ModUI: Add application/xml to text handler

This ended up way fancier than I imagined.

README.rst

@@ -48,6 +48,50 @@ Before running the service for the first time and every time you update it
 from this git repository, run ``FLASK_APP=fhost flask db upgrade``.
 
 
+Moderation UI
+-------------
+
+.. image:: modui.webp
+  :height: 300
+
+0x0 features a TUI program for file moderation. With it, you can view a list
+of uploaded files, as well as extended information on them. It allows you to
+take actions like removing files temporarily or permanently, as well as
+blocking IP addresses and associated files.
+
+If a sufficiently recent version of python-mpv with libmpv is present and
+your terminal supports it, you also get graphical file previews, including
+video playback. Upstream mpv currently supports sixels and the
+`kitty graphics protocol <https://sw.kovidgoyal.net/kitty/graphics-protocol/>`_.
+For this to work, set the ``MOD_PREVIEW_PROTO`` option in ``instance/config.py``.
+
+Requirements:
+
+* `Textual <https://textual.textualize.io/>`_
+
+Optional:
+
+* `python-mpv <https://github.com/jaseg/python-mpv>`_
+  (graphical previews)
+* `PyAV <https://github.com/PyAV-Org/PyAV>`_
+  (information on multimedia files)
+* `PyMuPDF <https://github.com/pymupdf/PyMuPDF>`_
+  (previews and file information for PDF, XPS, EPUB, MOBI and FB2)
+* `libarchive-c <https://github.com/Changaco/python-libarchive-c>`_
+  (archive content listing)
+
+.. note::
+    `Mosh <https://mosh.org/>`_ currently does not support sixels or kitty graphics.
+
+.. hint::
+    You may need to set the ``COLORTERM`` environment variable to
+    ``truecolor``.
+
+.. tip::
+    Using compression with SSH (``-C`` option) can significantly
+    reduce the bandwidth requirements for graphics.
+
+
 NSFW Detection
 --------------
 

fhost.py

@@ -295,7 +295,7 @@ class File(db.Model):
         f.size = len(data)
 
         if not f.nsfw_score and app.config["NSFW_DETECT"]:
-            f.nsfw_score = nsfw.detect(p)
+            f.nsfw_score = nsfw.detect(str(p))
 
         db.session.add(f)
         db.session.commit()

instance/config.example.py

@@ -58,6 +58,17 @@ FHOST_MIN_EXPIRATION = 30  * 24 * 60 * 60 * 1000
 FHOST_MAX_EXPIRATION = 365 * 24 * 60 * 60 * 1000
 
 
+# This should be detected automatically when running behind a reverse proxy, but needs
+# to be set for URL resolution to work in e.g. the moderation UI.
+# SERVER_NAME = "example.com"
+
+
+# Specifies which graphics protocol to use for the media previews in the moderation UI.
+# Requires pympv with libmpv >= 0.36.0 and terminal support.
+# Available choices are "sixel" and "kitty".
+# MOD_PREVIEW_PROTO = "sixel"
+
+
 # Use the X-SENDFILE header to speed up serving files w/ compatible webservers
 #
 # Some webservers can be configured use the X-Sendfile header to handle sending

migrations/versions/939a08e1d6e5_.py

@@ -58,14 +58,19 @@ def upgrade():
         return # There are no currently unexpired files
 
     # Calculate an expiration date for all existing files
-    files = session.scalars(
+
+    q = session.scalars(
             sa.select(File)
             .where(
-                sa.not_(File.removed),
+                sa.not_(File.removed)
-                File.sha256.in_(unexpired_files)
             )
         )
     updates = [] # We coalesce updates to the database here
+
+    # SQLite has a hard limit on the number of variables so we
+    # need to do this the slow way
+    files = [f for f in q if f.sha256 in unexpired_files]
+
     for file in files:
         file_path = storage / file.sha256
         stat = os.stat(file_path)

mod.css

@@ -0,0 +1,56 @@
+#ftable {
+    width: 1fr;
+}
+
+#infopane {
+    width: 50%;
+    outline-top: hkey $primary;
+    background: $panel;
+}
+
+#finfo {
+    background: $boost;
+    height: 12;
+    width: 1fr;
+    box-sizing: content-box;
+}
+
+#mpv {
+    display: none;
+    height: 20%;
+    width: 1fr;
+    content-align: center middle;
+}
+
+#ftextlog {
+    height: 1fr;
+    width: 1fr;
+}
+
+#filter_container {
+    height: auto;
+    display: none;
+}
+
+#filter_label {
+    content-align: right middle;
+    height: 1fr;
+    width: 20%;
+    margin: 0 1 0 2;
+}
+
+#filter_input {
+    width: 1fr;
+}
+
+Notification {
+    dock: bottom;
+    layer: notification;
+    width: auto;
+    margin: 2 4;
+    padding: 1 2;
+    background: $background;
+    color: $text;
+    height: auto;
+
+}

mod.py

@@ -0,0 +1,279 @@
+#!/usr/bin/env python3
+
+from itertools import zip_longest
+from sys import stdout
+import time
+
+from textual.app import App, ComposeResult
+from textual.widgets import DataTable, Header, Footer, TextLog, Static, Input
+from textual.containers import Horizontal, Vertical
+from textual.screen import Screen
+from textual import log
+from rich.text import Text
+from jinja2.filters import do_filesizeformat
+
+from fhost import db, File, su, app as fhost_app, in_upload_bl
+from modui import *
+
+fhost_app.app_context().push()
+
+class NullptrMod(Screen):
+    BINDINGS = [
+        ("q", "quit_app", "Quit"),
+        ("f1", "filter(1, 'Lookup name:')", "Lookup name"),
+        ("f2", "filter(2, 'Filter IP address:')", "Filter IP"),
+        ("f3", "filter(3, 'Filter MIME Type:')", "Filter MIME"),
+        ("f4", "filter(4, 'Filter extension:')", "Filter Ext."),
+        ("f5", "refresh", "Refresh"),
+        ("f6", "filter_clear", "Clear filter"),
+        ("r", "remove_file(False)", "Remove file"),
+        ("ctrl+r", "remove_file(True)", "Ban file"),
+        ("p", "ban_ip(False)", "Ban IP"),
+        ("ctrl+p", "ban_ip(True)", "Nuke IP"),
+    ]
+
+    async def action_quit_app(self):
+        self.mpvw.shutdown()
+        await self.app.action_quit()
+
+    def action_refresh(self):
+        ftable = self.query_one("#ftable")
+        ftable.watch_query(None, None)
+
+    def action_filter_clear(self):
+        self.query_one("#filter_container").display = False
+        ftable = self.query_one("#ftable")
+        ftable.focus()
+        ftable.query = ftable.base_query
+
+    def action_filter(self, fcol: int, label: str):
+        self.query_one("#filter_label").update(label)
+        finput = self.query_one("#filter_input")
+        self.filter_col = fcol
+        self.query_one("#filter_container").display = True
+        finput.focus()
+        self._refresh_layout()
+
+        if self.current_file:
+            match fcol:
+                case 1: finput.value = ""
+                case 2: finput.value = self.current_file.addr
+                case 3: finput.value = self.current_file.mime
+                case 4: finput.value = self.current_file.ext
+
+    def on_input_submitted(self, message: Input.Submitted) -> None:
+        self.query_one("#filter_container").display = False
+        ftable = self.query_one("#ftable")
+        ftable.focus()
+
+        if len(message.value):
+            match self.filter_col:
+                case 1:
+                    try: ftable.query = ftable.base_query.filter(File.id == su.debase(message.value))
+                    except ValueError: pass
+                case 2: ftable.query = ftable.base_query.filter(File.addr == message.value)
+                case 3: ftable.query = ftable.base_query.filter(File.mime.like(message.value))
+                case 4: ftable.query = ftable.base_query.filter(File.ext.like(message.value))
+        else:
+            ftable.query = ftable.base_query
+
+    def action_remove_file(self, permanent: bool) -> None:
+        if self.current_file:
+            self.current_file.delete(permanent)
+            db.session.commit()
+            self.mount(Notification(f"{'Banned' if permanent else 'Removed'} file {self.current_file.getname()}"))
+            self.action_refresh()
+
+    def action_ban_ip(self, nuke: bool) -> None:
+        if self.current_file:
+            if not fhost_app.config["FHOST_UPLOAD_BLACKLIST"]:
+                self.mount(Notification("Failed: FHOST_UPLOAD_BLACKLIST not set!"))
+                return
+            else:
+                if in_upload_bl(self.current_file.addr):
+                    txt = f"{self.current_file.addr} is already banned"
+                else:
+                    with fhost_app.open_instance_resource(fhost_app.config["FHOST_UPLOAD_BLACKLIST"], "a") as bl:
+                        print(self.current_file.addr.lstrip("::ffff:"), file=bl)
+                    txt = f"Banned {self.current_file.addr}"
+
+                if nuke:
+                    tsize = 0
+                    trm = 0
+                    for f in File.query.filter(File.addr == self.current_file.addr):
+                        if f.getpath().is_file():
+                            tsize += f.size or f.getpath().stat().st_size
+                            trm += 1
+                        f.delete(True)
+                    db.session.commit()
+                    txt += f", removed {trm} {'files' if trm != 1 else 'file'} totaling {do_filesizeformat(tsize, True)}"
+            self.mount(Notification(txt))
+            self._refresh_layout()
+            ftable = self.query_one("#ftable")
+            ftable.watch_query(None, None)
+
+    def on_update(self) -> None:
+        stdout.write("\033[?25l")
+        stdout.flush()
+
+    def compose(self) -> ComposeResult:
+        yield Header()
+        yield Horizontal(
+            FileTable(id="ftable", zebra_stripes=True),
+            Vertical(
+                DataTable(id="finfo", show_header=False),
+                MpvWidget(id="mpv"),
+                TextLog(id="ftextlog"),
+            id="infopane"))
+        yield Horizontal(Static("Filter:", id="filter_label"), Input(id="filter_input"), id="filter_container")
+        yield Footer()
+
+    def on_mount(self) -> None:
+        self.current_file = None
+
+        self.ftable = self.query_one("#ftable")
+        self.ftable.focus()
+
+        self.finfo = self.query_one("#finfo")
+        self.finfo.add_columns("key", "value")
+
+        self.mpvw = self.query_one("#mpv")
+        self.ftlog = self.query_one("#ftextlog")
+
+        self.mimehandler = mime.MIMEHandler()
+        self.mimehandler.register(mime.MIMECategory.Archive, self.handle_libarchive)
+        self.mimehandler.register(mime.MIMECategory.Text, self.handle_text)
+        self.mimehandler.register(mime.MIMECategory.AV, self.handle_mpv)
+        self.mimehandler.register(mime.MIMECategory.Document, self.handle_mupdf)
+        self.mimehandler.register(mime.MIMECategory.Fallback, self.handle_libarchive)
+        self.mimehandler.register(mime.MIMECategory.Fallback, self.handle_mpv)
+        self.mimehandler.register(mime.MIMECategory.Fallback, self.handle_raw)
+
+    def handle_libarchive(self, cat):
+        import libarchive
+        with libarchive.file_reader(str(self.current_file.getpath())) as a:
+            self.ftlog.write("\n".join(e.path for e in a))
+        return True
+
+    def handle_text(self, cat):
+        with open(self.current_file.getpath(), "r") as sf:
+            data = sf.read(1000000).replace("\033","")
+            self.ftlog.write(data)
+        return True
+
+    def handle_mupdf(self, cat):
+        import fitz
+        with fitz.open(self.current_file.getpath(),
+                       filetype=self.current_file.ext.lstrip(".")) as doc:
+            p = doc.load_page(0)
+            pix = p.get_pixmap(dpi=72)
+            imgdata = pix.tobytes("ppm").hex()
+
+            self.mpvw.styles.height = "40%"
+            self.mpvw.start_mpv("hex://" + imgdata, 0)
+
+            self.ftlog.write(Text.from_markup(f"[bold]Pages:[/bold] {doc.page_count}"))
+            self.ftlog.write(Text.from_markup("[bold]Metadata:[/bold]"))
+            for k, v in doc.metadata.items():
+                self.ftlog.write(Text.from_markup(f"  [bold]{k}:[/bold] {v}"))
+            toc = doc.get_toc()
+            if len(toc):
+                self.ftlog.write(Text.from_markup("[bold]TOC:[/bold]"))
+                for lvl, title, page in toc:
+                    self.ftlog.write(f"{'  ' * lvl} {page}: {title}")
+        return True
+
+    def handle_mpv(self, cat):
+        if cat == mime.MIMECategory.AV or self.current_file.nsfw_score >= 0:
+            self.mpvw.styles.height = "20%"
+            self.mpvw.start_mpv(str(self.current_file.getpath()), 0)
+
+            import av
+            with av.open(str(self.current_file.getpath())) as c:
+                self.ftlog.write(Text("Format:", style="bold"))
+                self.ftlog.write(f"  {c.format.long_name}")
+                if len(c.metadata):
+                    self.ftlog.write(Text("Metadata:", style="bold"))
+                    for k, v in c.metadata.items():
+                        self.ftlog.write(f"  {k}: {v}")
+                    for s in c.streams:
+                        self.ftlog.write(Text(f"Stream {s.index}:", style="bold"))
+                        self.ftlog.write(f"  Type: {s.type}")
+                        if s.base_rate:
+                            self.ftlog.write(f"  Frame rate: {s.base_rate}")
+                        if len(s.metadata):
+                            self.ftlog.write(Text("  Metadata:", style="bold"))
+                            for k, v in s.metadata.items():
+                                self.ftlog.write(f"    {k}: {v}")
+            return True
+        return False
+
+    def handle_raw(self, cat):
+        def hexdump(binf, length):
+            def fmt(s):
+                if isinstance(s, str):
+                    c = chr(int(s, 16))
+                else:
+                    c = chr(s)
+                    s = c
+                if c.isalpha(): return f"\0[chartreuse1]{s}\0[/chartreuse1]"
+                if c.isdigit(): return f"\0[gold1]{s}\0[/gold1]"
+                if not c.isprintable():
+                    g = "grey50" if c == "\0" else "cadet_blue"
+                    return f"\0[{g}]{s if len(s) == 2 else '.'}\0[/{g}]"
+                return s
+            return Text.from_markup("\n".join(f"{' '.join(map(fmt, map(''.join, zip(*[iter(c.hex())] * 2))))}"
+                                    f"{'   ' * (16 - len(c))}"
+                                    f" {''.join(map(fmt, c))}"
+                                    for c in map(lambda x: bytes([n for n in x if n != None]),
+                                                zip_longest(*[iter(binf.read(min(length, 16 * 10)))] * 16))))
+
+        with open(self.current_file.getpath(), "rb") as binf:
+            self.ftlog.write(hexdump(binf, self.current_file.size))
+            if self.current_file.size > 16*10*2:
+                binf.seek(self.current_file.size-16*10)
+                self.ftlog.write("  [...]  ".center(64, '─'))
+            self.ftlog.write(hexdump(binf, self.current_file.size - binf.tell()))
+
+        return True
+
+    def on_file_table_selected(self, message: FileTable.Selected) -> None:
+        f = message.file
+        self.current_file = f
+        self.finfo.clear()
+        self.finfo.add_rows([
+            ("ID:", str(f.id)),
+            ("File name:", f.getname()),
+            ("URL:", f.geturl() if fhost_app.config["SERVER_NAME"] else "⚠ Set SERVER_NAME in config.py to display"),
+            ("File size:", do_filesizeformat(f.size, True)),
+            ("MIME type:", f.mime),
+            ("SHA256 checksum:", f.sha256),
+            ("Uploaded by:", Text(f.addr)),
+            ("Management token:", f.mgmt_token),
+            ("Secret:", f.secret),
+            ("Is NSFW:", ("Yes" if f.is_nsfw else "No") + f" (Score: {f.nsfw_score:0.4f})"),
+            ("Is banned:", "Yes" if f.removed else "No"),
+            ("Expires:", time.strftime("%Y-%m-%d %H:%M:%S", time.gmtime(File.get_expiration(f.expiration, f.size)/1000)))
+        ])
+
+        self.mpvw.stop_mpv(True)
+        self.ftlog.remove()
+        self.query_one("#infopane").mount(TextLog(id="ftextlog"))
+        self.ftlog = self.query_one("#ftextlog")
+
+        if f.getpath().is_file():
+            self.mimehandler.handle(f.mime, f.ext)
+            self.ftlog.scroll_home(animate=False)
+
+class NullptrModApp(App):
+    CSS_PATH = "mod.css"
+
+    def on_mount(self) -> None:
+        self.title = "0x0 File Moderation Interface"
+        self.main_screen = NullptrMod()
+        self.install_screen(self.main_screen, name="main")
+        self.push_screen("main")
+
+if __name__ == "__main__":
+    app = NullptrModApp()
+    app.run()

modui/__init__.py

@@ -0,0 +1,3 @@
+from .filetable import FileTable
+from .notification import Notification
+from .mpvwidget import MpvWidget

modui/filetable.py

@@ -0,0 +1,72 @@
+from textual.widgets import DataTable, Static
+from textual.reactive import Reactive
+from textual.message import Message, MessageTarget
+from textual import events, log
+from jinja2.filters import do_filesizeformat
+
+from fhost import File
+from modui import mime
+
+class FileTable(DataTable):
+    query = Reactive(None)
+    order_col = Reactive(0)
+    order_desc = Reactive(True)
+    limit = 10000
+    colmap = [File.id, File.removed, File.nsfw_score, None, File.ext, File.size, File.mime]
+
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+        self.add_columns("#", "☣️", "🔞", "📂", "name", "size", "mime")
+        self.base_query = File.query.filter(File.size != None)
+        self.query = self.base_query
+
+    class Selected(Message):
+        def __init__(self, sender: MessageTarget, f: File) -> None:
+            self.file = f
+            super().__init__(sender)
+
+    def watch_order_col(self, old, value) -> None:
+        self.watch_query(None, None)
+
+    def watch_order_desc(self, old, value) -> None:
+        self.watch_query(None, None)
+
+    def watch_query(self, old, value) -> None:
+        def fmt_file(f: File) -> tuple:
+            return (
+                str(f.id),
+                "🔴" if f.removed else "  ",
+                "🚩" if f.is_nsfw else "  ",
+                "👻" if not f.getpath().is_file() else "  ",
+                f.getname(),
+                do_filesizeformat(f.size, True),
+                f"{mime.mimemoji.get(f.mime.split('/')[0], mime.mimemoji.get(f.mime)) or '  '} " + f.mime,
+            )
+
+        if (self.query):
+            self.clear()
+            order = FileTable.colmap[self.order_col]
+            q = self.query
+            if order: q = q.order_by(order.desc() if self.order_desc else order, File.id)
+            self.add_rows(map(fmt_file, q.limit(self.limit)))
+
+    def _scroll_cursor_in_to_view(self, animate: bool = False) -> None:
+        region = self._get_cell_region(self.cursor_row, 0)
+        spacing = self._get_cell_border()
+        self.scroll_to_region(region, animate=animate, spacing=spacing)
+
+    async def watch_cursor_cell(self, old, value) -> None:
+        super().watch_cursor_cell(old, value)
+        if value[0] < len(self.data) and value[0] >= 0:
+            f = File.query.get(int(self.data[value[0]][0]))
+            await self.emit(self.Selected(self, f))
+
+    def on_click(self, event: events.Click) -> None:
+        super().on_click(event)
+        meta = self.get_style_at(event.x, event.y).meta
+        if meta:
+            if meta["row"] == -1:
+                qi = FileTable.colmap[meta["column"]]
+                if meta["column"] == self.order_col:
+                    self.order_desc = not self.order_desc
+                self.order_col = meta["column"]

modui/mime.py

@@ -0,0 +1,126 @@
+from enum import Enum
+from textual import log
+
+mimemoji = {
+    "audio" : "🔈",
+    "video" : "🎞",
+    "text"  : "📄",
+    "image" : "🖼",
+    "application/zip" : "🗜️",
+    "application/x-zip-compressed" : "🗜️",
+    "application/x-tar" : "🗄",
+    "application/x-cpio" : "🗄",
+    "application/x-xz" : "🗜️",
+    "application/x-7z-compressed" : "🗜️",
+    "application/gzip" : "🗜️",
+    "application/zstd" : "🗜️",
+    "application/x-rar" : "🗜️",
+    "application/x-rar-compressed" : "🗜️",
+    "application/vnd.ms-cab-compressed" : "🗜️",
+    "application/x-bzip2" : "🗜️",
+    "application/x-lzip" : "🗜️",
+    "application/x-iso9660-image" : "💿",
+    "application/pdf" : "📕",
+    "application/epub+zip" : "📕",
+    "application/mxf" : "🎞",
+    "application/vnd.android.package-archive" : "📦",
+    "application/vnd.debian.binary-package" : "📦",
+    "application/x-rpm" : "📦",
+    "application/x-dosexec" : "⚙",
+    "application/x-execuftable" : "⚙",
+    "application/x-sharedlib" : "⚙",
+    "application/java-archive" : "☕",
+    "application/x-qemu-disk" : "🖴",
+    "application/pgp-encrypted" : "🔏",
+}
+
+MIMECategory = Enum("MIMECategory",
+    ["Archive", "Text", "AV", "Document", "Fallback"]
+)
+
+class MIMEHandler:
+    def __init__(self):
+        self.handlers = {
+            MIMECategory.Archive : [[
+                "application/zip",
+                "application/x-zip-compressed",
+                "application/x-tar",
+                "application/x-cpio",
+                "application/x-xz",
+                "application/x-7z-compressed",
+                "application/gzip",
+                "application/zstd",
+                "application/x-rar",
+                "application/x-rar-compressed",
+                "application/vnd.ms-cab-compressed",
+                "application/x-bzip2",
+                "application/x-lzip",
+                "application/x-iso9660-image",
+                "application/vnd.android.package-archive",
+                "application/vnd.debian.binary-package",
+                "application/x-rpm",
+                "application/java-archive",
+                "application/vnd.openxmlformats"
+            ], []],
+            MIMECategory.Text : [[
+                "text",
+                "application/json",
+                "application/xml",
+            ], []],
+            MIMECategory.AV : [[
+                "audio", "video", "image",
+                "application/mxf"
+            ], []],
+            MIMECategory.Document : [[
+                "application/pdf",
+                "application/epub",
+                "application/x-mobipocket-ebook",
+            ], []],
+            MIMECategory.Fallback : [[], []]
+        }
+
+        self.exceptions = {
+            MIMECategory.Archive : {
+                ".cbz" : MIMECategory.Document,
+                ".xps" : MIMECategory.Document,
+                ".epub" : MIMECategory.Document,
+            },
+            MIMECategory.Text : {
+                ".fb2" : MIMECategory.Document,
+            }
+        }
+
+    def register(self, category, handler):
+        self.handlers[category][1].append(handler)
+
+    def handle(self, mime, ext):
+        def getcat(s):
+            cat = MIMECategory.Fallback
+            for k, v in self.handlers.items():
+                s = s.split(";")[0]
+                if s in v[0] or s.split("/")[0] in v[0]:
+                    cat = k
+                    break
+
+                for x in v[0]:
+                    if s.startswith(x):
+                        cat = k
+                        break
+
+            if cat in self.exceptions:
+                cat = self.exceptions[cat].get(ext) or cat
+
+            return cat
+
+        cat = getcat(mime)
+        for handler in self.handlers[cat][1]:
+            try:
+                if handler(cat): return
+            except: pass
+
+        for handler in self.handlers[MIMECategory.Fallback][1]:
+            try:
+                if handler(None): return
+            except: pass
+
+        raise RuntimeError(f"Unhandled MIME type category: {cat}")

modui/mpvwidget.py

@@ -0,0 +1,88 @@
+import time
+import fcntl, struct, termios
+from sys import stdout
+
+from textual import events, log
+from textual.widgets import Static
+
+from fhost import app as fhost_app
+
+class MpvWidget(Static):
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+
+        self.mpv = None
+        self.vo = fhost_app.config.get("MOD_PREVIEW_PROTO")
+
+        if not self.vo in ["sixel", "kitty"]:
+            self.update("⚠ Previews not enabled. \n\nSet MOD_PREVIEW_PROTO to 'sixel' or 'kitty' in config.py,\nwhichever is supported by your terminal.")
+        else:
+            try:
+                import mpv
+                self.mpv = mpv.MPV()
+                self.mpv.profile = "sw-fast"
+                self.mpv["vo"] = self.vo
+                self.mpv[f"vo-{self.vo}-config-clear"] = False
+                self.mpv[f"vo-{self.vo}-alt-screen"] = False
+                self.mpv[f"vo-sixel-buffered"] = True
+                self.mpv["audio"] = False
+                self.mpv["loop-file"] = "inf"
+                self.mpv["image-display-duration"] = 0.5 if self.vo == "sixel" else "inf"
+            except Exception as e:
+                self.mpv = None
+                self.update(f"⚠ Previews require python-mpv with libmpv 0.36.0 or later \n\nError was:\n{type(e).__name__}: {e}")
+
+    def start_mpv(self, f: str|None = None, pos: float|str|None = None) -> None:
+        self.display = True
+        self.screen._refresh_layout()
+
+        if self.mpv:
+            if self.content_region.x:
+                r, c, w, h = struct.unpack('hhhh', fcntl.ioctl(0, termios.TIOCGWINSZ, '12345678'))
+                width = int((w / c) * self.content_region.width)
+                height = int((h / r) * (self.content_region.height + (1 if self.vo == "sixel" else 0)))
+                self.mpv[f"vo-{self.vo}-left"] = self.content_region.x + 1
+                self.mpv[f"vo-{self.vo}-top"] = self.content_region.y + 1
+                self.mpv[f"vo-{self.vo}-rows"] = self.content_region.height + (1 if self.vo == "sixel" else 0)
+                self.mpv[f"vo-{self.vo}-cols"] = self.content_region.width
+                self.mpv[f"vo-{self.vo}-width"] = width
+                self.mpv[f"vo-{self.vo}-height"] = height
+
+                if pos != None:
+                    self.mpv["start"] = pos
+
+                if f:
+                    self.mpv.loadfile(f)
+                else:
+                    self.mpv.playlist_play_index(0)
+
+    def stop_mpv(self, wait: bool = False) -> None:
+        if self.mpv:
+            if not self.mpv.idle_active:
+                self.mpv.stop(True)
+                if wait:
+                    time.sleep(0.1)
+        self.clear_mpv()
+        self.display = False
+
+    def on_resize(self, size) -> None:
+        if self.mpv:
+            if not self.mpv.idle_active:
+                t = self.mpv.time_pos
+                self.stop_mpv()
+                if t:
+                    self.mpv["start"] = t
+                self.start_mpv()
+
+    def clear_mpv(self) -> None:
+        if self.vo == "kitty":
+            stdout.write("\033_Ga=d;\033\\")
+            stdout.flush()
+
+    def shutdown(self) -> None:
+        if self.mpv:
+            self.mpv.stop()
+            del self.mpv
+            if self.vo == "kitty":
+                stdout.write("\033_Ga=d;\033\\\033[?25l")
+                stdout.flush()

modui/notification.py

@@ -0,0 +1,8 @@
+from textual.widgets import Static
+
+class Notification(Static):
+    def on_mount(self) -> None:
+        self.set_timer(3, self.remove)
+
+    def on_click(self) -> None:
+        self.remove()

requirements.txt

@@ -1,10 +1,25 @@
+click
+Flask_Migrate
+validators
 alembic
+requests
 Jinja2
 Flask
-numpy
+flask_sqlalchemy
-SQLAlchemy
-requests
-Flask_SQLAlchemy
-validators
-flask_migrate
 python_magic
+
+# vscan
+clamd
+
+# nsfw detection
+numpy
+
+# mod ui
+av
+PyMuPDF
+libarchive_c
+textual
+python-mpv
+
+# dev
+pytest