feat: add script for if

python/interactive-fiction/download.py

@@ -0,0 +1,764 @@
+#!/usr/bin/env python3
+# /// script
+# requires-python = ">=3.11"
+# dependencies = [
+#   "requests==2.32.3",
+#   "tqdm==4.67.1",
+#   "questionary==2.0.1",
+#   "rich==13.9.4",
+# ]
+# ///
+"""
+Interactive TUI wizard for downloading Gargoyle-compatible interactive fiction games from IFDB.
+
+Fetches the IFDB SQL dump, builds an in-memory index, then walks the user through
+filtering by format, rating, and genre before downloading the matching games.
+
+Usage:
+    uv run download.py
+"""
+
+from __future__ import annotations
+
+import io
+import re
+import sys
+import zipfile
+from collections import defaultdict
+from pathlib import Path
+from urllib.parse import unquote, urljoin, urlparse
+
+import questionary
+import requests
+from rich.console import Console
+from rich.table import Table
+from tqdm import tqdm
+
+
+console = Console()
+
+# ---------------------------------------------------------------------------
+# Format families — groups every Gargoyle-compatible extension by interpreter
+# ---------------------------------------------------------------------------
+
+FORMAT_FAMILIES: dict[str, frozenset[str]] = {
+    "Z-machine":       frozenset({".z1", ".z2", ".z3", ".z4", ".z5", ".z6", ".z7", ".z8", ".zblorb", ".zlb"}),
+    "Glulx":           frozenset({".ulx", ".gblorb", ".glb", ".blorb", ".blb"}),
+    "TADS 2":          frozenset({".gam"}),
+    "TADS 3":          frozenset({".t3"}),
+    "Hugo":            frozenset({".hex"}),
+    "ADRIFT":          frozenset({".taf"}),
+    "Alan":            frozenset({".acd", ".a2c", ".a3c"}),
+    "Level 9":         frozenset({".l9", ".sna"}),
+    "Magnetic Scrolls": frozenset({".mag"}),
+    "AGT":             frozenset({".agx"}),
+    "JACL":            frozenset({".jacl", ".j2"}),
+    "Scott Adams":     frozenset({".saga"}),
+}
+
+GARGOYLE_EXTENSIONS: frozenset[str] = frozenset().union(*FORMAT_FAMILIES.values())
+
+DUMP_URL_CANDIDATES: list[str] = [
+    "https://ifarchive.org/if-archive/info/ifdb/ifdb-archive-20260301.zip",
+    "https://ifarchive.org/if-archive/info/ifdb/ifdb-archive-20251201.zip",
+    "https://ifarchive.org/if-archive/info/ifdb/ifdb-archive-20250901.zip",
+    "https://ifarchive.org/if-archive/info/ifdb/ifdb-archive-20250601.zip",
+    "https://ifarchive.org/if-archive/info/ifdb/ifdb-archive-20250301.zip",
+    "https://ifarchive.org/if-archive/info/ifdb/ifdb-archive-20241201.zip",
+    "https://ifarchive.org/if-archive/info/ifdb/ifdb-archive-20240901.zip",
+    "https://ifarchive.org/if-archive/info/ifdb/ifdb-archive-20240601.zip",
+    "https://ifarchive.org/if-archive/info/ifdb/ifdb-archive-20240301.zip",
+]
+
+IFARCHIVE_BASE = "https://ifarchive.org"
+BAYESIAN_WEIGHT = 10
+
+BROWSER_HEADERS = {
+    "User-Agent": (
+        "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 "
+        "(KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36"
+    ),
+    "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
+}
+
+
+# ---------------------------------------------------------------------------
+# Welcome screen
+# ---------------------------------------------------------------------------
+
+def show_welcome() -> None:
+    console.print()
+    console.print("[bold cyan]━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━[/bold cyan]")
+    console.print("[bold white]  IFDB Interactive Fiction Downloader[/bold white]")
+    console.print("[bold cyan]━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━[/bold cyan]")
+    console.print()
+    console.print(
+        "This tool downloads interactive fiction games from the [bold]IF Database (IFDB)[/bold],\n"
+        "filtered to only include files playable in [bold]Gargoyle[/bold] — a multi-interpreter\n"
+        "IF player supporting Z-machine, Glulx, TADS, Hugo, ADRIFT, and more.\n"
+    )
+    console.print("[bold]Here's how it works:[/bold]")
+    console.print("  1. Download and parse the IFDB SQL database dump (~50 MB compressed)")
+    console.print("  2. Build an in-memory index of all games, ratings, and download links")
+    console.print("  3. Walk you through three filters: format, rating, and genre")
+    console.print("  4. Show you a summary of how many games match before you commit")
+    console.print("  5. Download everything to a directory of your choice")
+    console.print()
+    console.print("[dim]Files are saved with their original names — no renaming.[/dim]")
+    console.print()
+
+
+# ---------------------------------------------------------------------------
+# Dump fetch
+# ---------------------------------------------------------------------------
+
+def find_dump_url() -> str:
+    console.print("[bold]Searching for the latest IFDB dump on IF Archive...[/bold]")
+    for url in DUMP_URL_CANDIDATES:
+        try:
+            response = requests.head(url, timeout=15, allow_redirects=True)
+            if response.status_code == 200:
+                console.print(f"  [green]✓[/green] Found: {url}")
+                return url
+            console.print(f"  [dim]{response.status_code}: {url}[/dim]")
+        except requests.RequestException as exc:
+            console.print(f"  [red]✗[/red] {exc}: {url}")
+    raise SystemExit(
+        "\nCould not auto-detect the IFDB dump URL. "
+        "Please check your internet connection and try again."
+    )
+
+
+def download_bytes(url: str, label: str) -> bytes:
+    response = requests.get(url, stream=True, timeout=120)
+    response.raise_for_status()
+    total = int(response.headers.get("content-length", 0))
+    buffer = io.BytesIO()
+    with tqdm(total=total or None, unit="B", unit_scale=True, desc=label) as bar:
+        for chunk in response.iter_content(chunk_size=65_536):
+            buffer.write(chunk)
+            bar.update(len(chunk))
+    return buffer.getvalue()
+
+
+def extract_sql_from_zip(zip_data: bytes) -> str:
+    with zipfile.ZipFile(io.BytesIO(zip_data)) as archive:
+        sql_names = [n for n in archive.namelist() if n.endswith(".sql")]
+        if not sql_names:
+            raise SystemExit("No .sql file found inside the IFDB dump zip.")
+        main = max(sql_names, key=lambda n: archive.getinfo(n).file_size)
+        console.print(f"Extracting [bold]{main}[/bold] ({archive.getinfo(main).file_size:,} bytes)...")
+        return archive.read(main).decode("utf-8", errors="replace")
+
+
+# ---------------------------------------------------------------------------
+# MySQL dump parser
+# ---------------------------------------------------------------------------
+
+def _parse_sql_value(raw: str) -> str | None:
+    stripped = raw.strip()
+    return None if stripped.upper() == "NULL" else stripped
+
+
+def parse_mysql_values(values_str: str) -> list[tuple[str | None, ...]]:
+    rows: list[tuple[str | None, ...]] = []
+    current_row: list[str | None] = []
+    token_chars: list[str] = []
+    in_string = False
+    depth = 0
+    i = 0
+    length = len(values_str)
+
+    while i < length:
+        char = values_str[i]
+
+        if in_string:
+            if char == "\\":
+                if i + 1 < length:
+                    token_chars.append(values_str[i + 1])
+                    i += 2
+                else:
+                    i += 1
+                continue
+            if char == "'":
+                if i + 1 < length and values_str[i + 1] == "'":
+                    token_chars.append("'")
+                    i += 2
+                    continue
+                in_string = False
+                i += 1
+                continue
+            token_chars.append(char)
+            i += 1
+            continue
+
+        if char == "'":
+            in_string = True
+            i += 1
+            continue
+
+        if char == "(":
+            depth += 1
+            if depth == 1:
+                current_row = []
+                token_chars = []
+            else:
+                token_chars.append(char)
+            i += 1
+            continue
+
+        if char == ")":
+            depth -= 1
+            if depth == 0:
+                current_row.append(_parse_sql_value("".join(token_chars)))
+                rows.append(tuple(current_row))
+                current_row = []
+                token_chars = []
+            else:
+                token_chars.append(char)
+            i += 1
+            continue
+
+        if char == "," and depth == 1:
+            current_row.append(_parse_sql_value("".join(token_chars)))
+            token_chars = []
+            i += 1
+            continue
+
+        if depth > 0:
+            token_chars.append(char)
+        i += 1
+
+    return rows
+
+
+def _extract_column_names(create_body: str) -> list[str]:
+    columns: list[str] = []
+    for match in re.finditer(r"^\s*`(\w+)`\s+\w", create_body, re.MULTILINE):
+        columns.append(match.group(1))
+    return columns
+
+
+def parse_dump(sql: str, tables_wanted: set[str]) -> dict[str, list[dict]]:
+    table_columns: dict[str, list[str]] = {}
+    table_data: dict[str, list[dict]] = {t: [] for t in tables_wanted}
+
+    console.print("Splitting dump into statements...")
+    statements = sql.split(";\n")
+    console.print(f"  {len(statements):,} statements found")
+
+    create_re = re.compile(r"CREATE\s+TABLE\s+`(\w+)`\s*\((.+)\)", re.DOTALL | re.IGNORECASE)
+    insert_re = re.compile(
+        r"INSERT\s+INTO\s+`(\w+)`(?:\s*\(([^)]+)\))?\s+VALUES\s*(.+)",
+        re.DOTALL | re.IGNORECASE,
+    )
+
+    for statement in tqdm(statements, desc="Parsing statements", unit="stmt"):
+        upper = statement.lstrip()[:20].upper()
+
+        if upper.startswith("CREATE"):
+            match = create_re.search(statement)
+            if match:
+                name = match.group(1)
+                if name in tables_wanted:
+                    table_columns[name] = _extract_column_names(match.group(2))
+
+        elif upper.startswith("INSERT"):
+            match = insert_re.search(statement)
+            if not match:
+                continue
+            name = match.group(1)
+            if name not in tables_wanted:
+                continue
+
+            if match.group(2):
+                columns = [c.strip().strip("`").strip('"') for c in match.group(2).split(",")]
+            else:
+                columns = table_columns.get(name, [])
+
+            if not columns:
+                continue
+
+            for row in parse_mysql_values(match.group(3)):
+                if len(row) == len(columns):
+                    table_data[name].append(dict(zip(columns, row)))
+
+    for table in tables_wanted:
+        cols = table_columns.get(table, [])
+        console.print(
+            f"  [bold]{table}[/bold]: {len(table_data[table]):,} rows  "
+            f"({', '.join(cols[:6])}{'...' if len(cols) > 6 else ''})"
+        )
+
+    return table_data
+
+
+# ---------------------------------------------------------------------------
+# URL utilities
+# ---------------------------------------------------------------------------
+
+def is_gargoyle_url(url: str) -> bool:
+    return Path(urlparse(url).path.lower()).suffix in GARGOYLE_EXTENSIONS
+
+
+def resolve_url(url: str) -> str:
+    return url if urlparse(url).scheme else urljoin(IFARCHIVE_BASE, url)
+
+
+def get_format_family(url: str) -> str | None:
+    ext = Path(urlparse(url).path.lower()).suffix
+    for family, extensions in FORMAT_FAMILIES.items():
+        if ext in extensions:
+            return family
+    return None
+
+
+def best_link(links: list[dict]) -> dict | None:
+    uncompressed = [
+        lnk for lnk in links
+        if is_gargoyle_url(lnk["url"])
+        and lnk.get("compression") in (None, "", "0", "false", "FALSE")
+    ]
+    if uncompressed:
+        return uncompressed[0]
+    compatible = [lnk for lnk in links if is_gargoyle_url(lnk["url"])]
+    return compatible[0] if compatible else None
+
+
+# ---------------------------------------------------------------------------
+# Index building
+# ---------------------------------------------------------------------------
+
+def build_indices(data: dict[str, list[dict]]) -> dict:
+    console.print("\n[bold]Building indices...[/bold]")
+
+    game_title: dict[str, str] = {}
+    game_author: dict[str, str] = {}
+    game_genre: dict[str, str] = {}
+
+    for row in data["games"]:
+        gid = row.get("id")
+        if not gid:
+            continue
+        game_title[gid] = row.get("title") or f"game_{gid}"
+        game_author[gid] = row.get("author") or ""
+        genre = (row.get("genre") or "").strip()
+        game_genre[gid] = genre if genre else "Uncategorised"
+
+    ratings_by_game: dict[str, list[float]] = defaultdict(list)
+    for row in data["reviews"]:
+        gid = row.get("gameid")
+        raw = row.get("rating")
+        if not gid or raw in (None, "0", "NULL", ""):
+            continue
+        try:
+            ratings_by_game[gid].append(float(raw))
+        except ValueError:
+            pass
+
+    raw_avg: dict[str, float] = {
+        gid: sum(rs) / len(rs) for gid, rs in ratings_by_game.items()
+    }
+
+    links_by_game: dict[str, list[dict]] = defaultdict(list)
+    for row in data["gamelinks"]:
+        gid = row.get("gameid")
+        url = row.get("url", "")
+        if not gid or not url:
+            continue
+        full_url = resolve_url(url)
+        if is_gargoyle_url(full_url):
+            links_by_game[gid].append({**row, "url": full_url})
+
+    all_gargoyle_ids: set[str] = set(links_by_game.keys())
+
+    game_family: dict[str, str] = {}
+    for gid in all_gargoyle_ids:
+        link = best_link(links_by_game[gid])
+        if link:
+            game_family[gid] = get_format_family(link["url"]) or "Unknown"
+
+    console.print(f"  Games in DB:                {len(game_title):,}")
+    console.print(f"  Games with ratings:         {len(ratings_by_game):,}")
+    console.print(f"  Games with Gargoyle links:  {len(all_gargoyle_ids):,}")
+
+    return {
+        "game_title": game_title,
+        "game_author": game_author,
+        "game_genre": game_genre,
+        "raw_avg": raw_avg,
+        "links_by_game": links_by_game,
+        "all_gargoyle_ids": all_gargoyle_ids,
+        "game_family": game_family,
+    }
+
+
+# ---------------------------------------------------------------------------
+# Filter helpers
+# ---------------------------------------------------------------------------
+
+RATING_KEYS = ["all", "rated", "≥ 2", "≥ 3", "≥ 4", "≥ 5"]
+
+RATING_LABELS: dict[str, str] = {
+    "all":    "All (including unrated)",
+    "rated":  "Any rated game (≥ 1 star)",
+    "≥ 2":    "≥ 2 stars",
+    "≥ 3":    "≥ 3 stars",
+    "≥ 4":    "≥ 4 stars",
+    "≥ 5":    "≥ 5 stars (perfect scores only)",
+}
+
+
+def count_by_format(indices: dict) -> dict[str, int]:
+    counts: dict[str, int] = defaultdict(int)
+    for gid in indices["all_gargoyle_ids"]:
+        family = indices["game_family"].get(gid, "Unknown")
+        counts[family] += 1
+    return dict(sorted(counts.items(), key=lambda kv: kv[1], reverse=True))
+
+
+def count_by_rating(indices: dict) -> dict[str, int]:
+    all_ids = indices["all_gargoyle_ids"]
+    raw_avg = indices["raw_avg"]
+    return {
+        "all":   len(all_ids),
+        "rated": sum(1 for gid in all_ids if gid in raw_avg),
+        "≥ 2":   sum(1 for gid in all_ids if raw_avg.get(gid, 0) >= 2),
+        "≥ 3":   sum(1 for gid in all_ids if raw_avg.get(gid, 0) >= 3),
+        "≥ 4":   sum(1 for gid in all_ids if raw_avg.get(gid, 0) >= 4),
+        "≥ 5":   sum(1 for gid in all_ids if raw_avg.get(gid, 0) >= 5),
+    }
+
+
+def count_by_genre(indices: dict) -> dict[str, int]:
+    counts: dict[str, int] = defaultdict(int)
+    for gid in indices["all_gargoyle_ids"]:
+        genre = indices["game_genre"].get(gid, "Uncategorised")
+        counts[genre] += 1
+    return dict(sorted(counts.items(), key=lambda kv: kv[1], reverse=True))
+
+
+def _passes_rating_filter(gid: str, raw_avg: dict[str, float], rating_key: str) -> bool:
+    if rating_key == "all":
+        return True
+    if rating_key == "rated":
+        return gid in raw_avg
+    threshold = float(rating_key.replace("≥ ", ""))
+    return raw_avg.get(gid, 0) >= threshold
+
+
+def apply_filters(
+    indices: dict,
+    selected_families: set[str],
+    rating_key: str,
+    selected_genres: set[str],
+) -> list[str]:
+    raw_avg = indices["raw_avg"]
+    result: list[str] = []
+    for gid in indices["all_gargoyle_ids"]:
+        if indices["game_family"].get(gid, "Unknown") not in selected_families:
+            continue
+        if not _passes_rating_filter(gid, raw_avg, rating_key):
+            continue
+        if indices["game_genre"].get(gid, "Uncategorised") not in selected_genres:
+            continue
+        result.append(gid)
+    return result
+
+
+# ---------------------------------------------------------------------------
+# TUI wizard steps
+# ---------------------------------------------------------------------------
+
+def ask_formats(indices: dict) -> set[str]:
+    format_counts = count_by_format(indices)
+
+    console.print()
+    console.print("[bold cyan]Step 1 of 3 — File Formats[/bold cyan]")
+    console.print(
+        "Select the formats you want to include. "
+        "[dim]All are pre-selected — uncheck any you don't want.[/dim]"
+    )
+    console.print()
+
+    choices = [
+        questionary.Choice(
+            title=f"{family}  ({count:,} games)",
+            value=family,
+            checked=True,
+        )
+        for family, count in format_counts.items()
+        if count > 0
+    ]
+
+    selected = questionary.checkbox("Formats to include:", choices=choices).ask()
+    if selected is None:
+        sys.exit(0)
+    if not selected:
+        console.print("[yellow]Nothing selected — defaulting to all formats.[/yellow]")
+        return set(format_counts.keys())
+    return set(selected)
+
+
+def ask_rating(indices: dict) -> str:
+    rating_counts = count_by_rating(indices)
+
+    console.print()
+    console.print("[bold cyan]Step 2 of 3 — Minimum Rating[/bold cyan]")
+    console.print(
+        "Choose the minimum average rating a game must have to be included.\n"
+        "[dim]Counts are independent of your format selection.[/dim]"
+    )
+    console.print()
+
+    choices = [
+        questionary.Choice(
+            title=f"{RATING_LABELS[key]}  ({rating_counts[key]:,} games)",
+            value=key,
+        )
+        for key in RATING_KEYS
+    ]
+
+    selected = questionary.select("Minimum rating:", choices=choices).ask()
+    if selected is None:
+        sys.exit(0)
+    return selected
+
+
+def ask_genres(indices: dict) -> set[str]:
+    genre_counts = count_by_genre(indices)
+
+    console.print()
+    console.print("[bold cyan]Step 3 of 3 — Genres[/bold cyan]")
+    console.print(
+        "Select the genres you want to include. "
+        "[dim]All are pre-selected — uncheck any you don't want.\n"
+        "Counts are independent of your format and rating selections.[/dim]"
+    )
+    console.print()
+
+    choices = [
+        questionary.Choice(
+            title=f"{genre}  ({count:,} games)",
+            value=genre,
+            checked=True,
+        )
+        for genre, count in genre_counts.items()
+        if count > 0
+    ]
+
+    selected = questionary.checkbox("Genres to include:", choices=choices).ask()
+    if selected is None:
+        sys.exit(0)
+    if not selected:
+        console.print("[yellow]Nothing selected — defaulting to all genres.[/yellow]")
+        return set(genre_counts.keys())
+    return set(selected)
+
+
+def show_filter_summary(
+    indices: dict,
+    selected_families: set[str],
+    rating_key: str,
+    selected_genres: set[str],
+) -> int:
+    format_counts = count_by_format(indices)
+    rating_counts = count_by_rating(indices)
+    genre_counts = count_by_genre(indices)
+
+    format_total = sum(format_counts.get(f, 0) for f in selected_families)
+    rating_total = rating_counts[rating_key]
+    genre_total = sum(genre_counts.get(g, 0) for g in selected_genres)
+    combined = apply_filters(indices, selected_families, rating_key, selected_genres)
+
+    if len(selected_families) <= 4:
+        families_label = ", ".join(sorted(selected_families))
+    else:
+        families_label = f"{len(selected_families)} formats selected"
+
+    if len(selected_genres) <= 3:
+        genres_label = ", ".join(sorted(selected_genres))
+    else:
+        genres_label = f"{len(selected_genres)} genres selected"
+
+    table = Table(title="Filter Summary", show_header=True, header_style="bold cyan")
+    table.add_column("Filter", style="bold")
+    table.add_column("Selection")
+    table.add_column("Matching games", justify="right")
+
+    table.add_row("Format", families_label, f"{format_total:,}")
+    table.add_row("Rating", RATING_LABELS[rating_key], f"{rating_total:,}")
+    table.add_row("Genre", genres_label, f"{genre_total:,}")
+    table.add_section()
+    table.add_row(
+        "[bold]Combined[/bold]",
+        "[dim]all three filters applied[/dim]",
+        f"[bold green]{len(combined):,}[/bold green]",
+    )
+
+    console.print()
+    console.print(table)
+    console.print()
+
+    return len(combined)
+
+
+def ask_output_path() -> Path:
+    console.print()
+
+    def validate_path(raw: str) -> bool | str:
+        if not raw.strip():
+            return "Please enter a path."
+        p = Path(raw.strip()).expanduser()
+        if p.exists() and not p.is_dir():
+            return f"{raw!r} exists and is not a directory."
+        return True
+
+    path_str = questionary.text(
+        "Where should the games be saved? (absolute path to a directory)",
+        validate=validate_path,
+    ).ask()
+    if path_str is None:
+        sys.exit(0)
+
+    output_dir = Path(path_str.strip()).expanduser().resolve()
+    output_dir.mkdir(parents=True, exist_ok=True)
+    return output_dir
+
+
+# ---------------------------------------------------------------------------
+# Download
+# ---------------------------------------------------------------------------
+
+def download_games(indices: dict, matching_ids: list[str], output_dir: Path) -> None:
+    console.print(f"\n[bold]Downloading {len(matching_ids):,} games to:[/bold] {output_dir}")
+    console.print()
+
+    errors: list[str] = []
+    skipped = 0
+    downloaded = 0
+
+    for gid in tqdm(matching_ids, desc="Downloading", unit="game"):
+        title = indices["game_title"].get(gid, f"game_{gid}")
+        link = best_link(indices["links_by_game"].get(gid, []))
+
+        if not link:
+            errors.append(f"{title}: no suitable download link")
+            continue
+
+        url = link["url"]
+        filename = unquote(Path(urlparse(url).path).name)
+        if not filename:
+            filename = f"game_{gid}" + Path(urlparse(url).path).suffix
+
+        filepath = output_dir / filename
+        if filepath.exists():
+            skipped += 1
+            continue
+
+        try:
+            response = requests.get(url, timeout=60, stream=True, headers=BROWSER_HEADERS)
+            response.raise_for_status()
+            with filepath.open("wb") as fh:
+                for chunk in response.iter_content(chunk_size=65_536):
+                    fh.write(chunk)
+            downloaded += 1
+        except requests.RequestException as exc:
+            errors.append(f"{title}: {exc}")
+            if filepath.exists():
+                filepath.unlink()
+
+    console.print()
+    console.print("[bold]━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━[/bold]")
+    console.print(f"[green]Downloaded:[/green]                {downloaded:,}")
+    console.print(f"[dim]Skipped (already present):[/dim]  {skipped:,}")
+    console.print(f"[red]Errors:[/red]                    {len(errors):,}")
+    console.print(f"[bold]Saved to:[/bold]                  {output_dir}")
+
+    if errors:
+        console.print(f"\n[red]First {min(20, len(errors))} errors:[/red]")
+        for msg in errors[:20]:
+            console.print(f"  {msg}")
+        if len(errors) > 20:
+            console.print(f"  ... and {len(errors) - 20} more")
+        error_log = output_dir / "download_errors.txt"
+        error_log.write_text("\n".join(errors), encoding="utf-8")
+        console.print(f"\n[dim]Full error log:[/dim] {error_log}")
+
+
+# ---------------------------------------------------------------------------
+# Main
+# ---------------------------------------------------------------------------
+
+def main() -> None:
+    show_welcome()
+
+    confirmed = questionary.confirm(
+        "Ready to fetch the IFDB database and get started?"
+    ).ask()
+    if not confirmed:
+        console.print("[dim]Bye! 👋[/dim]")
+        sys.exit(0)
+
+    console.print()
+    dump_url = find_dump_url()
+    console.print(f"\n[bold]Downloading:[/bold] {dump_url}")
+    zip_data = download_bytes(dump_url, "IFDB dump")
+
+    console.print("\n[bold]Extracting SQL from archive...[/bold]")
+    sql = extract_sql_from_zip(zip_data)
+    console.print(f"SQL text: {len(sql):,} characters")
+    del zip_data
+
+    console.print("\n[bold]Parsing database tables (this may take a minute)...[/bold]")
+    data = parse_dump(sql, {"games", "gamelinks", "reviews"})
+    del sql
+
+    indices = build_indices(data)
+    del data
+
+    # Filter wizard — loops if the user wants to edit
+    selected_families: set[str] = set()
+    rating_key: str = "all"
+    selected_genres: set[str] = set()
+
+    first_run = True
+    while True:
+        selected_families = ask_formats(indices)
+        rating_key = ask_rating(indices)
+        selected_genres = ask_genres(indices)
+
+        match_count = show_filter_summary(indices, selected_families, rating_key, selected_genres)
+
+        if match_count == 0:
+            console.print("[yellow]No games match your current filters — please adjust them.[/yellow]")
+            action = questionary.select(
+                "What would you like to do?",
+                choices=["Edit filters", "Quit"],
+            ).ask()
+            if action != "Edit filters":
+                sys.exit(0)
+            continue
+
+        action = questionary.select(
+            f"Download {match_count:,} matching games?",
+            choices=[
+                questionary.Choice(f"Yes — download all {match_count:,} games", value="download"),
+                questionary.Choice("Edit filters", value="edit"),
+                questionary.Choice("Quit", value="quit"),
+            ],
+        ).ask()
+
+        if action is None or action == "quit":
+            sys.exit(0)
+        if action == "edit":
+            continue
+        break
+
+    output_dir = ask_output_path()
+    matching_ids = apply_filters(indices, selected_families, rating_key, selected_genres)
+    download_games(indices, matching_ids, output_dir)
+
+
+if __name__ == "__main__":
+    main()