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[rbdr/blog] / src / archiver / mod.rs

diff --git a/src/archiver/mod.rs b/src/archiver/mod.rs
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..6f0c28483c7cbe9446bd84e4a9699addea0d58ad 100644 (file)
--- a/src/archiver/mod.rs
+++ b/src/archiver/mod.rs
@@ -0,0 +1,130 @@
+mod raw;
+mod gemini;
+mod gopher;
+
+use std::collections::HashMap;
+use std::fs::read_dir;
+use std::io::Result;
+use std::path::PathBuf;
+use time::{OffsetDateTime, format_description::FormatItem, macros::format_description};
+use crate::template::{TemplateContext, TemplateValue};
+
+const DATE_FORMAT: &[FormatItem<'_>] = format_description!("[year]-[month]-[day]");
+
+struct ArchiveEntry {
+    id: String,
+    slug: String
+}
+
+impl ArchiveEntry {
+    pub fn to_template_context(archive_entries: &Vec<ArchiveEntry>) -> TemplateContext {
+        let mut context = HashMap::new();
+
+        let archive_entries_collection = archive_entries
+            .iter()
+            .map(|archive_entry| archive_entry.to_template_value())
+            .collect();
+
+        context.insert(
+            "archive_length".to_string(),
+            TemplateValue::Unsigned(
+                archive_entries.len().try_into().unwrap()
+            )
+        );
+        context.insert(
+            "posts".to_string(),
+            TemplateValue::Collection(archive_entries_collection)
+        );
+
+        context
+    }
+
+    pub fn to_template_value(&self) -> TemplateContext {
+        let mut context = HashMap::new();
+
+        context.insert(
+            "id".to_string(),
+            TemplateValue::String(self.id.clone())
+        );
+
+        context.insert(
+            "slug".to_string(),
+            TemplateValue::String(self.slug.clone())
+        );
+
+        if let Some(title) = self.title() {
+            context.insert(
+                "title".to_string(),
+                TemplateValue::String(title)
+            );
+        }
+
+        context
+    }
+
+    fn title(&self) -> Option<String> {
+        let date = OffsetDateTime::from_unix_timestamp_nanos(
+            (self.id.parse::<u64>().ok()? * 1_000_000).into()
+        ).ok()?;
+        let short_date = date.format(&DATE_FORMAT).ok()?;
+        let title = self.slug.replace("-", " ");
+        Some(format!("{} {}", short_date, title))
+    }
+}
+
+fn read_archive(archive_directory: &PathBuf) -> Vec<ArchiveEntry> {
+    let mut archive_entries = Vec::new();
+    if let Ok(entries) = read_dir(&archive_directory) {
+        for entry in entries.filter_map(Result::ok) {
+            let entry_path = entry.path();
+            let post_id = entry.file_name();
+            if let Ok(entry_type) = entry.file_type() {
+                if entry_type.is_dir() {
+                    if let Ok(candidates) = read_dir(&entry_path) {
+                        for candidate in candidates.filter_map(Result::ok) {
+                            let candidate_path = candidate.path();
+                            match candidate_path.extension() {
+                                Some(extension) => {
+                                    if extension == "gmi" {
+                                        if let Some(slug) = candidate_path.file_stem() {
+                                            if let (Some(post_id), Some(slug)) = (post_id.to_str(), slug.to_str()) {
+                                                archive_entries.push(ArchiveEntry {
+                                                    id: post_id.to_string(),
+                                                    slug: slug.to_string()
+                                                })
+                                            }
+                                        }
+                                    }
+                                },
+                                _ => continue
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    archive_entries
+        .sort_by(|a, b| b.id.cmp(&a.id));
+    archive_entries
+}
+
+
+pub fn archive(archive_directory: &PathBuf, template_directory: &PathBuf, output_directory: &PathBuf) -> Result<()> {
+    let archivers = available_archivers();
+    let archive_entries = read_archive(archive_directory);
+    let context = ArchiveEntry::to_template_context(&archive_entries);
+    for archiver in archivers {
+        archiver(archive_directory, template_directory, output_directory, &context)?;
+    }
+    return Ok(())
+}
+
+fn available_archivers() -> Vec<fn(&PathBuf, &PathBuf, &PathBuf, &TemplateContext) -> Result<()>> {
+    vec![
+        raw::archive,
+        gemini::archive,
+        gopher::archive
+    ]
+}