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[rbdr/blog] / 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