git.r.bdr.sh - rbdr/blog/blob - src/archiver/mod.rs

   1 mod gemini;
   2 mod gopher;
   3 mod raw;
   4
   5 use crate::template::{Context, Value};
   6 use std::collections::HashMap;
   7 use std::fs::read_dir;
   8 use std::io::Result;
   9 use std::path::{Path, PathBuf};
  10 use time::{format_description::FormatItem, macros::format_description, OffsetDateTime};
  11
  12 const DATE_FORMAT: &[FormatItem<'_>] = format_description!("[year]-[month]-[day]");
  13
  14 struct ArchiveEntry {
  15     id: String,
  16     slug: String,
  17 }
  18
  19 type Archiver = fn(&Path, &Path, &Path, &Context) -> Result<()>;
  20
  21 impl ArchiveEntry {
  22     pub fn to_template_context(archive_entries: &[ArchiveEntry]) -> Context {
  23         let mut context = HashMap::new();
  24
  25         let archive_entries_collection = archive_entries
  26             .iter()
  27             .map(ArchiveEntry::to_template_value)
  28             .collect();
  29
  30         context.insert(
  31             "archive_length".to_string(),
  32             Value::Unsigned(archive_entries.len().try_into().unwrap()),
  33         );
  34         context.insert(
  35             "posts".to_string(),
  36             Value::Collection(archive_entries_collection),
  37         );
  38
  39         context
  40     }
  41
  42     pub fn to_template_value(&self) -> Context {
  43         let mut context = HashMap::new();
  44
  45         context.insert("id".to_string(), Value::String(self.id.clone()));
  46
  47         context.insert("slug".to_string(), Value::String(self.slug.clone()));
  48
  49         if let Some(title) = self.title() {
  50             context.insert("title".to_string(), Value::String(title));
  51         }
  52
  53         context
  54     }
  55
  56     fn title(&self) -> Option<String> {
  57         let date = OffsetDateTime::from_unix_timestamp_nanos(
  58             (self.id.parse::<u64>().ok()? * 1_000_000).into(),
  59         )
  60         .ok()?;
  61         let short_date = date.format(&DATE_FORMAT).ok()?;
  62         let title = self.slug.replace('-', " ");
  63         Some(format!("{short_date} {title}"))
  64     }
  65 }
  66
  67 fn read_archive(archive_directory: &PathBuf) -> Vec<ArchiveEntry> {
  68     let mut archive_entries = Vec::new();
  69     if let Ok(entries) = read_dir(archive_directory) {
  70         for entry in entries.filter_map(Result::ok) {
  71             let entry_path = entry.path();
  72             let post_id = entry.file_name();
  73             if let Ok(entry_type) = entry.file_type() {
  74                 if entry_type.is_dir() {
  75                     if let Ok(candidates) = read_dir(&entry_path) {
  76                         for candidate in candidates.filter_map(Result::ok) {
  77                             let candidate_path = candidate.path();
  78                             match candidate_path.extension() {
  79                                 Some(extension) => {
  80                                     if extension == "gmi" {
  81                                         if let Some(slug) = candidate_path.file_stem() {
  82                                             if let (Some(post_id), Some(slug)) =
  83                                                 (post_id.to_str(), slug.to_str())
  84                                             {
  85                                                 archive_entries.push(ArchiveEntry {
  86                                                     id: post_id.to_string(),
  87                                                     slug: slug.to_string(),
  88                                                 });
  89                                             }
  90                                         }
  91                                     }
  92                                 }
  93                                 _ => continue,
  94                             }
  95                         }
  96                     }
  97                 }
  98             }
  99         }
 100     }
 101
 102     archive_entries.sort_by(|a, b| b.id.cmp(&a.id));
 103     archive_entries
 104 }
 105
 106 pub fn archive(
 107     archive_directory: &PathBuf,
 108     template_directory: &Path,
 109     output_directory: &Path,
 110 ) -> Result<()> {
 111     let archivers = available_archivers();
 112     let archive_entries = read_archive(archive_directory);
 113     let context = ArchiveEntry::to_template_context(&archive_entries);
 114     for archiver in archivers {
 115         archiver(
 116             archive_directory,
 117             template_directory,
 118             output_directory,
 119             &context,
 120         )?;
 121     }
 122     Ok(())
 123 }
 124
 125 fn available_archivers() -> Vec<Archiver> {
 126     vec![raw::archive, gemini::archive, gopher::archive]
 127 }