Sketch out fetch of posts for date

Cargo.toml

@@ -6,3 +6,10 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+anyhow = "1.0.71"
+chrono = "0.4.26"
+env_logger = "0.10.0"
+html2md = "0.2.14"
+megalodon = "0.8.3"
+rss = "2.0.4"
+tokio = { version = "1.28.2", features = ["default", "full"] }

src/main.rs

@@ -1,3 +1,78 @@
-fn main() {
-    println!("Hello, world!");
+use anyhow::{format_err, Result};
+use chrono::{DateTime, Local, NaiveDate, TimeZone, Utc};
+use html2md::parse_html;
+use megalodon::{generator, megalodon::GetLocalTimelineInputOptions, response::Response};
+use std::env;
+
+#[derive(Debug)]
+struct Post {
+    content: String,
+    created_at: DateTime<Utc>,
+}
+
+#[tokio::main]
+async fn main() -> Result<()> {
+    env_logger::init();
+
+    let start = Local
+        .from_local_datetime(
+            &NaiveDate::from_ymd_opt(2023, 7, 1)
+                .ok_or_else(|| format_err!("Invallid date!"))?
+                .and_hms_opt(0, 0, 0)
+                .expect("Failed to construct time!"),
+        )
+        .unwrap();
+
+    let end = Local
+        .from_local_datetime(
+            &NaiveDate::from_ymd_opt(2023, 7, 1)
+                .ok_or_else(|| format_err!("Invallid date!"))?
+                .and_hms_opt(23, 59, 59)
+                .expect("Failed to construct time!"),
+        )
+        .unwrap();
+
+    println!("Date {:#?}", start);
+
+    let url = env::var("MASTODON_URL")?;
+    let token = env::var("MASTODON_ACCESS_TOKEN")?;
+    let client = generator(megalodon::SNS::Mastodon, url, Some(token), None);
+    let mut max_id: Option<String> = None;
+    loop {
+        let Response { json, .. } = if let Some(max_id) = max_id.as_ref() {
+            client
+                .get_local_timeline(Some(&GetLocalTimelineInputOptions {
+                    max_id: Some(max_id.clone()),
+                    ..GetLocalTimelineInputOptions::default()
+                }))
+                .await?
+        } else {
+            client.get_local_timeline(None).await?
+        };
+
+        if let Some(last) = json.last() {
+            println!(
+                "Checking {:?} against {:?}: {}",
+                last.created_at,
+                start,
+                last.created_at > start
+            );
+            if last.created_at > start {
+                max_id.replace(last.id.clone());
+                continue;
+            }
+        }
+        println!(
+            "{:#?}",
+            json.iter()
+                .filter(|json| start <= json.created_at && json.created_at <= end)
+                .map(|json| Post {
+                    content: parse_html(&json.content),
+                    created_at: json.created_at
+                })
+                .collect::<Vec<Post>>()
+        );
+        break;
+    }
+    Ok(())
 }