109 lines
3.6 KiB
Rust
109 lines
3.6 KiB
Rust
use std::error::Error;
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use anyhow::Result;
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use diesel::prelude::*;
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use diesel::query_dsl::BelongingToDsl;
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use crate::{models::{
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conversation::{
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self, Conversation, DbConversation
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}, participant::{ConversationParticipant, DbParticipant, Participant}
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}, schema};
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use diesel_migrations::{embed_migrations, EmbeddedMigrations, MigrationHarness};
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pub const MIGRATIONS: EmbeddedMigrations = embed_migrations!();
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pub struct ChatDatabase {
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db: SqliteConnection,
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}
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impl ChatDatabase {
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pub fn new_in_memory() -> Result<Self> {
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let mut db = SqliteConnection::establish(":memory:")?;
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db.run_pending_migrations(MIGRATIONS)
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.map_err(|e| anyhow::anyhow!("Error running migrations: {}", e))?;
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return Ok(Self {
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db: db,
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})
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}
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pub fn insert_conversation(&mut self, conversation: Conversation) -> Result<()> {
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use crate::schema::conversations::dsl::*;
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use crate::schema::participants::dsl::*;
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use crate::schema::conversation_participants::dsl::*;
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let (db_conversation, db_participants) = conversation.into();
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diesel::replace_into(conversations)
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.values(&db_conversation)
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.execute(&mut self.db)?;
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diesel::replace_into(participants)
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.values(&db_participants)
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.execute(&mut self.db)?;
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// Sqlite backend doesn't support batch insert, so we have to do this manually
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for participant in db_participants {
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let pid = participants
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.select(schema::participants::id)
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.filter(schema::participants::display_name.eq(&participant.display_name))
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.first::<i32>(&mut self.db)?;
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diesel::replace_into(conversation_participants)
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.values((
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conversation_id.eq(&db_conversation.id),
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participant_id.eq(pid),
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))
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.execute(&mut self.db)?;
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}
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Ok(())
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}
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pub fn get_conversation_by_guid(&mut self, match_guid: &str) -> Result<Option<Conversation>> {
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use crate::schema::conversations::dsl::*;
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use crate::schema::participants::dsl::*;
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let result = conversations
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.find(match_guid)
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.first::<DbConversation>(&mut self.db)
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.optional()?;
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if let Some(conversation) = result {
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let dbParticipants = ConversationParticipant::belonging_to(&conversation)
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.inner_join(participants)
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.select(DbParticipant::as_select())
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.load::<DbParticipant>(&mut self.db)?;
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let mut modelConversation: Conversation = conversation.into();
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modelConversation.participants = dbParticipants.into_iter().map(|p| p.into()).collect();
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return Ok(Some(modelConversation));
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}
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Ok(None)
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}
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pub fn all_conversations(&mut self) -> Result<Vec<Conversation>> {
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use crate::schema::conversations::dsl::*;
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use crate::schema::participants::dsl::*;
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let db_conversations = conversations
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.load::<DbConversation>(&mut self.db)?;
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let mut result = Vec::new();
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for db_conversation in db_conversations {
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let db_participants = ConversationParticipant::belonging_to(&db_conversation)
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.inner_join(participants)
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.select(DbParticipant::as_select())
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.load::<DbParticipant>(&mut self.db)?;
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let mut model_conversation: Conversation = db_conversation.into();
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model_conversation.participants = db_participants.into_iter().map(|p| p.into()).collect();
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result.push(model_conversation);
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}
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Ok(result)
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}
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} |