Keep track of creation&modification times

Cargo.lock

@@ -143,6 +143,17 @@ version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
 
+[[package]]
+name = "chrono"
+version = "0.4.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "80094f509cf8b5ae86a4966a39b3ff66cd7e2a3e594accec3743ff3fabeab5b2"
+dependencies = [
+ "num-integer",
+ "num-traits",
+ "time",
+]
+
 [[package]]
 name = "clap"
 version = "2.33.0"
@@ -683,6 +694,25 @@ dependencies = [
  "winapi 0.3.8",
 ]
 
+[[package]]
+name = "num-integer"
+version = "0.1.42"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f6ea62e9d81a77cd3ee9a2a5b9b609447857f3d358704331e4ef39eb247fcba"
+dependencies = [
+ "autocfg 1.0.0",
+ "num-traits",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c62be47e61d1842b9170f0fdeec8eba98e60e90e5446449a0545e5152acd7096"
+dependencies = [
+ "autocfg 1.0.0",
+]
+
 [[package]]
 name = "opaque-debug"
 version = "0.2.3"
@@ -1197,6 +1227,7 @@ dependencies = [
  "anyhow",
  "async-trait",
  "blake2",
+ "chrono",
  "digest",
  "env_logger",
  "hex",

Cargo.toml

@@ -33,3 +33,4 @@ async-trait = "0.1.30"
 serde = "*"
 serde_derive = "*"
 horrorshow = "*"
+chrono = "*"

src/main.rs

@@ -173,7 +173,9 @@ async fn handle_post(
     };
     let page = write.get(post_id.to_owned()).await?;
 
-    let page = page.with_new_source_body(&get_rid_of_windows_newlines(form.get_body()?.to_owned()));
+    let mut page =
+        page.with_new_source_body(&get_rid_of_windows_newlines(form.get_body()?.to_owned()));
+    page.update_modification_time();
 
     write.put(&page).await?;
 

src/page.rs

@@ -1,7 +1,9 @@
 pub mod store;
 
+use crate::util;
 #[allow(unused)]
 use anyhow::Result;
+use chrono::prelude::*;
 use lazy_static::lazy_static;
 use std::collections::HashSet;
 pub use store::{InMemoryStore, Store, StoreMut};
@@ -14,11 +16,13 @@ pub type TagRef<'a> = &'a str;
 pub type IdRef<'a> = &'a str;
 
 const TAGWIKI_PAGE_ID_KEY: &str = "tagwiki-page-id";
+const TAGWIKI_CREATION_TIME_KEY: &str = "tagwiki-creation-time";
+const TAGWIKI_MODIFICATION_TIME_KEY: &str = "tagwiki-modification-time";
 
 #[derive(Debug, Default, Clone)]
 pub struct Source(String);
 
-#[derive(Debug, Default, Clone)]
+#[derive(Debug, Clone)]
 pub struct Parsed {
     pub source: Source,
     pub source_body: String,
@@ -50,18 +54,33 @@ fn split_headers_and_body(source: &Source) -> (&str, &str) {
     }
 }
 
-#[derive(Debug, Clone, Default)]
+#[derive(Debug, Clone)]
 pub struct Headers {
     pub id: String,
-    pub all: String,
+    pub creation_time: chrono::DateTime<FixedOffset>,
+    pub modification_time: chrono::DateTime<FixedOffset>,
+    pub other: String,
 }
 
+impl Default for Headers {
+    fn default() -> Self {
+        Self {
+            id: util::random_string(16),
+            creation_time: util::now(),
+            modification_time: util::now(),
+            other: "".into(),
+        }
+    }
+}
 impl Headers {
     fn parse(headers_str: &str, source: &Source) -> Headers {
         let mut id = None;
+        let mut creation = None;
+        let mut modification = None;
+        let mut other = String::new();
 
         for line in headers_str.lines() {
-            match line.split(":").collect::<Vec<_>>().as_slice() {
+            match line.splitn(2, ":").collect::<Vec<_>>().as_slice() {
                 [key, value] => {
                     let key = key.trim();
                     let value = value.trim();
@@ -69,38 +88,62 @@ impl Headers {
                         TAGWIKI_PAGE_ID_KEY => {
                             id = Some(value.to_owned());
                         }
-                        _ => {}
+                        TAGWIKI_CREATION_TIME_KEY => {
+                            let time = chrono::DateTime::<FixedOffset>::parse_from_rfc3339(value);
+                            creation = time.ok();
+                        }
+                        TAGWIKI_MODIFICATION_TIME_KEY => {
+                            let time = chrono::DateTime::<FixedOffset>::parse_from_rfc3339(value);
+                            modification = time.ok();
+                        }
+                        _ => {
+                            other.push_str(line);
+                            other.push_str("\n")
+                        }
                     }
                 }
-                _ => {}
+                _ => {
+                    other.push_str(line);
+                    other.push_str("\n")
+                }
             }
         }
 
-        match id {
-            Some(id) => Self {
-                id,
-                all: headers_str.to_owned(),
-            },
-            None => {
-                let mut hasher = blake2::Blake2b::new();
-                hasher.input(&source.0);
-                let res = hasher.result();
-                let id = hex::encode(&res.as_slice()[0..16]);
+        let id = id.unwrap_or_else(|| {
+            let mut hasher = blake2::Blake2b::new();
+            hasher.input(&source.0);
+            let res = hasher.result();
+            hex::encode(&res.as_slice()[0..16])
+        });
 
-                let mut all = String::new();
-                all.push_str(TAGWIKI_PAGE_ID_KEY);
-                all.push_str(": ");
-                all.push_str(&id);
-                all.push_str("\n");
-                all.push_str(headers_str);
+        let creation: DateTime<chrono::offset::FixedOffset> =
+            creation.unwrap_or_else(|| util::now());
 
-                Self { id, all }
-            }
+        let modification = modification.unwrap_or_else(|| util::now());
+
+        Self {
+            other,
+            id,
+            creation_time: creation,
+            modification_time: modification,
         }
     }
 
     fn to_markdown_string(&self) -> String {
-        "<!---\n".to_string() + &self.all + "\n-->\n"
+        "<!---\n".to_string()
+            + &format!("{}: {}\n", TAGWIKI_PAGE_ID_KEY, self.id)
+            + &format!(
+                "{}: {}\n",
+                TAGWIKI_CREATION_TIME_KEY,
+                self.creation_time.to_rfc3339()
+            )
+            + &format!(
+                "{}: {}\n",
+                TAGWIKI_MODIFICATION_TIME_KEY,
+                self.modification_time.to_rfc3339()
+            )
+            + &self.other
+            + "-->\n"
     }
 }
 
@@ -186,6 +229,10 @@ impl Parsed {
         }
     }
 
+    pub fn update_modification_time(&mut self) {
+        self.headers.modification_time = util::now();
+    }
+
     pub fn with_new_source_body(&self, new_body_source: &str) -> Self {
         Self::from_headers_and_body(self.headers.clone(), new_body_source.to_owned())
     }

src/page/store/fs.rs

@@ -108,9 +108,7 @@ impl FsStore {
 
         tokio::task::spawn_blocking(move || -> Result<()> {
             let mut file = std::fs::File::create(&tmp_path)?;
-            file.write_all(b"<!---\n")?;
-            file.write_all(page.headers.all.as_bytes())?;
-            file.write_all(b"\n-->\n")?;
+            file.write_all(page.headers.to_markdown_string().as_bytes())?;
             file.write_all(page.source_body.as_bytes())?;
 
             file.flush()?;

src/util.rs

@@ -7,3 +7,9 @@ pub fn random_string(len: usize) -> String {
         .take(len)
         .collect()
 }
+
+/// Now with a fixed offset of the current system timezone
+pub fn now() -> chrono::DateTime<chrono::offset::FixedOffset> {
+    let date = chrono::offset::Local::now();
+    date.with_timezone(&date.offset())
+}