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Improve Location validation and error handling#248

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llucax:err-location
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Improve Location validation and error handling#248
llucax wants to merge 5 commits into
frequenz-floss:v0.x.xfrom
llucax:err-location

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@llucax llucax commented Jul 9, 2026

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Make latitude and longitude required to match the protobuf definition while keeping country_code optional even when it is required because in practice it could be missing (encoded as "").

We now also allow storing invalid values, but encoded via new types: InvalidLatitude, InvalidLongitude, and InvalidCountryCode. This way users still can't read invalid values accidentally. This allows users to inspect invalid values if they need to, instead of only reporting via logging.

Add new safe accesors for Location attributes and Microgrid.location to allow users to safely access the values without having to check for validity themselves.

Part of #239.

@llucax llucax added the cmd:skip-release-notes It is not necessary to update release notes for this PR label Jul 9, 2026
@github-actions github-actions Bot added part:docs Affects the documentation part:tests Affects the unit, integration and performance (benchmarks) tests part:grid Affects the grid protobuf definitions part:metrics Affects the metrics protobuf definitions part:microgrid Affects the microgrid protobuf definitions labels Jul 9, 2026
@llucax llucax self-assigned this Jul 9, 2026
@llucax llucax added this to the v0.4.1 milestone Jul 9, 2026
@llucax llucax force-pushed the err-location branch 3 times, most recently from 27f666a to 7a7ac21 Compare July 10, 2026 13:45
llucax added 5 commits July 13, 2026 10:20
Add three new subclasses of `InvalidAttributeError`:

* `InvalidLatitudeError` — the raw `float` was outside `[-90, 90]`
* `InvalidLongitudeError` — the raw `float` was outside `[-180, 180]`
* `InvalidCountryCodeError` — the raw `str` was not exactly 2 characters

Each stores the offending value on `.value` (`float` for the coordinate
errors, `str` for the country code error).

These will be raised by the upcoming `Location.get_latitude()`,
`.get_longitude()` and `.get_country_code()` accessors (next commits),
where the low-level fields on `Location` may carry the raw invalid data
that came off the wire.

Also split `test_location.py` into multiple files as it will grow.

Signed-off-by: Leandro Lucarella <luca-frequenz@llucax.com>
These classes will be used to store invalid location attributes
explicitly, so they can still be inspected, but can't be used
accidentally.

Signed-off-by: Leandro Lucarella <luca-frequenz@llucax.com>
Use the new invalid types for typing `Location` attributes, so invalid
values are only accepted while using the wrapper type.

This avoids accidental usage of invalid values, and accidental
construction of invalid locations, while still allowing for inspection
and construction when invalid values are explicitly requested.

Signed-off-by: Leandro Lucarella <luca-frequenz@llucax.com>
Add `get_latitude()`, `get_longitude()`, `get_country_code()` and
`get_country_code_or_none()`. These accessors raise on invalid (or
sometimes missing) data.

Signed-off-by: Leandro Lucarella <luca-frequenz@llucax.com>
Add `Microgrid.get_location() -> Location`, the safe counterpart of the
`Microgrid.location` field. It resolves the optional underlying field to
a concrete `Location`:

* `None` (the field was not set on the wire) → `MissingFieldError`.
* `Location` → returned unchanged.

Callers that need validated coordinates or a validated country code
should chain through the new
`Location.get_{latitude,longitude,country_code}()` accessors on the
returned instance.

Also generalize the file-local `_make_microgrid` test helper to accept
both `delivery_area` and `location` as keyword-only arguments (both
default to `None`), and update the existing `get_delivery_area()` tests
to pass `delivery_area` by keyword — no behavior change, just the same
helper covering both accessor test suites.

Signed-off-by: Leandro Lucarella <luca-frequenz@llucax.com>
@llucax llucax marked this pull request as ready for review July 13, 2026 08:21
@llucax llucax requested a review from a team as a code owner July 13, 2026 08:21
@llucax llucax requested review from ela-kotulska-frequenz and removed request for a team July 13, 2026 08:21
@llucax llucax enabled auto-merge July 13, 2026 08:21
@llucax llucax disabled auto-merge July 13, 2026 08:23
@llucax llucax enabled auto-merge July 13, 2026 10:55
@llucax llucax requested review from Marenz and cwasicki July 13, 2026 10:55
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cmd:skip-release-notes It is not necessary to update release notes for this PR part:docs Affects the documentation part:grid Affects the grid protobuf definitions part:metrics Affects the metrics protobuf definitions part:microgrid Affects the microgrid protobuf definitions part:tests Affects the unit, integration and performance (benchmarks) tests

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