use git_hash::ObjectId;

use crate::data;

/// An item representing a future Entry in the leanest way possible.
///
/// One can expect to have one of these in memory when building big objects, so smaller is better here.
/// They should contain everything of importance to generate a pack as fast as possible.
#[derive(PartialEq, Eq, Debug, Hash, Ord, PartialOrd, Clone)]
#[cfg_attr(feature = "serde1", derive(serde::Serialize, serde::Deserialize))]
pub struct Count {
    /// The hash of the object to write
    pub id: ObjectId,
    /// A way to locate a pack entry in the object database, only available if the object is in a pack.
    pub entry_pack_location: Option<crate::bundle::Location>,
}

impl Count {
    /// Create a new instance from the given `oid` and its corresponding git `obj`ect data.
    pub fn from_data(oid: impl Into<ObjectId>, obj: &data::Object<'_>) -> Self {
        Count {
            id: oid.into(),
            entry_pack_location: obj.pack_location.clone(),
        }
    }
}

///
pub mod iter_from_objects;
pub use iter_from_objects::iter_from_objects;