refactor: move readwise files to it's own binary

cli/bin/readwise/external_interface.rs

@@ -0,0 +1,41 @@
+use lib_sync_core::task_manager::TaskPayload;
+use chrono::{DateTime, Local};
+use serde::{de, Deserialize, Deserializer, Serialize};
+use serde_json::Value;
+use std::fmt::Display;
+
+#[derive(Deserialize, Serialize, Debug)]
+pub struct DocumentPayload {
+    title: String,
+    summary: Option<String>,
+    url: String,
+    #[serde(deserialize_with = "single_or_vec")]
+    tags: Vec<String>,
+    published_date: DateTime<Local>,
+    location: String,
+}
+
+impl Display for DocumentPayload {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(
+            f,
+            "{}",
+            serde_json::to_string_pretty(self).map_err(|_| std::fmt::Error)?
+        )
+    }
+}
+
+impl TaskPayload for DocumentPayload {
+    fn get_key(&self) -> String {
+        self.url.clone()
+    }
+}
+
+fn single_or_vec<'de, D: Deserializer<'de>>(deserializer: D) -> Result<Vec<String>, D::Error> {
+    Ok(match Value::deserialize(deserializer)? {
+        Value::String(s) => vec![s.parse().map_err(de::Error::custom)?],
+        Value::Array(arr) => arr.into_iter().map(|a| a.to_string()).collect(),
+        Value::Null => Vec::new(),
+        _ => return Err(de::Error::custom("wrong type")),
+    })
+}