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@ -13,9 +13,11 @@ use ruma::{
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history_visibility::{HistoryVisibility, RoomHistoryVisibilityEventContent},
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history_visibility::{HistoryVisibility, RoomHistoryVisibilityEventContent},
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member::{MembershipState, RoomMemberEventContent},
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member::{MembershipState, RoomMemberEventContent},
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name::RoomNameEventContent,
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name::RoomNameEventContent,
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power_levels::{RoomPowerLevels, RoomPowerLevelsEventContent},
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},
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},
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StateEventType,
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StateEventType,
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},
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},
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state_res::Event,
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EventId, JsOption, OwnedServerName, OwnedUserId, RoomId, ServerName, UserId,
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EventId, JsOption, OwnedServerName, OwnedUserId, RoomId, ServerName, UserId,
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};
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};
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use serde_json::value::to_raw_value;
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use serde_json::value::to_raw_value;
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@ -351,4 +353,53 @@ impl Service {
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.map_err(|_| Error::bad_database("Invalid room member event in database."))
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.map_err(|_| Error::bad_database("Invalid room member event in database."))
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})
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})
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}
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}
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/// Checks if a given user can redact a given event
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///
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/// If federation is true, it allows redaction events from any user of the same server as the original event sender
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pub fn user_can_redact(
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&self,
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redacts: &EventId,
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sender: &UserId,
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room_id: &RoomId,
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federation: bool,
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) -> Result<bool> {
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self.room_state_get(room_id, &StateEventType::RoomPowerLevels, "")?
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.map(|e| {
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serde_json::from_str(e.content.get())
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.map(|c: RoomPowerLevelsEventContent| c.into())
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.map(|e: RoomPowerLevels| {
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e.user_can_redact_event_of_other(sender)
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|| e.user_can_redact_own_event(sender)
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&& if let Ok(Some(pdu)) = services().rooms.timeline.get_pdu(redacts)
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{
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if federation {
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pdu.sender().server_name() == sender.server_name()
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} else {
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pdu.sender == sender
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}
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} else {
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false
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}
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})
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.map_err(|_| {
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Error::bad_database("Invalid m.room.power_levels event in database")
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})
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})
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// Falling back on m.room.create to judge power levels
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.unwrap_or_else(|| {
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if let Some(pdu) = self.room_state_get(room_id, &StateEventType::RoomCreate, "")? {
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Ok(pdu.sender == sender
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|| if let Ok(Some(pdu)) = services().rooms.timeline.get_pdu(redacts) {
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pdu.sender == sender
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} else {
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false
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})
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} else {
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Err(Error::bad_database(
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"No m.room.power_levels or m.room.create events in database for room",
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))
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}
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})
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}
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}
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}
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