Function asset_for_subject 

pub(crate) fn asset_for_subject(subject: &str, default_asset: u32) -> u32

Finds the asset number a message belongs to.

Legacy subjects carry the asset as their own token (<root>.<asset>.data.chNN), and the legacy wildcard receives every asset under the root, so the asset is read from the subject. Structured subjects (<root>.<site>.<box>.<source>.live.chNN) have no asset token, but the structured wildcard only receives one source, so the configured asset is used for them.

Arguments

• subject - Subject of a received message.
• default_asset - Asset number from ASSET_NUMBER.

Returns

The asset number from a legacy subject, or default_asset when the subject is not legacy or its asset token is not a number.

Examples

asset_for_subject("avenabox.1456.data.ch03", 1)               -> 1456
asset_for_subject("avenabox.007.data.ch03", 1)                -> 7
asset_for_subject("avenars.i69.i69-mu1.i69-lj2.live.ch11", 1) -> 1