Improve the error handling

[rbdr/blog] / src / command / update.rs

diff --git a/src/command/update.rs b/src/command/update.rs
index 0a0211cbae485729691120850c88dca78c01a4f9..8a3d6de47e27e41d53d66b6b13344fc6ee2e5832 100644 (file)
--- a/src/command/update.rs
+++ b/src/command/update.rs
@@ -1,5 +1,11 @@
-use std::io::Result;
+use std::fs::{copy, create_dir_all, read_dir, remove_dir_all, write};
+use std::io::{Result, Error, ErrorKind};
+use std::path::PathBuf;
 use super::{sync_down::SyncDown, generate::Generate, sync_up::SyncUp};
+use crate::configuration::Configuration;
+use crate::constants::METADATA_FILENAME;
+use crate::metadata::Metadata;
+use serde_json;
 
 pub struct Update;
 
@@ -7,6 +13,40 @@ impl Update {
     pub fn new() -> Self {
         Update
     }
+
+    fn copy_post(&self, source: &PathBuf, target: &PathBuf) -> Result<()> {
+        let post_name = source.file_name()
+            .ok_or_else(|| Error::new(ErrorKind::InvalidInput, "Could not get post filename."))?;
+
+        let target_post = target.join(post_name);
+        copy(source, target_post)?;
+        Ok(())
+    }
+
+    fn write_metadata(&self, metadata: &Metadata, metadata_location: &PathBuf) -> Result<()> {
+        let serialized_metadata = serde_json::to_string(&metadata)?;
+        write(metadata_location, serialized_metadata)?;
+        Ok(())
+    }
+
+    fn archive(&self, source: &PathBuf, target: &PathBuf) -> Result<()> {
+        let entries = read_dir(source)?;
+        for entry in entries {
+            let entry = entry?;
+            let entry_type = entry.file_type()?;
+            let entry_name = entry.file_name();
+            let entry_source = entry.path();
+            let entry_target = target.join(entry_name);
+
+            if entry_type.is_dir() {
+                self.archive(&entry_source, &entry_target)?;
+            } else {
+                copy(&entry_source, &entry_target)?;
+            }
+        }
+
+        Ok(())
+    }
 }
 
 impl super::Command for Update {
@@ -14,8 +54,37 @@ impl super::Command for Update {
         vec![Box::new(SyncDown::new())]
     }
 
-    fn execute(&self, input: Option<&String>) -> Result<()> {
-        println!("Update: {:?}!", input);
+    fn execute(&self, input: Option<&String>, configuration: &Configuration, _: &String) -> Result<()> {
+        let input = input
+            .ok_or_else(|| Error::new(ErrorKind::InvalidInput, "You must provide a path to a post"))?;
+        let post_location = PathBuf::from(input);
+        if !post_location.exists() {
+            return Err(Error::new(ErrorKind::NotFound, "The path provided does not exist"));
+        }
+
+        // Step 1. Write into the ephemeral posts
+
+        create_dir_all(&configuration.posts_directory)?;
+
+        let first_post_path = configuration.posts_directory.join("0");
+        let metadata_file_path = first_post_path.join(METADATA_FILENAME);
+        let metadata = Metadata::read_or_create(&metadata_file_path);
+
+        let _ = remove_dir_all(&first_post_path);
+        create_dir_all(&first_post_path)?;
+
+        self.copy_post(&post_location, &first_post_path)?;
+        self.write_metadata(&metadata, &metadata_file_path)?;
+
+        // Step 2. Write into the archive
+
+        create_dir_all(&configuration.archive_directory)?;
+
+        let post_archive_path = configuration.archive_directory.join(metadata.id);
+        let _ = remove_dir_all(&post_archive_path);
+        create_dir_all(&post_archive_path)?;
+
+        self.archive(&first_post_path, &post_archive_path)?;
         return Ok(())
     }