liboxen 0.48.3

Oxen is a fast, unstructured data version control, to help version large machine learning datasets written in Rust.
Documentation 
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use serde::{Deserialize, Serialize};
use utoipa::ToSchema;

use crate::{
    error::OxenError,
    model::{diff::AddRemoveModifyCounts, merkle_tree::node::DirNode},
};

#[derive(Deserialize, Serialize, Debug, Clone, ToSchema)]
pub struct DirDiffSummary {
    pub dir: DirDiffSummaryImpl,
}

// Impl is so that we can wrap the json response in the "dir" field to make summaries easier to distinguish
#[derive(Deserialize, Serialize, Debug, Clone, ToSchema)]
pub struct DirDiffSummaryImpl {
    pub file_counts: AddRemoveModifyCounts,
}

impl DirDiffSummary {
    pub fn from_dir_nodes(
        base_entry: &Option<DirNode>,
        head_entry: &Option<DirNode>,
    ) -> Result<DirDiffSummary, OxenError> {
        match (base_entry, head_entry) {
            (Some(base_entry), Some(head_entry)) => {
                let base_num_files = base_entry.num_files();
                let head_num_files = head_entry.num_files();

                let num_added_files = head_num_files.saturating_sub(base_num_files);

                let num_removed_files = base_num_files.saturating_sub(head_num_files);

                Ok(DirDiffSummary {
                    dir: DirDiffSummaryImpl {
                        file_counts: AddRemoveModifyCounts {
                            added: num_added_files as usize,
                            removed: num_removed_files as usize,
                            modified: 0,
                        },
                    },
                })
            }
            (Some(base_entry), None) => {
                let num_files = base_entry.num_files();

                Ok(DirDiffSummary {
                    dir: DirDiffSummaryImpl {
                        file_counts: AddRemoveModifyCounts {
                            added: 0,
                            removed: num_files as usize,
                            modified: 0,
                        },
                    },
                })
            }

            (None, Some(head_entry)) => {
                let num_files = head_entry.num_files();

                Ok(DirDiffSummary {
                    dir: DirDiffSummaryImpl {
                        file_counts: AddRemoveModifyCounts {
                            added: num_files as usize,
                            removed: 0,
                            modified: 0,
                        },
                    },
                })
            }

            (None, None) => Ok(DirDiffSummary {
                dir: DirDiffSummaryImpl {
                    file_counts: AddRemoveModifyCounts {
                        added: 0,
                        removed: 0,
                        modified: 0,
                    },
                },
            }),
        }
    }
}