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Diffstat (limited to 'src/document/mod.rs')
| -rw-r--r-- | src/document/mod.rs | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/document/mod.rs b/src/document/mod.rs index c183537..a546d63 100644 --- a/src/document/mod.rs +++ b/src/document/mod.rs @@ -13,6 +13,16 @@ pub(crate) use automerge::{ ScalarValue, }; +/// How many writers (actors) `doc`'s changes have: from the changes' metadata, in +/// time proportional to the document. +pub(crate) fn writers(doc: &Document) -> usize { + doc.get_changes_meta(&[]) + .into_iter() + .map(|meta| meta.actor.into_owned()) + .collect::<std::collections::HashSet<_>>() + .len() +} + /// The whole document as bytes, as the engine saves it: a backup, the document /// file's full save, the size a joining node downloads. pub(crate) fn save(doc: &Document) -> Vec<u8> { |