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use std::{
collections::HashSet,
fmt::Display,
fs::{self, read_to_string, File},
io::Write,
path::PathBuf,
process::Command,
str::FromStr,
};
use anyhow::{bail, Context, Result};
use url::Url;
use walkdir::WalkDir;
pub mod handle;
pub use handle::handle;
#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct NoWhitespaceString(String);
impl NoWhitespaceString {
/// # Panics
/// If the input contains whitespace.
#[must_use]
pub fn new(input: String) -> Self {
if input.contains(' ') {
panic!("Your input '{input}' contains whitespace. I did not expect that.")
} else {
Self(input)
}
}
}
impl Display for NoWhitespaceString {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
self.0.fmt(f)
}
}
impl NoWhitespaceString {
#[must_use]
pub fn as_str(&self) -> &str {
&self.0
}
}
#[derive(Debug, Clone)]
pub struct Input {
url: Url,
tags: HashSet<NoWhitespaceString>,
}
impl FromStr for Input {
type Err = anyhow::Error;
fn from_str(s: &str) -> std::result::Result<Self, Self::Err> {
if s.contains(' ') {
let (url, tags) = s.split_once(' ').expect("Should work");
Ok(Self {
url: Url::from_str(url)?,
tags: {
tags.trim()
.split(' ')
.map(|tag| {
if let Some(tag) = tag.strip_prefix('+') {
Ok(NoWhitespaceString::new(tag.to_owned()))
} else {
bail!("Your tag '{tag}' does not start with the required '+'");
}
})
.collect::<Result<_, _>>()?
},
})
} else {
Ok(Self {
url: Url::from_str(s)?,
tags: HashSet::new(),
})
}
}
}
impl Display for Input {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
if self.tags.is_empty() {
self.url.fmt(f)
} else {
write!(
f,
"{} {}",
self.url,
self.tags
.iter()
.fold(String::new(), |mut acc, tag| {
acc.push('+');
acc.push_str(tag.as_str());
acc.push(' ');
acc
})
.trim()
)
}
}
}
impl Input {
fn base_path() -> PathBuf {
dirs::data_local_dir()
.expect("This should be set")
.join("tskm/inputs")
}
fn url_path(url: &Url) -> Result<PathBuf> {
let base_path = Self::base_path();
let url_path = base_path.join(url.to_string());
fs::create_dir_all(&url_path)
.with_context(|| format!("Failed to open file: '{}'", url_path.display()))?;
Ok(url_path.join("url_value"))
}
#[must_use]
pub fn url(&self) -> &Url {
&self.url
}
/// Commit this constructed [`Input`] to storage.
///
/// # Errors
/// If IO operations fail.
pub fn commit(&self) -> Result<()> {
let url_path = Self::url_path(&self.url)?;
let url_content = {
if url_path.exists() {
read_to_string(&url_path)?
} else {
String::new()
}
};
let mut file = File::create(&url_path)
.with_context(|| format!("Failed to open file: '{}'", url_path.display()))?;
writeln!(file, "{url_content}{self}")?;
Self::git_commit(&format!("Add new url: '{self}'"))?;
Ok(())
}
/// Remove this constructed [`Input`] to storage.
///
/// Beware that this does not take tags into account.
///
/// # Errors
/// If IO operations fail.
pub fn remove(&self) -> Result<()> {
let url_path = Self::url_path(&self.url)?;
fs::remove_file(&url_path)
.with_context(|| format!("Failed to remove file: '{}'", url_path.display()))?;
let mut url_path = url_path.as_path();
while let Some(parent) = url_path.parent() {
if fs::read_dir(parent)?.count() == 0 {
fs::remove_dir(parent)?;
}
url_path = parent;
}
Self::git_commit(&format!("Remove url: '{self}'"))?;
Ok(())
}
/// Commit your changes
fn git_commit(message: &str) -> Result<()> {
let status = Command::new("git")
.args(["add", "."])
.current_dir(Self::base_path())
.status()?;
if !status.success() {
bail!("Git add . failed!");
}
let status = Command::new("git")
.args(["commit", "--message", message, "--no-gpg-sign"])
.current_dir(Self::base_path())
.status()?;
if !status.success() {
bail!("Git commit failed!");
}
Ok(())
}
/// Get all previously [`Self::commit`]ed inputs.
///
/// # Errors
/// When IO handling fails.
///
/// # Panics
/// If internal assertions fail.
pub fn all() -> Result<Vec<Self>> {
let mut output = vec![];
for entry in WalkDir::new(Self::base_path())
.min_depth(1)
.into_iter()
.filter_entry(|e| {
let s = e.file_name().to_str();
s != Some(".git")
})
{
let entry = entry?;
if !entry.file_type().is_file() {
continue;
}
let url_value_file = entry
.path()
.to_str()
.expect("All of these should be URLs and thus valid strings");
assert!(url_value_file.ends_with("/url_value"));
let url = {
let base = url_value_file
.strip_prefix(&format!("{}/", Self::base_path().display()))
.expect("This will exist");
let (proto, path) = base.split_once(':').expect("This will countain a :");
let path = path.strip_suffix("/url_value").expect("Will exist");
Url::from_str(&format!("{proto}:/{path}"))
.expect("This was a URL, it should still be one")
};
let tags = {
let url_values = read_to_string(PathBuf::from(url_value_file))?;
url_values
.lines()
.map(|line| {
let input = Self::from_str(line)?;
Ok::<_, anyhow::Error>(input.tags)
})
.collect::<Result<Vec<HashSet<NoWhitespaceString>>, _>>()?
.into_iter()
.flatten()
.collect()
};
output.push(Self { url, tags });
}
Ok(output)
}
}
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