rm-hull / fuel-prices-api / 22687110884

Pull #22

github

feat: add support for incremental data fetching

Introduces a `--full-refresh` CLI flag and logic to fetch only data
updated since the last successful request using the
`effective-start-timestamp` query parameter.

*   Adds `fullRefresh` toggle to `fuelPricesManager`.
*   Updates `ApiServer` and `bootstrap` to propagate the new setting.
*   Forces full refresh for the `import` command.
*   Conditionally includes `effective-start-timestamp` in API calls.

```mermaid
sequenceDiagram
    participant CLI as CLI (main.go)
    participant Cmd as API/Import Command
    participant Client as FuelPricesClient
    participant Gov as GOV.UK API

    CLI->>Cmd: Execute with fullRefresh flag
    Cmd->>Client: NewFuelPricesClient(..., fullRefresh)
    Client->>Client: getEffectiveStartTimestamp()
    alt !fullRefresh AND lastFetch exists
        Client->>Gov: GET /path?effective-start-timestamp=...
    else
        Client->>Gov: GET /path
    end
```

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