dinoco 0.0.7

A modern Rust ORM for schema-driven queries, migrations, and database operations.
Documentation 
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use std::marker::PhantomData;

use chrono::{DateTime, Utc};

use dinoco_engine::{DinocoAdapter, DinocoClient, Expression, SelectStatement};

use crate::{
    CountNode, IncludeNode, IntoCountNode, IntoIncludeNode, Model, OrderBy, Projection, ProjectionModel, ReadMode,
    execute_many,
    queue::{QueueDispatch, enqueue_find_statement},
};

#[derive(Debug, Clone)]
pub struct FindMany<M, S = M> {
    pub statement: SelectStatement,
    pub includes: Vec<IncludeNode>,
    pub counts: Vec<CountNode>,
    pub read_mode: ReadMode,
    pub(crate) queue: Option<QueueDispatch>,
    marker: PhantomData<fn() -> (M, S)>,
}

pub fn find_many<S>() -> FindMany<S::Model, S>
where
    S: ProjectionModel + Projection<S::Model>,
{
    FindMany {
        statement: SelectStatement::new().from(<S::Model as Model>::table_name()).select(S::columns()),
        includes: Vec::new(),
        counts: Vec::new(),
        read_mode: ReadMode::ReplicaPreferred,
        queue: None,
        marker: PhantomData,
    }
}

impl<M, S> FindMany<M, S>
where
    M: Model,
    S: Projection<M>,
{
    pub fn select<NS>(mut self) -> FindMany<M, NS>
    where
        NS: Projection<M>,
    {
        self.statement = self.statement.select(NS::columns());

        FindMany {
            statement: self.statement,
            includes: self.includes,
            counts: self.counts,
            read_mode: self.read_mode,
            queue: self.queue,
            marker: PhantomData,
        }
    }

    pub fn cond<F>(mut self, closure: F) -> Self
    where
        F: FnOnce(M::Where) -> Expression,
    {
        self.statement = self.statement.condition(closure(M::Where::default()));

        self
    }

    pub fn take(mut self, value: usize) -> Self {
        self.statement = self.statement.limit(value);

        self
    }

    pub fn skip(mut self, value: usize) -> Self {
        self.statement = self.statement.skip(value);

        self
    }

    pub fn order_by<F>(mut self, closure: F) -> Self
    where
        F: FnOnce(M::Where) -> OrderBy,
    {
        let order_by = closure(M::Where::default());

        self.statement = self.statement.order_by(order_by.column, order_by.direction);

        self
    }

    pub fn includes<F, I>(mut self, closure: F) -> Self
    where
        F: FnOnce(M::Include) -> I,
        I: IntoIncludeNode,
    {
        self.includes.push(closure(M::Include::default()).into_include_node());

        self
    }

    pub fn count<F, I>(mut self, closure: F) -> Self
    where
        F: FnOnce(M::Include) -> I,
        I: IntoCountNode,
    {
        self.counts.push(closure(M::Include::default()).into_count_node());

        self
    }

    pub fn read_in_primary(mut self) -> Self {
        self.read_mode = ReadMode::Primary;

        self
    }

    #[doc(hidden)]
    pub fn __enqueue(mut self, event: impl Into<String>) -> Self {
        self.queue = Some(QueueDispatch::immediate(event));

        self
    }

    #[doc(hidden)]
    pub fn __enqueue_in(mut self, event: impl Into<String>, delay_ms: u64) -> Self {
        self.queue = Some(QueueDispatch::in_milliseconds(event, delay_ms));

        self
    }

    #[doc(hidden)]
    pub fn __enqueue_at(mut self, event: impl Into<String>, execute_at: DateTime<Utc>) -> Self {
        self.queue = Some(QueueDispatch::at(event, execute_at));

        self
    }

    pub fn execute<'a, A>(
        self,
        client: &'a DinocoClient<A>,
    ) -> impl std::future::Future<Output = dinoco_engine::DinocoResult<Vec<S>>> + Send + 'a
    where
        A: DinocoAdapter,
    {
        async move {
            let statement = self.statement;
            let result =
                execute_many::<M, S, A>(statement.clone(), &self.includes, &self.counts, self.read_mode, client)
                    .await?;

            if let Some(queue) = &self.queue {
                enqueue_find_statement(client, queue, statement, false).await?;
            }

            Ok(result)
        }
    }
}