transferegovr 0.1.0

First release.

• Covers the three TransfereGov open data APIs — special transfers (transferenciasespeciais), fund-to-fund transfers (fundoafundo) and decentralized credit (ted) — and the forty-eight tables they publish.
• tg_get() and tg_count() query any table; tg_ted(), tg_fundo_a_fundo() and tg_transferencias_especiais() fix the module.
• Filters are named after the columns they apply to. A bare value means “equals”, a bare vector means “is one of”, and tg_operators() lists the fifteen comparison operators the services accept. Operators are evaluated in their own mask, so they work regardless of what the user has attached.
• Values carrying commas, parentheses or surrounding spaces are quoted, and numbers are never sent in scientific notation, so a filter matches what it reads as.
• tg_modules(), tg_tables() and tg_fields() describe the APIs offline, from a copy of their OpenAPI documents frozen into the package and rebuilt by data-raw/schema.R.
• Columns are typed from that schema rather than inferred, so a column that is entirely null on one page keeps its class on the next, and an empty result still carries the table’s full set of columns. bigint columns are returned as double, because a value beyond .Machine$integer.max would become NA as an integer.
• Pagination collects as many rows as .limit asks for, in pages of at most 1000 — the service’s own cap, which it applies silently. Every request carries an explicit order, so pages cannot overlap or skip rows, and the number collected is checked against the total the API reports.
• tg_metadata() records the total the API reported, the rows and pages retrieved, the order and selection used, and whether the result was cached.
• Requests are throttled to sixty a minute and retried with exponential backoff on 429 and 5xx responses. A 400 is not retried, and its ‘PostgREST’ error body is surfaced with the offending column named.
• Responses are cached for an hour, by default in the session’s temporary directory. tg_cache_dir() switches to a persistent location and tg_cache_clear() empties it.
• tg_tables(counts = TRUE) reports how many rows each table currently holds, so sizing every table is one call rather than a loop over tg_count(). It is the only part of that function that needs a network connection.
• A request whose URL grows past what the service accepts fails with a message naming the cause — a filter built with in_() over a long vector. curl otherwise reports “Error in the HTTP2 framing layer”, which says nothing about the query.
• English is canonical throughout, with Portuguese aliases for the exported verbs. Table names, column names and categorical values stay in Portuguese because they are the APIs’ own contract.