Add get_fields_to_validate_for_member()

src/process.rs

@@ -140,6 +140,30 @@ impl ProcessState {
         self.encrypted_pcd == Value::Null || 
             self.pcd_commitment == Value::Null
     }
+
+    pub fn get_fields_to_validate_for_member(&self, member: &Member) -> anyhow::Result<Vec<String>> {
+        let decrypted = self.decrypt_pcd()?;
+
+        let roles = decrypted.extract_roles()?;
+
+        let mut res: HashSet<String> = HashSet::new();
+
+        // Are we in that role?
+        for (_, role_def) in roles {
+            if !role_def.members.contains(member) {
+                continue;
+            } else {
+                // what are the fields we can modify?
+                for rule in role_def.validation_rules {
+                    if rule.allows_modification() {
+                        res.extend(rule.fields.iter().map(|f| f.clone()));
+                    }
+                }
+            }
+        }
+
+        Ok(res.into_iter().collect())
+    }
 }
 
 /// A process is basically a succession of states