// Code generated by software.amazon.smithy.rust.codegen.smithy-rs. DO NOT EDIT.
/// Paginator for [`DescribeDocumentVersions`](crate::operation::DescribeDocumentVersions)
pub struct DescribeDocumentVersionsPaginator {
    handle: std::sync::Arc<crate::client::Handle>,
    builder: crate::input::describe_document_versions_input::Builder,
}

impl DescribeDocumentVersionsPaginator {
    /// Create a new paginator-wrapper
    pub(crate) fn new(
        handle: std::sync::Arc<crate::client::Handle>,
        builder: crate::input::describe_document_versions_input::Builder,
    ) -> Self {
        Self { handle, builder }
    }

    /// Set the page size
    ///
    /// _Note: this method will override any previously set value for `limit`_
    pub fn page_size(mut self, limit: i32) -> Self {
        self.builder.limit = Some(limit);
        self
    }

    /// Create a flattened paginator
    ///
    /// This paginator automatically flattens results using `document_versions`. Queries to the underlying service
    /// are dispatched lazily.
    pub fn items(self) -> crate::paginator::DescribeDocumentVersionsPaginatorItems {
        crate::paginator::DescribeDocumentVersionsPaginatorItems(self)
    }

    /// Create the pagination stream
    ///
    /// _Note:_ No requests will be dispatched until the stream is used (eg. with [`.next().await`](tokio_stream::StreamExt::next)).
    pub fn send(
        self,
    ) -> impl tokio_stream::Stream<
        Item = std::result::Result<
            crate::output::DescribeDocumentVersionsOutput,
            aws_smithy_http::result::SdkError<crate::error::DescribeDocumentVersionsError>,
        >,
    > + Unpin {
        // Move individual fields out of self for the borrow checker
        let builder = self.builder;
        let handle = self.handle;
        aws_smithy_async::future::fn_stream::FnStream::new(move |tx| {
            Box::pin(async move {
                // Build the input for the first time. If required fields are missing, this is where we'll produce an early error.
                let mut input = match builder.build().map_err(|err| {
                    aws_smithy_http::result::SdkError::ConstructionFailure(err.into())
                }) {
                    Ok(input) => input,
                    Err(e) => {
                        let _ = tx.send(Err(e)).await;
                        return;
                    }
                };
                loop {
                    let op = match input.make_operation(&handle.conf).await.map_err(|err| {
                        aws_smithy_http::result::SdkError::ConstructionFailure(err.into())
                    }) {
                        Ok(op) => op,
                        Err(e) => {
                            let _ = tx.send(Err(e)).await;
                            return;
                        }
                    };
                    let resp = handle.client.call(op).await;
                    // If the input member is None or it was an error
                    let done = match resp {
                        Ok(ref resp) => {
                            let new_token = crate::lens::reflens_structure_crate_output_describe_document_versions_output_marker(resp);
                            let is_empty = new_token.map(|token| token.is_empty()).unwrap_or(true);
                            if !is_empty && new_token == input.marker.as_ref() {
                                let _ = tx.send(Err(aws_smithy_http::result::SdkError::ConstructionFailure("next token did not change, aborting paginator. This indicates an SDK or AWS service bug.".into()))).await;
                                return;
                            }
                            input.marker = new_token.cloned();
                            is_empty
                        }
                        Err(_) => true,
                    };
                    if tx.send(resp).await.is_err() {
                        // receiving end was dropped
                        return;
                    }
                    if done {
                        return;
                    }
                }
            })
        })
    }
}

/// Paginator for [`DescribeFolderContents`](crate::operation::DescribeFolderContents)
pub struct DescribeFolderContentsPaginator {
    handle: std::sync::Arc<crate::client::Handle>,
    builder: crate::input::describe_folder_contents_input::Builder,
}

impl DescribeFolderContentsPaginator {
    /// Create a new paginator-wrapper
    pub(crate) fn new(
        handle: std::sync::Arc<crate::client::Handle>,
        builder: crate::input::describe_folder_contents_input::Builder,
    ) -> Self {
        Self { handle, builder }
    }

    /// Set the page size
    ///
    /// _Note: this method will override any previously set value for `limit`_
    pub fn page_size(mut self, limit: i32) -> Self {
        self.builder.limit = Some(limit);
        self
    }

    /// Create the pagination stream
    ///
    /// _Note:_ No requests will be dispatched until the stream is used (eg. with [`.next().await`](tokio_stream::StreamExt::next)).
    pub fn send(
        self,
    ) -> impl tokio_stream::Stream<
        Item = std::result::Result<
            crate::output::DescribeFolderContentsOutput,
            aws_smithy_http::result::SdkError<crate::error::DescribeFolderContentsError>,
        >,
    > + Unpin {
        // Move individual fields out of self for the borrow checker
        let builder = self.builder;
        let handle = self.handle;
        aws_smithy_async::future::fn_stream::FnStream::new(move |tx| {
            Box::pin(async move {
                // Build the input for the first time. If required fields are missing, this is where we'll produce an early error.
                let mut input = match builder.build().map_err(|err| {
                    aws_smithy_http::result::SdkError::ConstructionFailure(err.into())
                }) {
                    Ok(input) => input,
                    Err(e) => {
                        let _ = tx.send(Err(e)).await;
                        return;
                    }
                };
                loop {
                    let op = match input.make_operation(&handle.conf).await.map_err(|err| {
                        aws_smithy_http::result::SdkError::ConstructionFailure(err.into())
                    }) {
                        Ok(op) => op,
                        Err(e) => {
                            let _ = tx.send(Err(e)).await;
                            return;
                        }
                    };
                    let resp = handle.client.call(op).await;
                    // If the input member is None or it was an error
                    let done = match resp {
                        Ok(ref resp) => {
                            let new_token = crate::lens::reflens_structure_crate_output_describe_folder_contents_output_marker(resp);
                            let is_empty = new_token.map(|token| token.is_empty()).unwrap_or(true);
                            if !is_empty && new_token == input.marker.as_ref() {
                                let _ = tx.send(Err(aws_smithy_http::result::SdkError::ConstructionFailure("next token did not change, aborting paginator. This indicates an SDK or AWS service bug.".into()))).await;
                                return;
                            }
                            input.marker = new_token.cloned();
                            is_empty
                        }
                        Err(_) => true,
                    };
                    if tx.send(resp).await.is_err() {
                        // receiving end was dropped
                        return;
                    }
                    if done {
                        return;
                    }
                }
            })
        })
    }
}

/// Paginator for [`DescribeUsers`](crate::operation::DescribeUsers)
pub struct DescribeUsersPaginator {
    handle: std::sync::Arc<crate::client::Handle>,
    builder: crate::input::describe_users_input::Builder,
}

impl DescribeUsersPaginator {
    /// Create a new paginator-wrapper
    pub(crate) fn new(
        handle: std::sync::Arc<crate::client::Handle>,
        builder: crate::input::describe_users_input::Builder,
    ) -> Self {
        Self { handle, builder }
    }

    /// Set the page size
    ///
    /// _Note: this method will override any previously set value for `limit`_
    pub fn page_size(mut self, limit: i32) -> Self {
        self.builder.limit = Some(limit);
        self
    }

    /// Create a flattened paginator
    ///
    /// This paginator automatically flattens results using `users`. Queries to the underlying service
    /// are dispatched lazily.
    pub fn items(self) -> crate::paginator::DescribeUsersPaginatorItems {
        crate::paginator::DescribeUsersPaginatorItems(self)
    }

    /// Create the pagination stream
    ///
    /// _Note:_ No requests will be dispatched until the stream is used (eg. with [`.next().await`](tokio_stream::StreamExt::next)).
    pub fn send(
        self,
    ) -> impl tokio_stream::Stream<
        Item = std::result::Result<
            crate::output::DescribeUsersOutput,
            aws_smithy_http::result::SdkError<crate::error::DescribeUsersError>,
        >,
    > + Unpin {
        // Move individual fields out of self for the borrow checker
        let builder = self.builder;
        let handle = self.handle;
        aws_smithy_async::future::fn_stream::FnStream::new(move |tx| {
            Box::pin(async move {
                // Build the input for the first time. If required fields are missing, this is where we'll produce an early error.
                let mut input = match builder.build().map_err(|err| {
                    aws_smithy_http::result::SdkError::ConstructionFailure(err.into())
                }) {
                    Ok(input) => input,
                    Err(e) => {
                        let _ = tx.send(Err(e)).await;
                        return;
                    }
                };
                loop {
                    let op = match input.make_operation(&handle.conf).await.map_err(|err| {
                        aws_smithy_http::result::SdkError::ConstructionFailure(err.into())
                    }) {
                        Ok(op) => op,
                        Err(e) => {
                            let _ = tx.send(Err(e)).await;
                            return;
                        }
                    };
                    let resp = handle.client.call(op).await;
                    // If the input member is None or it was an error
                    let done = match resp {
                        Ok(ref resp) => {
                            let new_token = crate::lens::reflens_structure_crate_output_describe_users_output_marker(resp);
                            let is_empty = new_token.map(|token| token.is_empty()).unwrap_or(true);
                            if !is_empty && new_token == input.marker.as_ref() {
                                let _ = tx.send(Err(aws_smithy_http::result::SdkError::ConstructionFailure("next token did not change, aborting paginator. This indicates an SDK or AWS service bug.".into()))).await;
                                return;
                            }
                            input.marker = new_token.cloned();
                            is_empty
                        }
                        Err(_) => true,
                    };
                    if tx.send(resp).await.is_err() {
                        // receiving end was dropped
                        return;
                    }
                    if done {
                        return;
                    }
                }
            })
        })
    }
}

/// Flattened paginator for `DescribeDocumentVersionsPaginator`
///
/// This is created with [`.items()`](DescribeDocumentVersionsPaginator::items)
pub struct DescribeDocumentVersionsPaginatorItems(DescribeDocumentVersionsPaginator);

impl DescribeDocumentVersionsPaginatorItems {
    /// Create the pagination stream
    ///
    /// _Note: No requests will be dispatched until the stream is used (eg. with [`.next().await`](tokio_stream::StreamExt::next))._
    ///
    /// To read the entirety of the paginator, use [`.collect::<Result<Vec<_>, _>()`](tokio_stream::StreamExt::collect).
    pub fn send(
        self,
    ) -> impl tokio_stream::Stream<
        Item = std::result::Result<
            crate::model::DocumentVersionMetadata,
            aws_smithy_http::result::SdkError<crate::error::DescribeDocumentVersionsError>,
        >,
    > + Unpin {
        aws_smithy_async::future::fn_stream::TryFlatMap::new(self.0.send()).flat_map(|page| crate::lens::lens_structure_crate_output_describe_document_versions_output_document_versions(page).unwrap_or_default().into_iter())
    }
}

/// Flattened paginator for `DescribeUsersPaginator`
///
/// This is created with [`.items()`](DescribeUsersPaginator::items)
pub struct DescribeUsersPaginatorItems(DescribeUsersPaginator);

impl DescribeUsersPaginatorItems {
    /// Create the pagination stream
    ///
    /// _Note: No requests will be dispatched until the stream is used (eg. with [`.next().await`](tokio_stream::StreamExt::next))._
    ///
    /// To read the entirety of the paginator, use [`.collect::<Result<Vec<_>, _>()`](tokio_stream::StreamExt::collect).
    pub fn send(
        self,
    ) -> impl tokio_stream::Stream<
        Item = std::result::Result<
            crate::model::User,
            aws_smithy_http::result::SdkError<crate::error::DescribeUsersError>,
        >,
    > + Unpin {
        aws_smithy_async::future::fn_stream::TryFlatMap::new(self.0.send()).flat_map(|page| {
            crate::lens::lens_structure_crate_output_describe_users_output_users(page)
                .unwrap_or_default()
                .into_iter()
        })
    }
}