Function persist_links

backend/src/bin/export.rs:493–522

(
    mutation: &mut Mutation,
    repo_link_repo_id: RepoId,
    repo_link_meta: &LinkMetadataRow,
    parent_topics: &Vec<ParentTopicRow>,
)

}

fn persist_links(
    mutation: &mut Mutation,
    repo_link_repo_id: RepoId,
    repo_link_meta: &LinkMetadataRow,
    parent_topics: &Vec<ParentTopicRow>,
) -> Result<()> {
    let repo_link = RepoLink {
        api_version: API_VERSION.to_string(),
        metadata: RepoLinkMetadata::try_from(repo_link_meta).unwrap(),
        parent_topics: BTreeSet::new(),
    };

    let mut repo_links = RepoLinks::new(repo_link_repo_id, repo_link);

    for parent in parent_topics {
        let parent_repo_id = RepoId::try_from(&parent.repository_id).unwrap();
        let repo_id = prefer_private_repo(repo_link_repo_id, parent_repo_id);
        let reference = repo_links.get_mut(repo_id);
        reference.parent_topics.insert(parent.try_into().unwrap());
    }

    let repo_ids = repo_links.links.keys().cloned().collect::<Vec<RepoId>>();

    for repo_id in repo_ids {
        let link = repo_links.get_mut(repo_id);
        persist_link(mutation, repo_id, link, parent_topics).unwrap();
    }

    Ok(())
}

async fn export_links(mutation: &mut Mutation, pool: &PgPool) -> Result<()> {
    log::info!("saving link blobs");