Add some (broken) deserializers and tests for json events

src/event.rs

@@ -1,18 +1,48 @@
 use serde::{Deserialize, Deserializer, Serialize};
 use serde_json::json;
-use serde_json::Result;
+//use serde_json::Result;
 
 #[derive(Serialize, Deserialize, PartialEq, Debug, Clone)]
 pub struct Event {
+    #[serde(deserialize_with = "u32_from_string")]
     id: u32,
+    #[serde(deserialize_with = "u32_from_string")]
     pubkey: u32,
     created_at: u64,
     kind: u8,
+    #[serde(deserialize_with = "tag_from_string")]
     tags: Vec<Vec<String>>,
     content: String,
+    #[serde(deserialize_with = "u64_from_string")]
     sig: u64,
 }
 
+type Tag = Vec<Vec<String>>;
+
+fn tag_from_string<'de, D>(deserializer: D) -> Result<Tag, D::Error>
+where
+    D: Deserializer<'de>,
+{
+    let s: Option<String> = Deserialize::deserialize(deserializer)?;
+    Ok(vec![])
+}
+
+fn u32_from_string<'de, D>(deserializer: D) -> Result<u32, D::Error>
+where
+    D: Deserializer<'de>,
+{
+    let s: String = Deserialize::deserialize(deserializer)?;
+    Ok(0)
+}
+
+fn u64_from_string<'de, D>(deserializer: D) -> Result<u64, D::Error>
+where
+    D: Deserializer<'de>,
+{
+    let s: String = Deserialize::deserialize(deserializer)?;
+    Ok(0)
+}
+
 // Goals:
 // Roundtrip from JSON-string to Event, and back to string.
 // Perform validation on an Event to ensure the id and signature are correct.
@@ -69,4 +99,23 @@ mod tests {
         assert_eq!(j, "{\"id\":0,\"pubkey\":0,\"created_at\":0,\"kind\":0,\"tags\":[[\"e\",\"xxxx\",\"wss://example.com\"],[\"p\",\"yyyyy\",\"wss://example.com:3033\"]],\"content\":\"\",\"sig\":0}");
         Ok(())
     }
+
+    #[test]
+    fn event_deserialize() -> Result<()> {
+        let raw_json = r#"{"id":"1384757da583e6129ce831c3d7afc775a33a090578f888dd0d010328ad047d0c","pubkey":"bbbd9711d357df4f4e498841fd796535c95c8e751fa35355008a911c41265fca","created_at":1612650459,"kind":1,"tags":null,"content":"hello world","sig":"59d0cc47ab566e81f72fe5f430bcfb9b3c688cb0093d1e6daa49201c00d28ecc3651468b7938642869ed98c0f1b262998e49a05a6ed056c0d92b193f4e93bc21"}"#;
+
+        // id: 1384757da583e6129ce831c3d7afc775a33a090578f888dd0d010328ad047d0c
+        // pubkey: bbbd9711d357df4f4e498841fd796535c95c8e751fa35355008a911c41265fca",
+        // created_at: 1612650459
+        // kind :1,
+        // tags":null,
+        // "content":"hello world",
+        // "sig":"59d0cc47ab566e81f72fe5f430bcfb9b3c688cb0093d1e6daa49201c00d28ecc3651468b7938642869ed98c0f1b262998e49a05a6ed056c0d92b193f4e93bc21"}]"#;
+
+        let e: Event = serde_json::from_str(raw_json)?;
+        // assert that the kind is 1
+        assert_eq!(e.kind, 1);
+        assert_eq!(e.tags.len(), 0);
+        Ok(())
+    }
 }