Moved the entire Kittybox tree into the root

1 files changed, 123 insertions, 0 deletions

diff --git a/util/src/lib.rs b/util/src/lib.rs
new file mode 100644
index 0000000..c49bdf5
--- /dev/null
+++ b/util/src/lib.rs
@@ -0,0 +1,123 @@
+#![warn(missing_docs)]
+//! Small things that couldn't fit elsewhere in Kittybox, yet may be
+//! useful on their own or in multiple Kittybox crates.
+//!
+//! Some things are gated behind features, namely:
+//!  - `fs` - enables use of filesystem-related utilities
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, Serialize, Deserialize)]
+pub struct IndiewebEndpoints {
+    pub authorization_endpoint: String,
+    pub token_endpoint: String,
+    pub webmention: Option<String>,
+    pub microsub: Option<String>,
+}
+
+/// Data structure representing a Micropub channel in the ?q=channels output.
+#[derive(Serialize, Deserialize, PartialEq, Debug)]
+#[cfg_attr(feature = "sqlx", derive(sqlx::FromRow))]
+pub struct MicropubChannel {
+    /// The channel's UID. It is usually also a publically accessible permalink URL.
+    pub uid: String,
+    /// The channel's user-friendly name used to recognize it in lists.
+    pub name: String,
+}
+
+#[derive(Debug, Default)]
+/// Common types of webmentions.
+pub enum MentionType {
+    /// Corresponds to a `u-in-reply-to` link.
+    Reply,
+    /// Corresponds to a `u-like-of` link.
+    Like,
+    /// Corresponds to a `u-repost-of` link.
+    Repost,
+    /// Corresponds to a `u-bookmark-of` link.
+    Bookmark,
+    /// A plain link without MF2 annotations.
+    #[default]
+    Mention
+}
+
+/// Common errors from the IndieWeb protocols that can be reused between modules.
+pub mod error;
+pub use error::{ErrorType, MicropubError};
+
+/// Common data-types useful in creating smart authentication systems.
+pub mod auth {
+    #[derive(PartialEq, Eq, Hash, Clone, Copy)]
+    pub enum EnrolledCredential {
+        /// An indicator that a password is enrolled. Passwords can be
+        /// used to recover from a lost token.
+        Password,
+        /// An indicator that one or more WebAuthn credentials were
+        /// enrolled.
+        WebAuthn
+    }
+}
+
+/// A collection of traits for implementing a robust job queue.
+pub mod queue;
+
+#[cfg(feature = "fs")]
+/// Commonly-used operations with the file system in Kittybox's
+/// underlying storage mechanisms.
+pub mod fs {
+    use std::io::{self, Result};
+    use std::path::{Path, PathBuf};
+    use rand::{Rng, distributions::Alphanumeric};
+    use tokio::fs;
+
+    /// Create a temporary file named `temp.[a-zA-Z0-9]{length}` in
+    /// the given location and immediately open it. Returns the
+    /// filename and the corresponding file handle. It is the caller's
+    /// responsibility to clean up the temporary file when it is no
+    /// longer needed.
+    ///
+    /// Uses [`OpenOptions::create_new`][fs::OpenOptions::create_new]
+    /// to detect filename collisions, in which case it will
+    /// automatically retry until the operation succeeds.
+    ///
+    /// # Errors
+    ///
+    /// Returns the underlying [`io::Error`] if the operation fails
+    /// due to reasons other than filename collision.
+    pub async fn mktemp<T, B>(dir: T, basename: B, length: usize) -> Result<(PathBuf, fs::File)>
+    where
+        T: AsRef<Path>,
+        B: Into<Option<&'static str>>
+    {
+        let dir = dir.as_ref();
+        let basename = basename.into().unwrap_or("");
+        fs::create_dir_all(dir).await?;
+
+        loop {
+            let filename = dir.join(format!(
+                "{}{}{}",
+                basename,
+                if basename.is_empty() { "" } else { "." },
+                {
+                    let string = rand::thread_rng()
+                        .sample_iter(&Alphanumeric)
+                        .take(length)
+                        .collect::<Vec<u8>>();
+                    String::from_utf8(string).unwrap()
+                }
+            ));
+
+            match fs::OpenOptions::new()
+                .create_new(true)
+                .write(true)
+                .open(&filename)
+                .await
+            {
+                Ok(file) => return Ok((filename, file)),
+                Err(err) => match err.kind() {
+                    io::ErrorKind::AlreadyExists => continue,
+                    _ => return Err(err)
+                }
+            }
+        }
+    }
+}