jrnl: put modules in its own respective files

programs/jrnl/src/md.rs

@@ -0,0 +1,59 @@
+use chrono::{DateTime, FixedOffset};
+use markdown::{Block, Span};
+
+#[derive(Debug)]
+pub struct Doc {
+    pub title: Vec<Span>,
+    pub entries: Vec<Entry>,
+}
+
+impl Doc {
+    pub fn new(f: &str) -> Self {
+        let mut entries = Vec::new();
+        let mut doc_title = vec![Span::Text("Journal".to_owned())];
+        let toks = markdown::tokenize(f);
+        let mut current = None;
+
+        for tok in toks {
+            match tok {
+                Block::Header(title, 1) => doc_title = title,
+                Block::Header(entry_title, 2) => {
+                    if let Some(cur) = current.take() {
+                        entries.push(cur);
+                    }
+
+                    let Some(Span::Text(title)) = entry_title.first() else {
+                        eprintln!("Error: Titles should be text.");
+                        std::process::exit(1);
+                    };
+
+                    let (ts, entry_title) = title.split_once(": ").unwrap();
+                    let ts = DateTime::parse_from_rfc3339(ts).unwrap();
+                    // let ts = PrimitiveDateTime::parse(ts, &DT_FORMAT).unwrap();
+
+                    current = Some(Entry {
+                        timestamp: ts,
+                        title: entry_title.to_owned(),
+                        content: Vec::new(),
+                    });
+                }
+                other => current.as_mut().unwrap().content.push(other),
+            }
+        }
+        if let Some(cur) = current {
+            entries.push(cur);
+        }
+
+        Self {
+            title: doc_title,
+            entries,
+        }
+    }
+}
+
+#[derive(Debug)]
+pub struct Entry {
+    pub timestamp: DateTime<FixedOffset>,
+    pub title: String,
+    pub content: Vec<Block>,
+}