From a8d1be9536bce6d6be2cf1586c8bac049e820d31 Mon Sep 17 00:00:00 2001
From: fxqnlr <felixquinn03@gmail.com>
Date: Sun, 8 Sep 2024 17:21:27 +0200
Subject: save files, real last modified check (doesn't work correctly)

---
 src/backup.rs | 126 +++++++++++++++++++++++++++++++++++-----------------------
 1 file changed, 76 insertions(+), 50 deletions(-)

(limited to 'src/backup.rs')

diff --git a/src/backup.rs b/src/backup.rs
index 8cc94f1..a643cb2 100644
--- a/src/backup.rs
+++ b/src/backup.rs
@@ -5,7 +5,6 @@ use std::{
     time::{SystemTime, UNIX_EPOCH},
 };
 
-use gethostname::gethostname;
 use serde::{Deserialize, Serialize};
 use uuid::Uuid;
 
@@ -20,10 +19,11 @@ pub type BackupId = String;
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct Backup {
-    id: String,
+    pub id: String,
     timestamp: u64,
     packages: Vec<Package>,
-    files: Vec<PathInfo>,
+    pub files: Vec<PathInfo>,
+    device: String,
 }
 
 impl Backup {
@@ -33,63 +33,82 @@ impl Backup {
             files.push(PathInfo::from_path(config, dir)?);
         }
         Ok(Self {
-            // UUID not really needed, maybe a shorter hash
+            // TODO: UUID not really needed, maybe a shorter hash
             id: Uuid::new_v4().to_string(),
             timestamp: Self::get_timestamp(),
             packages,
             files,
+            device: config.device.clone(),
         })
     }
 
     pub fn save(&self, config: &Config) -> Result<()> {
-        let rel_location = format!(
-            "{}_{}",
-            gethostname()
-                .into_string()
-                .map_err(|_| Error::InvalidOsString)?,
-            Self::get_timestamp()
-        );
-
-        let bl = BackupLocation {
-            id: self.id.to_string(),
-            rel_location,
-        };
-
-        Self::append_to_root_index(config, bl.clone())?;
+        println!("Save Backup {:?}", self.get_location(config));
+        // println!("{self:#?}");
+        self.get_location(config).append_to_root(config)?;
 
-        let backup_root = format!("{}/{}", config.root, bl.rel_location);
+        let backup_root = self.get_location(config).get_absolute_dir(config);
         create_dir_all(&backup_root).unwrap();
         let path = format!("{}/index.json", backup_root);
         let mut f = File::create(path).unwrap();
         f.write_all(&serde_json::to_vec(self).unwrap()).unwrap();
 
+        for path in &self.files {
+            path.save(&backup_root)?;
+        }
+
         Ok(())
     }
 
-    pub fn get_index(config: &Config, id: Option<BackupId>) -> Result<Self> {
+    pub fn get_last(config: &Config) -> Result<Option<Self>> {
         let backup_index_root = format!("{}/index.json", config.root);
-        let list: Vec<BackupLocation> = Self::get_json_content(&backup_index_root)?;
-        println!("{list:#?}");
-
-        let index_loc = if let Some(id) = id {
-            list.iter()
-                .find(|bl| bl.id == id)
-                .ok_or(Error::BackupNotFound)?
-                .rel_location
-                .clone()
-        } else {
-            list.last()
-                .ok_or(Error::BackupNotFound)?
-                .rel_location
-                .clone()
+        let list: Vec<BackupLocation> = match Self::get_json_content(&backup_index_root) {
+            Ok(list) => list,
+            Err(err) => {
+                if err.to_string() == "io: No such file or directory (os error 2)" {
+                    return Ok(None);
+                };
+                return Err(err);
+            }
         };
 
+        Ok(Some(Self::from_index(
+            config,
+            list.last().ok_or(Error::BackupNotFound)?.id.clone(),
+        )?))
+    }
+
+    pub fn from_index(config: &Config, id: BackupId) -> Result<Self> {
+        let backup_index_root = format!("{}/index.json", config.root);
+        let list: Vec<BackupLocation> = Self::get_json_content(&backup_index_root)?;
+        let index_loc = list
+            .iter()
+            .find(|bl| bl.id == id)
+            .ok_or(Error::BackupNotFound)?
+            .rel_location
+            .clone();
+
         let path = format!("{}/{index_loc}/index.json", config.root);
         let index_file: Self = Self::get_json_content(&path)?;
 
         Ok(index_file)
     }
 
+    pub fn get_location(&self, config: &Config) -> BackupLocation {
+        let rel_location = format!("{}_{}", config.device, self.timestamp);
+
+        BackupLocation {
+            id: self.id.to_string(),
+            rel_location,
+        }
+    }
+
+    pub fn get_absolute_file_location(&self, config: &Config, rel_location: &str) -> String {
+        let loc = self.get_location(config).get_absolute_dir(config);
+
+        format!("{}/{}", loc, rel_location)
+    }
+
     fn get_json_content<T: for<'a> Deserialize<'a>>(path: &str) -> Result<T> {
         let mut file = File::open(path)?;
         let mut content = String::new();
@@ -97,7 +116,26 @@ impl Backup {
         Ok(serde_json::from_str(&content)?)
     }
 
-    fn append_to_root_index(config: &Config, new_backup: BackupLocation) -> Result<()> {
+    fn get_timestamp() -> u64 {
+        SystemTime::now()
+            .duration_since(UNIX_EPOCH)
+            .unwrap()
+            .as_secs()
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct BackupLocation {
+    id: BackupId,
+    rel_location: String,
+}
+
+impl BackupLocation {
+    pub fn get_absolute_dir(&self, config: &Config) -> String {
+        format!("{}/{}", config.root, self.rel_location)
+    }
+
+    pub fn append_to_root(&self, config: &Config) -> Result<()> {
         let backup_index_root = format!("{}/index.json", config.root);
         let path = PathBuf::from(&backup_index_root);
         if path.exists() {
@@ -107,27 +145,15 @@ impl Backup {
             let mut loc: Vec<BackupLocation> = serde_json::from_str(&content)?;
 
             let mut f = File::create(path)?;
-            loc.push(new_backup);
+            loc.push(self.clone());
 
             f.write_all(&serde_json::to_vec(&loc)?)?;
         } else {
+            create_dir_all(&config.root).unwrap();
             let mut f = File::create(backup_index_root)?;
-            f.write_all(&serde_json::to_vec(&vec![new_backup])?)?;
+            f.write_all(&serde_json::to_vec(&vec![self])?)?;
         };
 
         Ok(())
     }
-
-    fn get_timestamp() -> u64 {
-        SystemTime::now()
-            .duration_since(UNIX_EPOCH)
-            .unwrap()
-            .as_secs()
-    }
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-struct BackupLocation {
-    id: BackupId,
-    rel_location: String,
 }
-- 
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