Implement working database

src/word.rs

@@ -1,11 +1,26 @@
 use chrono::{DateTime, Utc};
 use serde::Serialize;
+use jisho::Entry;
+use std::convert::From;
 
 #[derive(Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct Word {
-    pub id: i64,
+    #[serde(skip_serializing)]
+    pub id: Option<i64>,
     pub word: String,
     pub reading: String,
-    pub timestamp: DateTime<Utc>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub timestamp: Option<DateTime<Utc>>,
+}
+
+impl From<Entry> for Word {
+    fn from(entry: Entry) -> Self {
+        Self {
+            id: None,
+            word: entry.kanji,
+            reading: entry.reading,
+            timestamp: None,
+        }
+    }
 }