teach Houses how to download Vans

5 files changed, 92 insertions, 17 deletions

diff --git a/src/errors.rs b/src/errors.rs
index 29f7f4f..3c261c7 100644
--- a/src/errors.rs
+++ b/src/errors.rs
@@ -14,5 +14,7 @@ pub enum Error {
     Allocation(String),
     #[error("I/O: {0}")]
     Io(#[from] std::io::Error),
+    #[error("Remote command error: {0}")]
+    RemoteCommand(String),
 }
 
diff --git a/src/house.rs b/src/house.rs
index ad6e055..33d3573 100644
--- a/src/house.rs
+++ b/src/house.rs
@@ -4,6 +4,7 @@
   */
 use crate::waifu::*;
 use crate::errors::Error;
+use crate::van::Van;
 use serde::{Serialize, Deserialize};
 use virt::{connect::Connect, domain::Domain};
 use std::process::{ExitStatus};
@@ -98,7 +99,7 @@ impl House {
     ///
     /// h.introduce("test-2", 1024, 1, 20000, "test.iso").unwrap();
     /// ```
-    pub async fn introduce(&mut self, name: String, max_mem: Memory, max_cpus: CpuCount, disk_size_mb: u64, image_name: String) -> Result<Waifu, Error> {
+    pub async fn introduce(&mut self, name: String, max_mem: Memory, max_cpus: CpuCount, disk_size_mb: u64, van: Van) -> Result<Waifu, Error> {
         // Check for image on host machine
         
         let mut output = Command::new("ssh")
@@ -106,13 +107,13 @@ impl House {
                   "-oStrictHostKeyChecking=accept-new",
                   &self.address.clone(),
                   "stat",
-                  &format!("/var/lib/libvirt/images/{}", image_name.clone())
+                  &format!("/var/lib/libvirt/images/{}", van.make_pretty_name().clone())
             ])
             .output()
             .await?;
 
         if output.status != ExitStatus::from_raw(0) {
-           return Err(Error::MissingImage(image_name.clone()));
+           return Err(Error::MissingImage(van.name.clone()));
         }
 
         // Allocate VM disk
@@ -145,8 +146,8 @@ impl House {
             uuid.to_string(),
             random_mac().clone(),
             true,
-            max_mem.count(),
-            max_cpus.count(),
+            max_mem.0,
+            max_cpus.0,
             "blank".to_string()
             )?;
 
diff --git a/src/lib.rs b/src/lib.rs
index 2ee2274..0518b63 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -4,4 +4,6 @@ pub mod waifu;
 
 pub mod house;
 
+pub mod van;
+
 include!(concat!(env!("OUT_DIR"), "/templates.rs"));
diff --git a/src/van.rs b/src/van.rs
new file mode 100644
index 0000000..7024f73
--- /dev/null
+++ b/src/van.rs
@@ -0,0 +1,80 @@
+/*! A Van is a moving van, or an installation ISO */
+
+use tokio::process::Command;
+use std::process::ExitStatus;
+use std::os::unix::process::ExitStatusExt;
+use std::str::FromStr;
+
+use crate::errors::Error;
+
+/// Describes a hash of a file
+pub struct Sha256(pub String);
+
+impl FromStr for Sha256 {
+    type Err = Error;
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let sum = s.clone();
+
+        Ok(Sha256(sum.to_string()))
+    }
+}
+
+impl ToString for Sha256 {
+    fn to_string(&self) -> String {
+        self.0.clone()
+    }
+}
+
+/// Describes a moving Van, or a way to install a distribution
+pub struct Van {
+    /// The common name of the distribution (e.g "Arch Linux")
+    pub name: String,
+    /// The SHA-256 hash of the downloaded file
+    pub shasum: Sha256,
+    /// Where the ISO can be downloaded from
+    pub download_url: String,
+    /// The commonly accepted version (e.g "rolling", "21.11", "unstable")
+    pub version: String,
+}
+
+impl Van {
+    pub fn new(name: String,
+               shasum: String,
+               download_url: String,
+               version: String
+               ) -> Self {
+        Self {
+            name,
+            shasum: Sha256(shasum),
+            download_url,
+            version
+        }
+    }
+
+    pub async fn download(&self, target: String) -> Result<(), Error> {
+        let mut output = Command::new("ssh")
+            .args([
+                  "-oStrictHostKeyChecking=accept-new",
+                  &target.clone(),
+                  "wget",
+                  "-O",
+                  &self.download_url.clone(),
+                  &format!("/var/lib/libvirt/images/{}", self.make_pretty_name().clone())
+            ])
+            .output()
+            .await?;
+
+        if output.status != ExitStatus::from_raw(0) {
+            Err(Error::RemoteCommand(String::from_utf8(output.stdout).unwrap()))
+        } else {
+            Ok(())
+        }
+    }
+
+    pub fn make_pretty_name(&self) -> String {
+        let safe_name = self.name.clone().to_lowercase().replace(" ", "-");
+        let file_name = format!("{}-{}-{}.van", safe_name, self.version.clone(), self.shasum.0.clone());
+
+        file_name
+    }
+}
diff --git a/src/waifu.rs b/src/waifu.rs
index da9653f..bb99d2b 100644
--- a/src/waifu.rs
+++ b/src/waifu.rs
@@ -8,7 +8,7 @@ use crate::errors::Error;
  * Defines the amount of memory a waifu has
  */
 #[derive(Debug, Serialize, Deserialize)]
-pub struct Memory(u64);
+pub struct Memory(pub u64);
 
 impl From<u64> for Memory {
     fn from(u: u64) -> Self {
@@ -16,16 +16,11 @@ impl From<u64> for Memory {
     }
 }
 
-impl Memory {
-    pub fn count(&self) -> u64 {
-        self.0
-    }
-}
 /**
  * Defines the number of vCPUs a waifu has
  */
 #[derive(Debug, Serialize, Deserialize)]
-pub struct CpuCount(u64);
+pub struct CpuCount(pub u64);
 
 impl From<u64> for CpuCount {
     fn from(u: u64) -> Self {
@@ -33,11 +28,6 @@ impl From<u64> for CpuCount {
     }
 }
 
-impl CpuCount {
-    pub fn count(&self) -> u64 {
-        self.0
-    }
-}
 /**
  * Represents a virtual machine, that's active on some server
  *