git.r.bdr.sh - rbdr/blog/blob - src/command/update.rs

   1 use std::fs::{copy, create_dir_all, read_dir, remove_dir_all, write};
   2 use std::io::{Result, Error, ErrorKind};
   3 use std::path::PathBuf;
   4 use super::{sync_down::SyncDown, generate::Generate, sync_up::SyncUp};
   5 use crate::configuration::Configuration;
   6 use crate::constants::METADATA_FILENAME;
   7 use crate::metadata::Metadata;
   8
   9 pub struct Update;
  10
  11 impl Update {
  12     pub fn new() -> Self {
  13         Update
  14     }
  15
  16     fn copy_post(&self, source: &PathBuf, target: &PathBuf) -> Result<()> {
  17         let post_name = source.file_name()
  18             .ok_or_else(|| Error::new(ErrorKind::InvalidInput, "Could not get post filename."))?;
  19
  20         let target_post = target.join(post_name);
  21         copy(source, target_post)?;
  22         Ok(())
  23     }
  24
  25     fn write_metadata(&self, metadata: &Metadata, metadata_location: &PathBuf) -> Result<()> {
  26         let serialized_metadata = metadata.serialize();
  27         write(metadata_location, serialized_metadata)?;
  28         Ok(())
  29     }
  30
  31     fn archive(&self, source: &PathBuf, target: &PathBuf) -> Result<()> {
  32         let entries = read_dir(source)?;
  33         for entry in entries {
  34             let entry = entry?;
  35             let entry_type = entry.file_type()?;
  36             let entry_name = entry.file_name();
  37             let entry_source = entry.path();
  38             let entry_target = target.join(entry_name);
  39
  40             if entry_type.is_dir() {
  41                 self.archive(&entry_source, &entry_target)?;
  42             } else {
  43                 copy(&entry_source, &entry_target)?;
  44             }
  45         }
  46
  47         Ok(())
  48     }
  49 }
  50
  51 impl super::Command for Update {
  52     fn before_dependencies(&self) -> Vec<Box<dyn super::Command>> {
  53         vec![Box::new(SyncDown::new())]
  54     }
  55
  56     fn execute(&self, input: Option<&String>, configuration: &Configuration, _: &String) -> Result<()> {
  57         let input = input.expect("You must provide a path to a post");
  58         let post_location = PathBuf::from(input);
  59         if !post_location.exists() {
  60             return Err(Error::new(ErrorKind::NotFound, "The path provided does not exist"));
  61         }
  62
  63         // Step 1. Write into the ephemeral posts
  64
  65         create_dir_all(&configuration.posts_directory)?;
  66
  67         let first_post_path = configuration.posts_directory.join("0");
  68         let metadata_file_path = first_post_path.join(METADATA_FILENAME);
  69         let metadata = Metadata::read_or_create(&metadata_file_path);
  70
  71         let _ = remove_dir_all(&first_post_path);
  72         create_dir_all(&first_post_path)?;
  73
  74         self.copy_post(&post_location, &first_post_path)?;
  75         self.write_metadata(&metadata, &metadata_file_path)?;
  76
  77         // Step 2. Write into the archive
  78
  79         create_dir_all(&configuration.archive_directory)?;
  80
  81         let post_archive_path = configuration.archive_directory.join(metadata.id);
  82         let _ = remove_dir_all(&post_archive_path);
  83         create_dir_all(&post_archive_path)?;
  84
  85         self.archive(&first_post_path, &post_archive_path)?;
  86         return Ok(())
  87     }
  88
  89     fn after_dependencies(&self) -> Vec<Box<dyn super::Command>> {
  90         vec![
  91             Box::new(Generate::new()),
  92             Box::new(SyncUp::new())
  93         ]
  94     }
  95
  96     fn command(&self) -> &'static str {
  97         "update"
  98     }
  99
 100     fn help(&self) -> &'static str {
 101         "<path_to_post>\t\tUpdates latest blog post"
 102     }
 103 }
 104