From 6b995785c780dd47cb0e02821001f446cf4ec211 Mon Sep 17 00:00:00 2001
From: Cara Salter <cara@devcara.com>
Date: Wed, 20 Apr 2022 13:08:28 -0400
Subject: house: Allow for the introduction of new VMs

Templates the XML and creates the disk images
---
 src/house.rs | 115 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 111 insertions(+), 4 deletions(-)

(limited to 'src/house.rs')

diff --git a/src/house.rs b/src/house.rs
index 06dd62f..ad6e055 100644
--- a/src/house.rs
+++ b/src/house.rs
@@ -5,7 +5,12 @@
 use crate::waifu::*;
 use crate::errors::Error;
 use serde::{Serialize, Deserialize};
-use virt::connect::Connect;
+use virt::{connect::Connect, domain::Domain};
+use std::process::{ExitStatus};
+use std::os::unix::process::ExitStatusExt;
+use rand::Rng;
+
+use tokio::{process::Command, task::spawn_blocking};
 
 #[derive(Serialize, Deserialize, Debug)]
 pub enum Address {
@@ -36,6 +41,13 @@ pub struct House {
 }
 
 impl House { 
+    /// Creates a new House based on a libvirtd connect URL
+    ///
+    /// Example:
+    /// ```
+    /// use waifulib::house::House;
+    /// let mut h: House = House::new("test:///default".to_string()).unwrap();
+    /// ```
     pub fn new(url: String) -> Result<Self, Error> {
         let mut c = Connect::open(&url.clone())?;
 
@@ -47,6 +59,14 @@ impl House {
         })
     }
 
+    /// Lists the "inhabitants" of the House (the [Waifu]s on the machine
+    ///
+    /// ```
+    /// use waifulib::house::House;
+    /// let mut h: House = House::new("test:///default".to_string()).unwrap();
+    ///
+    /// assert_eq!(h.inhabitants().unwrap().len(), 1);
+    /// ```
     pub fn inhabitants(&mut self) -> Result<Vec<Waifu>, Error> {
         match &self.con {
             Some(c) => {
@@ -65,10 +85,97 @@ impl House {
         }
     }
 
-    /// TODO: Implement and figure out what the hell I need to define one of these
-    pub fn introduce(&mut self, name: String, max_mem: Memory, max_cpus: CpuCount) -> Result<&Waifu, Error> {
-        unimplemented!();
+    /// Introduces a new Waifu into the House, taking care of everything needed to make the VM run
+    /// fine
+    ///
+    /// If the installation image doesn't exist in the default libvirtd pool, this will fail with
+    /// [`Error::MissingImage`][crate::errors::Error::MissingImage].
+    ///
+    /// ```
+    /// use waifulib::house::House
+    ///
+    /// let mut h: House = House::new("test:///default".to_string()).unwrap();
+    ///
+    /// 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> {
+        // Check for image on host machine
+        
+        let mut output = Command::new("ssh")
+            .args([
+                  "-oStrictHostKeyChecking=accept-new",
+                  &self.address.clone(),
+                  "stat",
+                  &format!("/var/lib/libvirt/images/{}", image_name.clone())
+            ])
+            .output()
+            .await?;
+
+        if output.status != ExitStatus::from_raw(0) {
+           return Err(Error::MissingImage(image_name.clone()));
+        }
+
+        // Allocate VM disk
+        output = Command::new("ssh")
+            .args([
+                  "-oStrictHostKeyChecking=accept-new",
+                  &self.address.clone(),
+                  "qemu-img",
+                  "create",
+                  "-f",
+                  "qcow2",
+                  &format!("/var/lib/libvirt/images/{}.qcow2", name.clone()),
+                  &format!("{}M", disk_size_mb)
+            ])
+            .output()
+            .await?;
+
+        if output.status != ExitStatus::from_raw(0) {
+            return Err(Error::Allocation(String::from_utf8(output.stdout).unwrap()));
+        }
+
+        let uuid = uuid::Uuid::new_v4();
+        
+        // Let's get that XML ready
+        let mut buf: Vec<u8> = vec![];
+
+        crate::templates::vm_xml(
+            &mut buf,
+            name.clone(),
+            uuid.to_string(),
+            random_mac().clone(),
+            true,
+            max_mem.count(),
+            max_cpus.count(),
+            "blank".to_string()
+            )?;
+
+        let buf = String::from_utf8(buf).unwrap();
+
+        println!("{}", buf);
+
+        let dom: Domain = match &self.con {
+                Some(c) => {
+                    let dom = Domain::define_xml(&c, &buf)?;
+
+                    dom.create()?;
+
+                    dom
+                },
+                None => {
+                    return Err(Error::Connection("Connection was None".to_string()));
+                }
+            };
+
+        dom.try_into()
     }
+
+}
+
+fn random_mac() -> String {
+    let mut addr = rand::thread_rng().gen::<[u8; 6]>();
+    addr[0] = (addr[0] | 2) & 0xfe;
+    mac_address::MacAddress::new(addr).to_string()
 }
 
 #[cfg(test)]
-- 
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