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| -rw-r--r-- | crates/yt_dlp/src/options.rs | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/crates/yt_dlp/src/options.rs b/crates/yt_dlp/src/options.rs new file mode 100644 index 0000000..ad30301 --- /dev/null +++ b/crates/yt_dlp/src/options.rs @@ -0,0 +1,207 @@ +// yt - A fully featured command line YouTube client +// +// Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de> +// SPDX-License-Identifier: GPL-3.0-or-later +// +// This file is part of Yt. +// +// You should have received a copy of the License along with this program. +// If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>. + +use std::sync; + +use pyo3::{ + Bound, IntoPyObjectExt, PyAny, PyResult, Python, intern, + types::{PyAnyMethods, PyCFunction, PyDict, PyTuple}, +}; +use pyo3_pylogger::setup_logging; + +use crate::{ + YoutubeDL, json_loads, post_processors, py_kw_args, + python_error::{IntoPythonError, PythonError}, +}; + +pub type ProgressHookFunction = fn(py: Python<'_>) -> PyResult<Bound<'_, PyCFunction>>; +pub type PostProcessorFunction = fn(py: Python<'_>) -> PyResult<Bound<'_, PyAny>>; + +/// Options, that are used to customize the download behaviour. +/// +/// In the future, this might get a Builder api. +/// +/// See `help(yt_dlp.YoutubeDL())` from python for a full list of available options. +#[derive(Default, Debug)] +pub struct YoutubeDLOptions { + options: serde_json::Map<String, serde_json::Value>, + progress_hook: Option<ProgressHookFunction>, + post_processors: Vec<PostProcessorFunction>, +} + +impl YoutubeDLOptions { + #[must_use] + pub fn new() -> Self { + let me = Self { + options: serde_json::Map::new(), + progress_hook: None, + post_processors: vec![], + }; + + me.with_post_processor(post_processors::dearrow::process) + } + + #[must_use] + pub fn set(self, key: impl Into<String>, value: impl Into<serde_json::Value>) -> Self { + let mut options = self.options; + options.insert(key.into(), value.into()); + + Self { options, ..self } + } + + #[must_use] + pub fn with_progress_hook(self, progress_hook: ProgressHookFunction) -> Self { + if let Some(_previous_hook) = self.progress_hook { + todo!() + } else { + Self { + progress_hook: Some(progress_hook), + ..self + } + } + } + + #[must_use] + pub fn with_post_processor(mut self, pp: PostProcessorFunction) -> Self { + self.post_processors.push(pp); + self + } + + /// # Errors + /// If the underlying [`YoutubeDL::from_options`] errors. + pub fn build(self) -> Result<YoutubeDL, build::Error> { + YoutubeDL::from_options(self) + } + + #[must_use] + pub fn from_json_options(options: serde_json::Map<String, serde_json::Value>) -> Self { + Self { + options, + ..Self::new() + } + } + + #[must_use] + pub fn get(&self, key: &str) -> Option<&serde_json::Value> { + self.options.get(key) + } +} + +impl YoutubeDL { + /// Construct this instance from options. + /// + /// # Panics + /// If `yt_dlp` changed their interface. + /// + /// # Errors + /// If a python call fails. + #[allow(clippy::too_many_lines)] + pub fn from_options(options: YoutubeDLOptions) -> Result<Self, build::Error> { + pyo3::prepare_freethreaded_python(); + + let output_options = options.options.clone(); + + let yt_dlp_module = Python::with_gil(|py| { + let opts = json_loads(options.options, py); + + { + static CALL_ONCE: sync::Once = sync::Once::new(); + + CALL_ONCE.call_once(|| { + py.run( + c" +import signal +signal.signal(signal.SIGINT, signal.SIG_DFL) + ", + None, + None, + ) + .unwrap_or_else(|err| { + panic!("Failed to disable python signal handling: {err}") + }); + }); + } + + { + // Setup the progress hook + if let Some(ph) = options.progress_hook { + opts.set_item(intern!(py, "progress_hooks"), vec![ph(py).wrap_exc(py)?]) + .wrap_exc(py)?; + } + } + + { + // Unconditionally set a logger. + // Otherwise, yt_dlp will log to stderr. + + let ytdl_logger = setup_logging(py, "yt_dlp").wrap_exc(py)?; + + opts.set_item(intern!(py, "logger"), ytdl_logger) + .wrap_exc(py)?; + } + + let inner = { + let p_params = opts.into_bound_py_any(py).wrap_exc(py)?; + let p_auto_init = true.into_bound_py_any(py).wrap_exc(py)?; + + py.import(intern!(py, "yt_dlp.YoutubeDL")) + .wrap_exc(py)? + .getattr(intern!(py, "YoutubeDL")) + .wrap_exc(py)? + .call1( + PyTuple::new( + py, + [ + p_params.into_bound_py_any(py).wrap_exc(py)?, + p_auto_init.into_bound_py_any(py).wrap_exc(py)?, + ], + ) + .wrap_exc(py)?, + ) + .wrap_exc(py)? + }; + + { + // Setup the post processors + let add_post_processor_fun = inner + .getattr(intern!(py, "add_post_processor")) + .wrap_exc(py)?; + + for pp in options.post_processors { + add_post_processor_fun + .call( + (pp(py).wrap_exc(py)?.into_bound_py_any(py).wrap_exc(py)?,), + // "when" can take any value in yt_dlp.utils.POSTPROCESS_WHEN + py_kw_args!(py => when = "pre_process"), + ) + .wrap_exc(py)?; + } + } + + Ok::<_, PythonError>(inner.unbind()) + })?; + + Ok(Self { + inner: yt_dlp_module, + options: output_options, + }) + } +} + +#[allow(missing_docs)] +pub mod build { + use crate::python_error::PythonError; + + #[derive(Debug, thiserror::Error)] + pub enum Error { + #[error(transparent)] + Python(#[from] PythonError), + } +} |