Method get_view_info

atomic-repository/src/repository/views.rs:503–543

Get information about a view. Returns the view's metadata including its Merkle state and change count. # Arguments `name` - The name of the view to query # Returns A `ViewInfo` struct with the view's metadata, or an error if the view doesn't exist.

(&self, name: &str)

    /// A `ViewInfo` struct with the view's metadata, or an error if the view
    /// doesn't exist.
    pub fn get_view_info(&self, name: &str) -> Result<ViewInfo, RepositoryError> {
        let txn = self
            .pristine
            .read_txn()
            .map_err(|e| RepositoryError::Database(e.to_string()))?;

        let view = txn
            .get_view(name)
            .map_err(|e| RepositoryError::Database(e.to_string()))?
            .ok_or_else(|| RepositoryError::ViewNotFound {
                name: name.to_string(),
            })?;

        // Resolve parent name and compute own change count.
        let (parent_name, parent_change_count) = if let Some(parent_id) = view.parent {
            match txn
                .get_view_by_id(parent_id)
                .map_err(|e| RepositoryError::Database(e.to_string()))?
            {
                Some(p) => (Some(p.name), p.change_count),
                None => (None, 0),
            }
        } else {
            (None, 0)
        };

        let own_change_count = if view.parent.is_some() {
            view.change_count.saturating_sub(parent_change_count)
        } else {
            view.change_count
        };

        Ok(ViewInfo {
            name: view.name.clone(),
            state: view.state,
            change_count: view.change_count,
            own_change_count,
            scope: view.kind,
            parent_name,
        })
    }
}