Current progress!

.gitignore

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+/target

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "cfg-if"
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+
+[[package]]
+name = "getrandom"
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+checksum = "fe9006bed769170c11f845cf00c7c1e9092aeb3f268e007c3e760ac68008070f"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
+[[package]]
+name = "libc"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
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+
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+
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+dependencies = [
+ "libc",
+ "rand_chacha",
+ "rand_core",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+ "rand_core",
+]
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+dependencies = [
+ "getrandom",
+]
+
+[[package]]
+name = "supernovae"
+version = "0.1.0"
+dependencies = [
+ "ulid",
+]
+
+[[package]]
+name = "ulid"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7e37c4b6cbcc59a8dcd09a6429fbc7890286bcbb79215cea7b38a3c4c0921d93"
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+ "rand",
+]
+
+[[package]]
+name = "wasi"
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Cargo.toml

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+[package]
+name = "supernovae"
+version = "0.1.0"
+edition = "2021"
+rust-version = "1.74.0"
+license = "Apache-2.0"
+
+[dependencies]
+ulid = "1.1.0"

README.md

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+# Supernovae
+A chat server written in Rust as a way to learn, and to hopefully build a
+proof-of-concept federated and decentralised chat platform!

src/account.rs

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+use ulid::Ulid;
+
+#[derive(Debug)]
+pub enum Service {
+    Local,
+    GitHub
+}
+
+pub struct UserSource<'a> {
+    pub id: usize,
+    pub domain: &'a str,
+    pub authorised: bool,
+    pub banned: bool
+}
+
+#[derive(Debug)]
+pub struct Login<'a> {
+    pub service: Service, // The service that the user is using for auth
+    pub service_user: &'a str, // User ID in the service provider
+    pub uid: Ulid // User's ID that the login belongs to
+}
+
+impl Service {
+    pub fn as_str(&self) -> &str {
+        match self {
+            Service::Local => "Local",
+            Service::GitHub => "GitHub"
+        }
+    }
+}

src/main.rs

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+pub mod routes;
+pub mod account;
+pub mod semver;
+
+fn main() {
+    println!("Hello, world!");
+}

src/semver.rs

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+use std::fmt::Display;
+
+const BITMASK_21_BITS: u32 = 0b111111111111111111111;
+const BITMASK_22_BITS: u32 = 0b1111111111111111111111;
+
+#[derive(Debug, PartialEq, Eq)]
+pub enum SemVerError {
+    MajorTooLarge,
+    MinorTooLarge,
+    PatchTooLarge,
+}
+
+#[derive(Debug, PartialEq, Eq)]
+pub struct SemVer(u64);
+
+impl SemVer {
+    pub fn new(major: u32, minor: u32, patch: u32) -> Result<Self, SemVerError> {
+        if major > BITMASK_21_BITS {
+            return Err(SemVerError::MajorTooLarge);
+        } else if minor > BITMASK_21_BITS {
+            return Err(SemVerError::MinorTooLarge);
+        } else if patch > BITMASK_22_BITS {
+            return Err(SemVerError::PatchTooLarge);
+        }
+
+        let res: u64 = u64::from(major) << 43 | u64::from(minor) << 22 | u64::from(patch);
+
+        Ok(SemVer(res))
+    }
+
+    pub fn major(&self) -> u32 {
+        (self.0 >> 43) as u32
+    }
+
+    pub fn minor(&self) -> u32 {
+        ((self.0 >> 22) & BITMASK_21_BITS as u64) as u32
+    }
+
+    pub fn patch(&self) -> u32 {
+        (self.0 & BITMASK_22_BITS as u64) as u32
+    }
+
+    pub fn set_major(&mut self, major: u32) -> Result<(), SemVerError> {
+        if major > BITMASK_21_BITS {
+            return Err(SemVerError::MajorTooLarge);
+        }
+        self.0 &= !(BITMASK_21_BITS as u64) << 43;
+        self.0 |= u64::from(major) << 43;
+        Ok(())
+    }
+
+    pub fn set_minor(&mut self, minor: u32) -> Result<(), SemVerError> {
+        if minor > BITMASK_21_BITS {
+            return Err(SemVerError::MinorTooLarge);
+        }
+        self.0 &= !(BITMASK_21_BITS as u64) << 22;
+        self.0 |= u64::from(minor) << 22;
+        Ok(())
+    }
+
+    pub fn set_patch(&mut self, patch: u32) -> Result<(), SemVerError> {
+        if patch > BITMASK_22_BITS {
+            return Err(SemVerError::PatchTooLarge);
+        }
+        self.0 &= !BITMASK_22_BITS as u64;
+        self.0 |= u64::from(patch);
+        Ok(())
+    }
+}
+
+impl Display for SemVer {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}.{}.{}", self.major(), self.minor(), self.patch())
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    const SEMVER_1_2_3: SemVer = SemVer(8796101410819);
+
+    #[test]
+    fn validate_semver_eq() {
+        assert_eq!(SEMVER_1_2_3, SemVer::new(1, 2, 3).unwrap());
+    }
+
+    #[test]
+    fn validate_semver_ne() {
+        assert_ne!(SEMVER_1_2_3, SemVer::new(1, 2, 4).unwrap());
+    }
+
+    #[test]
+    fn validate_semver_errors() {
+        assert_eq!(SemVer::new(2097152, 2, 4).unwrap_err(), SemVerError::MajorTooLarge);
+        assert_eq!(SemVer::new(1, 2097152, 4).unwrap_err(), SemVerError::MinorTooLarge);
+        assert_eq!(SemVer::new(1, 2, 4194304).unwrap_err(), SemVerError::PatchTooLarge);
+    }
+
+    #[test]
+    fn validate_semver_valid() {
+        SemVer::new(2097151, 2, 4).unwrap();
+        SemVer::new(1, 2097151, 4).unwrap();
+        SemVer::new(1, 2, 4194303).unwrap();
+    }
+
+    #[test]
+    fn validate_semver_values() {
+        assert_eq!(SEMVER_1_2_3.major(), 1);
+        assert_eq!(SEMVER_1_2_3.minor(), 2);
+        assert_eq!(SEMVER_1_2_3.patch(), 3);
+    }
+
+    #[test]
+    fn validate_semver_set_values_valid() {
+        let mut semver = SEMVER_1_2_3;
+
+        semver.set_major(3).unwrap();
+        semver.set_minor(2).unwrap();
+        semver.set_patch(1).unwrap();
+    }
+
+    #[test]
+    fn validate_semver_set_values_errors() {
+        let mut semver = SEMVER_1_2_3;
+
+        assert_eq!(semver.set_major(2097152).unwrap_err(), SemVerError::MajorTooLarge);
+        assert_eq!(semver.set_minor(2097152).unwrap_err(), SemVerError::MinorTooLarge);
+        assert_eq!(semver.set_patch(4194304).unwrap_err(), SemVerError::PatchTooLarge);
+    }
+}