events: Add m.relates_to to poll start events

crates/ruma-common/src/events/poll/start.rs

@@ -10,7 +10,11 @@ mod poll_answers_serde;
 
 use poll_answers_serde::PollAnswersDeHelper;
 
-use crate::{events::message::TextContentBlock, serde::StringEnum, PrivOwnedStr};
+use crate::{
+    events::{message::TextContentBlock, room::message::Relation},
+    serde::StringEnum,
+    PrivOwnedStr,
+};
 
 use super::{
     compile_poll_results,
@@ -30,7 +34,7 @@ use super::{
 /// [`UnstablePollStartEventContent`]: super::unstable_start::UnstablePollStartEventContent
 #[derive(Clone, Debug, Serialize, Deserialize, EventContent)]
 #[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
-#[ruma_event(type = "m.poll.start", kind = MessageLike)]
+#[ruma_event(type = "m.poll.start", kind = MessageLike, without_relation)]
 pub struct PollStartEventContent {
     /// The poll content of the message.
     #[serde(rename = "m.poll")]
@@ -40,6 +44,14 @@ pub struct PollStartEventContent {
     #[serde(rename = "m.text")]
     pub text: TextContentBlock,
 
+    /// Information about related messages.
+    #[serde(
+        flatten,
+        skip_serializing_if = "Option::is_none",
+        deserialize_with = "crate::events::room::message::relation_serde::deserialize_relation"
+    )]
+    pub relates_to: Option<Relation<PollStartEventContentWithoutRelation>>,
+
     /// Whether this message is automated.
     #[cfg(feature = "unstable-msc3955")]
     #[serde(
@@ -57,6 +69,7 @@ impl PollStartEventContent {
         Self {
             poll,
             text,
+            relates_to: None,
             #[cfg(feature = "unstable-msc3955")]
             automated: false,
         }
@@ -65,12 +78,7 @@ impl PollStartEventContent {
     /// Creates a new `PollStartEventContent` with the given plain text fallback
     /// representation and poll content.
     pub fn with_plain_text(plain_text: impl Into<String>, poll: PollContentBlock) -> Self {
-        Self {
-            poll,
-            text: TextContentBlock::plain(plain_text),
-            #[cfg(feature = "unstable-msc3955")]
-            automated: false,
-        }
+        Self::new(TextContentBlock::plain(plain_text), poll)
     }
 }
 

crates/ruma-common/src/events/poll/unstable_start.rs

@@ -9,6 +9,8 @@ use serde::{Deserialize, Serialize};
 mod unstable_poll_answers_serde;
 mod unstable_poll_kind_serde;
 
+use crate::events::room::message::Relation;
+
 use self::unstable_poll_answers_serde::UnstablePollAnswersDeHelper;
 use super::{
     compile_unstable_poll_results, generate_poll_end_fallback_text,
@@ -29,7 +31,7 @@ use super::{
 /// [`PollStartEventContent`]: super::start::PollStartEventContent
 #[derive(Clone, Debug, Serialize, Deserialize, EventContent)]
 #[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
-#[ruma_event(type = "org.matrix.msc3381.poll.start", kind = MessageLike)]
+#[ruma_event(type = "org.matrix.msc3381.poll.start", kind = MessageLike, without_relation)]
 pub struct UnstablePollStartEventContent {
     /// The poll content of the message.
     #[serde(rename = "org.matrix.msc3381.poll.start")]
@@ -38,18 +40,26 @@ pub struct UnstablePollStartEventContent {
     /// Text representation of the message, for clients that don't support polls.
     #[serde(rename = "org.matrix.msc1767.text")]
     pub text: Option<String>,
+
+    /// Information about related messages.
+    #[serde(
+        flatten,
+        skip_serializing_if = "Option::is_none",
+        deserialize_with = "crate::events::room::message::relation_serde::deserialize_relation"
+    )]
+    pub relates_to: Option<Relation<UnstablePollStartEventContentWithoutRelation>>,
 }
 
 impl UnstablePollStartEventContent {
     /// Creates a new `PollStartEventContent` with the given poll content.
     pub fn new(poll_start: UnstablePollStartContentBlock) -> Self {
-        Self { poll_start, text: None }
+        Self { poll_start, text: None, relates_to: None }
     }
 
     /// Creates a new `PollStartEventContent` with the given plain text fallback
     /// representation and poll content.
     pub fn plain_text(text: impl Into<String>, poll_start: UnstablePollStartContentBlock) -> Self {
-        Self { poll_start, text: Some(text.into()) }
+        Self { poll_start, text: Some(text.into()), relates_to: None }
     }
 }
 

crates/ruma-common/tests/events/poll.rs

@@ -25,6 +25,7 @@ use ruma_common::{
             },
         },
         relation::Reference,
+        room::message::Relation,
         AnyMessageLikeEvent, MessageLikeEvent,
     },
     owned_event_id, MilliSecondsSinceUnixEpoch,
@@ -176,6 +177,33 @@ fn start_event_deserialization() {
                     },
                 ]
             },
+            "m.new_content": {
+                "m.text": [
+                    { "body": "How's the weather?\n1. Not bad…\n2. Fine.\n3. Amazing!" }
+                ],
+                "m.poll": {
+                    "question": { "m.text": [{ "body": "How's the weather?" }] },
+                    "max_selections": 2,
+                    "answers": [
+                        {
+                            "m.id": "not-bad",
+                            "m.text": [{ "body": "Not bad…" }],
+                        },
+                        {
+                            "m.id": "fine",
+                            "m.text": [{ "body": "Fine." }],
+                        },
+                        {
+                            "m.id": "amazing",
+                            "m.text": [{ "body": "Amazing!" }],
+                        },
+                    ]
+                },
+            },
+            "m.relates_to": {
+                "rel_type": "m.replace",
+                "event_id": "$previous_event_id",
+            },
         },
         "event_id": "$event:notareal.hs",
         "origin_server_ts": 134_829_848,
@@ -205,6 +233,7 @@ fn start_event_deserialization() {
     assert_eq!(answers[1].text[0].body, "Fine.");
     assert_eq!(answers[2].id, "amazing");
     assert_eq!(answers[2].text[0].body, "Amazing!");
+    assert_matches!(message_event.content.relates_to, Some(Relation::Replacement(_)));
 }
 
 #[test]
@@ -413,6 +442,31 @@ fn unstable_start_event_deserialization() {
                     },
                 ]
             },
+            "m.new_content": {
+                "org.matrix.msc1767.text": "How's the weather?\n1. Not bad…\n2. Fine.\n3. Amazing!",
+                "org.matrix.msc3381.poll.start": {
+                    "question": { "org.matrix.msc1767.text": "How's the weather?" },
+                    "max_selections": 2,
+                    "answers": [
+                        {
+                            "id": "not-bad",
+                            "org.matrix.msc1767.text": "Not bad…",
+                        },
+                        {
+                            "id": "fine",
+                            "org.matrix.msc1767.text": "Fine.",
+                        },
+                        {
+                            "id": "amazing",
+                            "org.matrix.msc1767.text": "Amazing!",
+                        },
+                    ]
+                },
+            },
+            "m.relates_to": {
+                "rel_type": "m.replace",
+                "event_id": "$previous_event_id",
+            },
         },
         "event_id": "$event:notareal.hs",
         "origin_server_ts": 134_829_848,
@@ -442,6 +496,7 @@ fn unstable_start_event_deserialization() {
     assert_eq!(answers[1].text, "Fine.");
     assert_eq!(answers[2].id, "amazing");
     assert_eq!(answers[2].text, "Amazing!");
+    assert_matches!(message_event.content.relates_to, Some(Relation::Replacement(_)));
 }
 
 #[test]