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 use serde_json;
   9
  10 pub struct Update;
  11
  12 impl Update {
  13     pub fn new() -> Self {
  14         Update
  15     }
  16
  17     fn copy_post(&self, source: &PathBuf, target: &PathBuf) -> Result<()> {
  18         let post_name = source.file_name()
  19             .ok_or_else(|| Error::new(ErrorKind::InvalidInput, "Could not get post filename."))?;
  20
  21         let target_post = target.join(post_name);
  22         copy(source, target_post)?;
  23         Ok(())
  24     }
  25
  26     fn write_metadata(&self, metadata: &Metadata, metadata_location: &PathBuf) -> Result<()> {
  27         let serialized_metadata = serde_json::to_string(&metadata)?;
  28         write(metadata_location, serialized_metadata)?;
  29         Ok(())
  30     }
  31
  32     fn archive(&self, source: &PathBuf, target: &PathBuf) -> Result<()> {
  33         let entries = read_dir(source)?;
  34         for entry in entries {
  35             let entry = entry?;
  36             let entry_type = entry.file_type()?;
  37             let entry_name = entry.file_name();
  38             let entry_source = entry.path();
  39             let entry_target = target.join(entry_name);
  40
  41             if entry_type.is_dir() {
  42                 self.archive(&entry_source, &entry_target)?;
  43             } else {
  44                 copy(&entry_source, &entry_target)?;
  45             }
  46         }
  47
  48         Ok(())
  49     }
  50 }
  51
  52 impl super::Command for Update {
  53     fn before_dependencies(&self) -> Vec<Box<dyn super::Command>> {
  54         vec![Box::new(SyncDown::new())]
  55     }
  56
  57     fn execute(&self, input: Option<&String>, configuration: &Configuration, _: &String) -> Result<()> {
  58         let input = input.expect("You must provide a path to a post");
  59         let post_location = PathBuf::from(input);
  60         if !post_location.exists() {
  61             return Err(Error::new(ErrorKind::NotFound, "The path provided does not exist"));
  62         }
  63
  64         // Step 1. Write into the ephemeral posts
  65
  66         create_dir_all(&configuration.posts_directory)?;
  67
  68         let first_post_path = configuration.posts_directory.join("0");
  69         let metadata_file_path = first_post_path.join(METADATA_FILENAME);
  70         let metadata = Metadata::read_or_create(&metadata_file_path);
  71
  72         let _ = remove_dir_all(&first_post_path);
  73         create_dir_all(&first_post_path)?;
  74
  75         self.copy_post(&post_location, &first_post_path)?;
  76         self.write_metadata(&metadata, &metadata_file_path)?;
  77
  78         // Step 2. Write into the archive
  79
  80         create_dir_all(&configuration.archive_directory)?;
  81
  82         let post_archive_path = configuration.archive_directory.join(metadata.id);
  83         let _ = remove_dir_all(&post_archive_path);
  84         create_dir_all(&post_archive_path)?;
  85
  86         self.archive(&first_post_path, &post_archive_path)?;
  87         return Ok(())
  88     }
  89
  90     fn after_dependencies(&self) -> Vec<Box<dyn super::Command>> {
  91         vec![
  92             Box::new(Generate::new()),
  93             Box::new(SyncUp::new())
  94         ]
  95     }
  96
  97     fn command(&self) -> &'static str {
  98         "update"
  99     }
 100
 101     fn help(&self) -> &'static str {
 102         "<path_to_post>\t\tUpdates latest blog post"
 103     }
 104 }
 105