Improve the error handling

[rbdr/blog] / src / metadata.rs

diff --git a/src/metadata.rs b/src/metadata.rs
index 97ef0d3262eb5b084f43dc8f8336ba7613e649ea..b2f67c5a8bade1af7cc8b3a6d955a5af3a5aacf8 100644 (file)
--- a/src/metadata.rs
+++ b/src/metadata.rs
@@ -2,40 +2,25 @@ use std::fs::File;
 use std::path::PathBuf;
 use std::io::Read;
 use std::time::{SystemTime, UNIX_EPOCH};
 use std::path::PathBuf;
 use std::io::Read;
 use std::time::{SystemTime, UNIX_EPOCH};

+use time::{OffsetDateTime, format_description::well_known::Rfc2822};
+use serde::{Serialize, Deserialize};
+use serde_json;

 
 

+#[derive(Serialize, Deserialize)]

 pub struct Metadata {
     pub id: String,
 pub struct Metadata {
     pub id: String,

-    pub created_on: u128
+    #[serde(alias = "createdOn")]
+    pub created_on: u64

 }
 
 impl Metadata {
 }
 
 impl Metadata {

-    pub fn serialize(&self) -> String {
-        format!(r#"{{\n  "id": "{}",\n  "created_on": {}\n}}"#, self.id, self.created_on)
-    }
-
-    pub fn deserialize(input: &str) -> Option<Metadata> {
-        let clean_input = input
-            .chars()
-            .filter(|c| !c.is_whitespace())
-            .collect::<String>();
-
-        let id = Metadata::read_field(&clean_input, "id")?;
-        let created_on = Metadata::read_field(&clean_input, "createdOn")
-            .or_else(|| Metadata::read_field(&clean_input, "created_on"))?;
-
-        Some(Metadata {
-            id,
-            created_on: created_on.parse().ok()?
-        })
-    }
-

     pub fn read_or_create(file_path: &PathBuf) -> Metadata {
         match Metadata::read_metadata_file(file_path) {
             Some(metadata) => metadata,
             None => {
                 let timestamp = SystemTime::now()
                     .duration_since(UNIX_EPOCH)
     pub fn read_or_create(file_path: &PathBuf) -> Metadata {
         match Metadata::read_metadata_file(file_path) {
             Some(metadata) => metadata,
             None => {
                 let timestamp = SystemTime::now()
                     .duration_since(UNIX_EPOCH)

-                    .map(|duration| duration.as_millis() as u128)
+                    .map(|duration| duration.as_millis() as u64)

                     .unwrap_or_else(|_| 0);
                 return Metadata {
                     id: timestamp.to_string(),
                     .unwrap_or_else(|_| 0);
                 return Metadata {
                     id: timestamp.to_string(),


@@ -45,26 +30,18 @@ impl Metadata {
         }
     }
 
         }
     }
 

+    pub fn created_on_utc(&self) -> Option<String> {
+        let date = OffsetDateTime::from_unix_timestamp_nanos(
+            (self.created_on * 1_000_000).into()
+        ).ok()?;
+        return date.format(&Rfc2822).ok();
+    }
+
+

     fn read_metadata_file(file_path: &PathBuf) -> Option<Metadata> {
         let mut file = File::open(file_path).ok()?;
         let mut contents = String::new();
         file.read_to_string(&mut contents).ok()?;
     fn read_metadata_file(file_path: &PathBuf) -> Option<Metadata> {
         let mut file = File::open(file_path).ok()?;
         let mut contents = String::new();
         file.read_to_string(&mut contents).ok()?;

-        Metadata::deserialize(&contents)
-    }
-
-
-    fn read_field(input: &str, field_name: &str) -> Option<String> {
-        let key_pattern = format!(r#""{}":""#, field_name);
-        input.find(&key_pattern)
-            .and_then(|start| {
-                let value_start = start + key_pattern.len();
-                let value_end = input[value_start..]
-                    .find(|c: char| c == ',' || c == '}' || c == '\n')
-                    .unwrap_or_else(|| input[value_start..].len()) + value_start;
-
-                let raw_value = &input[value_start..value_end];
-                let value = raw_value.trim_matches('"').to_string();
-                Some(value)
-            })
+        serde_json::from_str(&contents).ok()

     }
 }
     }
 }