aven-core 0.1.33

Core library for the Aven local-first task manager
Documentation 
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//! Stable error codes carried by client errors.
//!
//! Every engine error message starts `error <code>`, optionally followed by
//! details and a `hint="..."`. Hosts map codes, never message text.
use anyhow::Error;

/// The stable error codes in the chain, outermost first.
pub fn codes(error: &Error) -> impl Iterator<Item = String> + '_ {
    error.chain().filter_map(|cause| {
        cause
            .to_string()
            .strip_prefix("error ")
            .and_then(|rest| rest.split_whitespace().next())
            .map(str::to_string)
    })
}

/// The outermost stable error code in the chain.
pub fn code(error: &Error) -> Option<String> {
    codes(error).next()
}

pub fn has_code(error: &Error, expected: &str) -> bool {
    codes(error).any(|code| code == expected)
}

/// The server saw an older membership head than its current one.
pub fn is_stale(error: &Error) -> bool {
    error.is::<crate::sync::seed_claim::membership::StaleContext>()
}

/// The server refused this device's credential or membership, which may
/// mean another device removed it.
pub fn is_access_refusal(error: &Error) -> bool {
    has_code(error, "sync-server-refused")
        || has_code(error, "enrollment-unauthorized")
        || has_code(error, "enrollment-revoked")
        || has_code(error, "sync-device-removed")
}