From f0f3216e0182f58179b272efe1ae9251c08db030 Mon Sep 17 00:00:00 2001
From: Steppy <jonlaurem@gmail.com>
Date: Thu, 12 Dec 2024 19:45:45 +0100
Subject: [PATCH] Add file module

---
 src/file.rs                                | 137 +++++++++++++++++++++
 src/main.rs                                |   1 +
 test-ressources/files/TestPlugin-1.0.0.jar |   0
 test-ressources/files/bin-7.3              |   0
 test-ressources/files/test                 |   0
 test-ressources/files/unversioned.jar      |   0
 6 files changed, 138 insertions(+)
 create mode 100644 src/file.rs
 create mode 100644 test-ressources/files/TestPlugin-1.0.0.jar
 create mode 100644 test-ressources/files/bin-7.3
 create mode 100644 test-ressources/files/test
 create mode 100644 test-ressources/files/unversioned.jar

diff --git a/src/file.rs b/src/file.rs
new file mode 100644
index 0000000..fedf7b9
--- /dev/null
+++ b/src/file.rs
@@ -0,0 +1,137 @@
+use std::error::Error;
+use std::fmt::{Display, Formatter};
+use std::path::PathBuf;
+
+#[derive(Debug, Clone, Eq, PartialEq, Hash)]
+pub struct FileInfo {
+  pub name: String,
+  pub version: Option<String>,
+  pub ending: Option<String>,
+}
+
+impl TryFrom<PathBuf> for FileInfo {
+  type Error = FileInfoError;
+
+  fn try_from(file: PathBuf) -> Result<Self, Self::Error> {
+    if !file.is_file() {
+      return Err(FileInfoError::NotAFile);
+    }
+
+    let file_name = file.file_name().ok_or(FileInfoError::NotAFile)?;
+    let file_name = file_name
+      .to_str()
+      .ok_or(FileInfoError::InvalidCharactersInFileName)?;
+
+    let (file_name_without_version, ending) =
+      match file_name.rsplit_once('.').filter(|(_, ending)| {
+        ending.parse::<u32>().is_err() //there are usually no file extensions which are just a number, but rather versions
+      }) {
+        Some((name, ending)) => (name, Some(ending.to_string())),
+        None => (file_name, None),
+      };
+
+    let (name, version) = match file_name_without_version.split_once('-') {
+      Some((name, version)) => (name, Some(version.to_string())),
+      None => (file_name_without_version, None),
+    };
+
+    Ok(Self {
+      name: name.to_string(),
+      version,
+      ending,
+    })
+  }
+}
+
+impl Display for FileInfo {
+  fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+    write!(
+      f,
+      "{}{}{}",
+      self.name,
+      self
+        .version
+        .as_ref()
+        .map(|v| format!("-{v}"))
+        .unwrap_or_default(),
+      self
+        .ending
+        .as_ref()
+        .map(|e| format!(".{e}"))
+        .unwrap_or_default()
+    )
+  }
+}
+
+#[derive(Debug)]
+pub enum FileInfoError {
+  NotAFile,
+  InvalidCharactersInFileName,
+}
+
+impl Display for FileInfoError {
+  fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+    match self {
+      FileInfoError::NotAFile => write!(f, "Path doesn't point to a file"),
+      FileInfoError::InvalidCharactersInFileName => write!(f, "Invalid characters in file name"),
+    }
+  }
+}
+
+impl Error for FileInfoError {}
+
+#[cfg(test)]
+mod test_file_info {
+  use crate::file::FileInfo;
+  use std::path::PathBuf;
+
+  #[test]
+  fn test_from_plugin() {
+    assert_eq!(
+      FileInfo {
+        name: "TestPlugin".to_string(),
+        version: Some("1.0.0".to_string()),
+        ending: Some("jar".to_string()),
+      },
+      FileInfo::try_from(PathBuf::from("test-ressources/files/TestPlugin-1.0.0.jar"))
+        .expect("valid file")
+    );
+  }
+
+  #[test]
+  fn test_from_unversioned() {
+    assert_eq!(
+      FileInfo {
+        name: "unversioned".to_string(),
+        version: None,
+        ending: Some("jar".to_string()),
+      },
+      FileInfo::try_from(PathBuf::from("test-ressources/files/unversioned.jar"))
+        .expect("valid file")
+    );
+  }
+
+  #[test]
+  fn test_from_versioned_bin() {
+    assert_eq!(
+      FileInfo {
+        name: "bin".to_string(),
+        version: Some("7.3".to_string()),
+        ending: None,
+      },
+      FileInfo::try_from(PathBuf::from("test-ressources/files/bin-7.3")).expect("valid file")
+    );
+  }
+
+  #[test]
+  fn test_from_unversioned_bin() {
+    assert_eq!(
+      FileInfo {
+        name: "test".to_string(),
+        version: None,
+        ending: None,
+      },
+      FileInfo::try_from(PathBuf::from("test-ressources/files/test")).expect("valid file")
+    );
+  }
+}
diff --git a/src/main.rs b/src/main.rs
index a28a6cf..eb8458f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,4 +1,5 @@
 mod server;
+mod file;
 
 use clap::{Parser, Subcommand, ValueEnum};
 use lazy_regex::{lazy_regex, Lazy, Regex};
diff --git a/test-ressources/files/TestPlugin-1.0.0.jar b/test-ressources/files/TestPlugin-1.0.0.jar
new file mode 100644
index 0000000..e69de29
diff --git a/test-ressources/files/bin-7.3 b/test-ressources/files/bin-7.3
new file mode 100644
index 0000000..e69de29
diff --git a/test-ressources/files/test b/test-ressources/files/test
new file mode 100644
index 0000000..e69de29
diff --git a/test-ressources/files/unversioned.jar b/test-ressources/files/unversioned.jar
new file mode 100644
index 0000000..e69de29