Can open new conversations

src/helpers/conversations_helper.rs

@@ -2,7 +2,7 @@
 //!
 //! @author Pierre Hubert
 
-use crate::constants::database_tables_names::{CONV_LIST_TABLE, CONV_USERS_TABLE};
+use crate::constants::database_tables_names::{CONV_LIST_TABLE, CONV_USERS_TABLE, CONV_MESSAGES_TABLE};
 use crate::data::conversation::Conversation;
 use crate::data::error::{ExecError, ResultBoxError};
 use crate::data::new_conversation::NewConversation;
@@ -10,6 +10,7 @@ use crate::data::user::UserID;
 use crate::helpers::database::InsertQuery;
 use crate::helpers::database;
 use crate::utils::date_utils::time;
+use crate::data::conversation_message::ConversationMessage;
 
 /// Create a new conversation. This method returns the ID of the created conversation
 pub fn create(conv: &NewConversation) -> ResultBoxError<u64> {
@@ -199,6 +200,19 @@ pub fn find_private(user_1: UserID, user_2: UserID) -> ResultBoxError<Vec<u64>>
         .exec(|f|f.get_u64("conv_id"))
 }
 
+/// Get the last messages posted in a conversation
+pub fn get_last_messages(conv_id: u64, number_of_messages: u64) -> ResultBoxError<Vec<ConversationMessage>> {
+    database::QueryInfo::new(CONV_MESSAGES_TABLE)
+        .cond_u64("conv_id", conv_id)
+        .set_limit(number_of_messages)
+        .set_order("id DESC")
+        .exec(db_to_conversation_message)
+        .map(|mut l| {
+            l.sort_by(|a,b| a.id.partial_cmp(&b.id).unwrap());
+            l
+        })
+}
+
 /// Turn a database entry into a ConversationInfo object
 fn db_to_conversation_info(row: &database::RowResult) -> ResultBoxError<Conversation> {
     let conv_id = row.get_u64("id")?;
@@ -213,4 +227,17 @@ fn db_to_conversation_info(row: &database::RowResult) -> ResultBoxError<Conversa
         following: row.get_legacy_bool("following")?,
         saw_last_message: row.get_legacy_bool("saw_last_message")?,
     })
+}
+
+
+/// Turn a database entry into a ConversationMessgae object
+fn db_to_conversation_message(row: &database::RowResult) -> ResultBoxError<ConversationMessage> {
+    Ok(ConversationMessage {
+        id: row.get_u64("id")?,
+        time_sent: row.get_u64("time_insert")?,
+        conv_id: row.get_u64("conv_id")?,
+        user_id: row.get_user_id("user_id")?,
+        message: row.get_optional_str("message")?,
+        image_path: row.get_optional_str("image_path")?
+    })
 }

src/helpers/database.rs

@@ -150,6 +150,12 @@ impl QueryInfo {
         self
     }
 
+    /// Set the limit for the request
+    pub fn set_limit(mut self, value: u64) -> QueryInfo {
+        self.limit = value;
+        self
+    }
+
     /// Set results ordering
     pub fn set_order(mut self, order: &str) -> QueryInfo {
         self.order = Some(order.to_string());