tap-kaloricketabulky

A Singer tap (Meltano SDK) for extracting a user's own data from kaloricketabulky.cz. Built on the kaloricketabulky-sdk.

The site has no official public API. This tap uses the same unofficial endpoints the web app uses. Use it for your own data only, be a respectful guest: keep request_delay_seconds at 0.5 s or higher and don't hammer the site. If you get value from kaloricketabulky.cz, consider supporting them with a subscription.

Requirements

• Python >= 3.12
• uv

Configuration

Settings can be supplied via a config.json file or as environment variables prefixed TAP_KALORICKETABULKY_ (the standard Meltano/Singer SDK convention).

Streams

Per-day — INCREMENTAL (replication key: date)

Snapshots — FULL_TABLE

Records are emitted faithfully and with nested structure matching the SDK models. To flatten nested fields into columns, enable the SDK's built-in flattener via flattening_enabled: true and flattening_max_depth: <n> in your config.

Incremental and lookback behaviour

Per-day streams resume from Singer state. On each run, the tap re-pulls the last lookback_days days before the stored bookmark so that late diary entries (people often log calories a day or two after the fact) are captured without a full backfill.

Snapshot streams are FULL_TABLE: each run pulls the complete [start_date, today] series in a single request per metric, so late edits to past days are always reflected. Dedup downstream by measurement day if needed.

Lowering start_date after the first run requires resetting Singer state to backfill the newly included range (standard Singer behaviour).

Usage

CLI

uv run tap-kaloricketabulky --about --format=json
uv run tap-kaloricketabulky --config config.json --discover > catalog.json
uv run tap-kaloricketabulky --config config.json --catalog catalog.json

Meltano

plugins:
  extractors:
  - name: tap-kaloricketabulky
    namespace: tap_kaloricketabulky
    pip_url: git+https://github.com/tomasvotava/tap-kaloricketabulky.git
    capabilities:
    - state
    - catalog
    - discover
    - about
    - stream-maps
    settings:
    - name: email
      kind: string
      sensitive: true
      label: Email
    - name: password
      kind: string
      sensitive: true
      label: Password
    - name: start_date
      kind: date_iso8601
      label: Start Date
    settings_group_validation:
    - [email, password, start_date]
    config:
      start_date: "2025-01-01T00:00:00Z"
      request_delay_seconds: 0.5

Development

uv sync                                    # create the environment from the lockfile
uv run ruff format --check .               # check formatting
uv run ruff check .                        # lint
uv run mypy tap_kaloricketabulky tests     # strict type-check
uv run pytest                              # run tests with coverage
uv run python scripts/gen_schemas.py       # regenerate schemas from SDK models

Never hand-edit the JSON files under tap_kaloricketabulky/schemas/; they are generated from the SDK's Pydantic models. A drift test (tests/test_schemas.py) fails the suite if the committed schemas fall out of sync with the models.

Releases

Versioning and the changelog are driven by Commitizen. Do not edit CHANGELOG.md by hand:

uv run cz bump

License

MIT