1 files changed, 80 insertions, 0 deletions
diff --git a/src/stream/verb.rs b/src/stream/verb.rs
new file mode 100644
index 0000000..75a8dac
--- /dev/null
+++ b/src/stream/verb.rs
@@ -0,0 +1,80 @@
+/**
+ * Code to represent an activitystreams verb.
+ *
+ * SPDX-FileCopyrightText: 2023 Eilertsens Kodeknekkeri
+ * SPDX-FileCopyrightText: 2023 Harald Eilertsen <haraldei@anduin.net>
+ *
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+use serde::Deserialize;
+
+#[derive(Debug, PartialEq)]
+pub enum Verb {
+    Post,
+    Like,
+    Update,
+}
+
+impl<'de> Deserialize<'de> for Verb {
+    fn deserialize<D>(deserializer: D) -> Result<Verb, D::Error>
+        where
+            D: serde::de::Deserializer<'de>,
+    {
+        deserializer.deserialize_str(VerbVisitor)
+    }
+}
+
+struct VerbVisitor;
+
+impl<'de> serde::de::Visitor<'de> for VerbVisitor {
+    type Value = Verb;
+
+    fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
+        write!(formatter, "a valid activity streams verb URI")
+    }
+
+    fn visit_str<E>(self, s: &str) -> Result<Self::Value, E>
+        where
+            E: serde::de::Error,
+    {
+        match s {
+            "http://activitystrea.ms/schema/1.0/post" =>
+                Ok(Verb::Post),
+            "http://activitystrea.ms/schema/1.0/like" =>
+                Ok(Verb::Like),
+            "http://activitystrea.ms/schema/1.0/update" =>
+                Ok(Verb::Update),
+            _ =>
+                Err(E::custom(format!("unknown activity streams verb")))
+        }
+    }
+}
+
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn deserialize_activitustreams_verb_from_json() {
+        #[derive(Debug, Deserialize, PartialEq)]
+        struct VerbTest {
+            verb: Verb
+        }
+
+        let verbs = vec![
+            (Verb::Post, "post"),
+            (Verb::Like, "like"),
+            (Verb::Update, "update")
+        ];
+
+        for v in verbs {
+            let verb: VerbTest = serde_json::from_str(
+                &format!(r#"{{"verb": "http://activitystrea.ms/schema/1.0/{}"}}"#, v.1)
+            ).unwrap();
+            assert_eq!(v.0, verb.verb);
+        }
+
+    }
+}