Retrieve a Ledger in Amatino Swift - A double-entry accounting library for iOS & MacOS

retrieveLedger.swift

// Amatino Swift: https://github.com/amatino-code/amatino-swift
// Double entry accounting API

try Ledger.retrieve(
    session: session,
    entity: starkIndustries,
    account: cashAccount,
    callback: { (error: Error?, balance: Balance?) in
        guard error == nil else {
            // Handle error, e.g. 404 account not found, 403
            // you are not authorised to view the account
        }
        guard let cashLedger: Ledger = ledger else {
            // Should never happen, but practicing safe nil
            // unwrapping is good feng shui
        }
        // Do cool stuff with cashLedger. For example, we can
        // iterate over all the LedgerRows it contains:
        for line in cashLedger {
            print('Running balance: (\line.balance)')
        }
        // Ledgers are paginated in batches of 500 rows. To
        // get the next 500 rows, we call .nextPage():
        try! cashLedger.nextPage() { (error, rows) in
            guard let newRows: [LedgerRow] = rows else {
                // Handle errors
            }
            for line in newRows {
                print('Running balance: (\line.balance)')
            }
        }
        // The newly retrieved rows are now available in
        // the original `cashLedger` as well.
})

The parameters passed to Ledger.retrieve() may be found in the following gists:

• session - Create Session
• starkIndustries - Retrieve Entity
• cashAccount is an example of an Account created using the technique exemplified in Create Account.