Sort by date

Cargo.lock

@@ -2,6 +2,7 @@
 name = "gutenberg"
 version = "0.1.0"
 dependencies = [
+ "chrono 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "clap 2.20.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "error-chain 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "glob 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",

Cargo.toml

@@ -24,6 +24,7 @@ serde_derive = "0.9"
 tera = "0.8"
 slug = "0.1"
 syntect = "1"
+chrono = "0.3"
 
 # Below is for the serve cmd
 staticfile = "0.4"

src/cmd/serve.rs

@@ -5,7 +5,6 @@ use std::time::Duration;
 use std::thread;
 
 use iron::{Iron, Request, IronResult, Response, status};
-use iron::modifiers::Header;
 use mount::Mount;
 use staticfile::Static;
 use notify::{Watcher, RecursiveMode, watcher};
@@ -17,7 +16,7 @@ use errors::{Result};
 const LIVE_RELOAD: &'static [u8; 37809] = include_bytes!("livereload.js");
 
 
-fn livereload_handler(req: &mut Request) -> IronResult<Response> {
+fn livereload_handler(_: &mut Request) -> IronResult<Response> {
     Ok(Response::with((status::Ok, String::from_utf8(LIVE_RELOAD.to_vec()).unwrap())))
 }
 

src/front_matter.rs

@@ -3,6 +3,7 @@ use std::collections::HashMap;
 
 use toml;
 use tera::Value;
+use chrono::prelude::*;
 
 
 use errors::{Result};
@@ -67,6 +68,19 @@ impl FrontMatter {
 
         Ok(f)
     }
+
+    pub fn parse_date(&self) -> Option<NaiveDateTime> {
+        match self.date {
+            Some(ref d) => {
+                if d.contains("T") {
+                    DateTime::parse_from_rfc3339(d).ok().and_then(|s| Some(s.naive_local()))
+                } else {
+                    NaiveDate::parse_from_str(d, "%Y-%m-%d").ok().and_then(|s| Some(s.and_hms(0,0,0)))
+                }
+            },
+            None => None,
+        }
+    }
 }
 
 
@@ -183,6 +197,7 @@ slug = """#;
         let res = FrontMatter::parse(content);
         assert!(res.is_err());
     }
+
     #[test]
     fn test_errors_on_present_but_empty_url() {
         let content = r#"
@@ -192,4 +207,34 @@ url = """#;
         let res = FrontMatter::parse(content);
         assert!(res.is_err());
     }
+
+    #[test]
+    fn test_parse_date_yyyy_mm_dd() {
+        let content = r#"
+title = "Hello"
+description = "hey there"
+date = "2016-10-10""#;
+        let res = FrontMatter::parse(content).unwrap();
+        assert!(res.parse_date().is_some());
+    }
+
+    #[test]
+    fn test_parse_date_rfc3339() {
+        let content = r#"
+title = "Hello"
+description = "hey there"
+date = "2002-10-02T15:00:00Z""#;
+        let res = FrontMatter::parse(content).unwrap();
+        assert!(res.parse_date().is_some());
+    }
+
+    #[test]
+    fn test_cant_parse_random_date_format() {
+        let content = r#"
+title = "Hello"
+description = "hey there"
+date = "2002/10/12""#;
+        let res = FrontMatter::parse(content).unwrap();
+        assert!(res.parse_date().is_none());
+    }
 }

src/main.rs

@@ -15,6 +15,7 @@ extern crate tera;
 extern crate glob;
 extern crate syntect;
 extern crate slug;
+extern crate chrono;
 
 extern crate staticfile;
 extern crate iron;

src/page.rs

@@ -1,4 +1,5 @@
 /// A page, can be a blog post or a basic page
+use std::cmp::Ordering;
 use std::fs::File;
 use std::io::prelude::*;
 use std::path::Path;
@@ -176,10 +177,30 @@ impl ser::Serialize for Page {
     }
 }
 
-// Order pages by date, no-op for now
-// TODO: impl PartialOrd on Vec<Page> so we can use sort()?
-pub fn order_pages(pages: Vec<Page>) -> Vec<Page> {
-    pages
+impl PartialOrd for Page {
+    fn partial_cmp(&self, other: &Page) -> Option<Ordering> {
+        if self.meta.date.is_none() {
+            println!("No self data");
+            return Some(Ordering::Less);
+        }
+
+        if other.meta.date.is_none() {
+            println!("No other date");
+            return Some(Ordering::Greater);
+        }
+
+        let this_date = self.meta.parse_date().unwrap();
+        let other_date = other.meta.parse_date().unwrap();
+
+        if this_date > other_date {
+            return Some(Ordering::Less);
+        }
+        if this_date < other_date {
+            return Some(Ordering::Greater);
+        }
+
+        Some(Ordering::Equal)
+    }
 }
 
 

src/site.rs

@@ -118,6 +118,7 @@ impl Site {
 
         // And finally the index page
         let mut context = Context::new();
+        pages.sort_by(|a, b| a.partial_cmp(b).unwrap());
         context.add("pages", &pages);
         context.add("config", &self.config);
         let index = self.templates.render("index.html", &context)?;