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_client: AsyncOpenAI | None = None
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def _get_client() -> AsyncOpenAI:
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global _client
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if _client is None:
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_client = AsyncOpenAI(
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base_url=os.getenv("LITELLM_BASE_URL", "http://host.docker.internal:4000/v1"),
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api_key=os.getenv("LITELLM_API_KEY", "sk-dummy"),
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)
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return _client
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# Display name (Czech) and English label for the LLM prompt.
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LANGUAGES = [
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{"code": "auto", "cs": "Automaticky rozpoznat", "en": "auto-detect"},
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{"code": "cs", "cs": "Čeština", "en": "Czech"},
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{"code": "en", "cs": "Angličtina", "en": "English"},
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{"code": "sk", "cs": "Slovenština", "en": "Slovak"},
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{"code": "de", "cs": "Němčina", "en": "German"},
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{"code": "pl", "cs": "Polština", "en": "Polish"},
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{"code": "uk", "cs": "Ukrajinština", "en": "Ukrainian"},
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{"code": "ru", "cs": "Ruština", "en": "Russian"},
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{"code": "fr", "cs": "Francouzština", "en": "French"},
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{"code": "it", "cs": "Italština", "en": "Italian"},
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{"code": "es", "cs": "Španělština", "en": "Spanish"},
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{"code": "pt", "cs": "Portugalština", "en": "Portuguese"},
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{"code": "nl", "cs": "Nizozemština", "en": "Dutch"},
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{"code": "hu", "cs": "Maďarština", "en": "Hungarian"},
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{"code": "ro", "cs": "Rumunština", "en": "Romanian"},
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{"code": "bg", "cs": "Bulharština", "en": "Bulgarian"},
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{"code": "tr", "cs": "Turečtina", "en": "Turkish"},
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{"code": "zh", "cs": "Čínština", "en": "Chinese (Simplified)"},
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{"code": "ja", "cs": "Japonština", "en": "Japanese"},
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{"code": "ar", "cs": "Arabština", "en": "Arabic"},
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]
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LANG_BY_CODE = {l["code"]: l for l in LANGUAGES}
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TONES = {
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"formal": "formal, professional, polished business register",
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"casual": "casual, friendly, conversational",
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"technical": "technical, precise, preserving exact technical terms",
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"marketing": "marketing copy — engaging, persuasive, brand-voice",
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"legal": "legal / contractual — precise, neutral, preserving legal terms of art",
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}
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class TranslateRequest(BaseModel):
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text: str = Field(..., min_length=1, max_length=20000)
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source_lang: str = "auto"
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target_lang: str = "en"
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tone: Literal["formal", "casual", "technical", "marketing", "legal"] = "formal"
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@app.get("/")
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async def root():
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return FileResponse("static/index.html")
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@app.get("/api/languages")
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async def languages():
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return {"languages": LANGUAGES}
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@app.post("/api/translate")
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async def translate(req: TranslateRequest):
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target = LANG_BY_CODE.get(req.target_lang)
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if not target or target["code"] == "auto":
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raise HTTPException(400, "Vyberte cílový jazyk")
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source_label = (
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"auto-detect the source language"
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if req.source_lang == "auto"
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else f"the source language is {LANG_BY_CODE.get(req.source_lang, {}).get('en', req.source_lang)}"
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)
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system = f"""You are a professional translator producing high-quality business translations.
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Translate the user's input into **{target['en']}**.
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{source_label.capitalize()}.
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Tone: **{TONES[req.tone]}**.
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Strict rules:
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- Output ONLY the translated text. No quotes, no preamble, no explanation, no language tag.
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- Preserve formatting: line breaks, lists, paragraphs, code blocks, URLs.
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- Keep proper names, brand names, product codes, and acronyms unchanged unless they have a well-established translation in the target language.
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- Numbers, dates, and currencies: convert format conventions to the target language (e.g. decimal comma vs dot, date format) but do NOT convert values.
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- If the input is already in the target language, return it unchanged.
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- Never add information that isn't in the source."""
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try:
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resp = await _get_client().chat.completions.create(
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model=MODEL,
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messages=[
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{"role": "system", "content": system},
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{"role": "user", "content": req.text},
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],
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temperature=0.2,
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max_tokens=8000,
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)
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except Exception as exc:
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logger.exception("LLM call failed")
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raise HTTPException(500, f"Překlad selhal: {exc}")
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translated = (resp.choices[0].message.content or "").strip()
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# Strip accidental markdown code fences
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if translated.startswith("```") and translated.endswith("```"):
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translated = translated.removeprefix("```").removesuffix("```").strip()
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return {
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"translated": translated,
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"source_lang": req.source_lang,
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"target_lang": req.target_lang,
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"tone": req.tone,
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}
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@app.get("/health")
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async def health():
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return {"status": "ok"}
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app.mount("/static", StaticFiles(directory="static"), name="static")
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