jared
f7035049e7
Minimal skeleton for uscogdata v0.1. Internal session layer with lazy cog_open(), manifest fetch+validate+cache, view registration placeholder. Depends on DuckDB >=1.0, httr2, jsonlite. inst/schemas/provenance-v1.json ships the structured provenance JSON Schema.
41 lines
1.3 KiB
R
41 lines
1.3 KiB
R
# R/manifest.R
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#' Fetch manifest.json from URL, cache locally, validate TTL.
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#' @noRd
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.fetch_or_cache_manifest <- function(url, cache_dir) {
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cache_path <- file.path(cache_dir, "manifest.json")
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ttl <- as.integer(.cfg("manifest_ttl_secs"))
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needs_fetch <- !file.exists(cache_path) ||
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difftime(Sys.time(), file.info(cache_path)$mtime, units = "secs") > ttl
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if (needs_fetch) {
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resp <- httr2::request(paste0(url, "manifest.json")) |>
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httr2::req_error(is_error = function(r) httr2::resp_status(r) >= 400) |>
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httr2::req_perform()
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writeLines(httr2::resp_body_string(resp), cache_path)
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}
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jsonlite::fromJSON(cache_path, simplifyVector = FALSE)
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}
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#' @noRd
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.validate_schema <- function(manifest, expected_version) {
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if (manifest$schema_version != expected_version) {
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cli::cli_abort(c(
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"Corpus schema version mismatch.",
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x = "Package expects schema_version = {expected_version}; corpus has {manifest$schema_version}.",
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i = "Update uscogdata (install.packages or pak::pkg_install) or re-publish corpus."
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))
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}
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}
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#' @noRd
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.validate_scope <- function(manifest) {
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included <- manifest$scope$gov_types_included
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.uscogdata_env$scope_included <- included
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invisible(NULL)
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}
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`%||%` <- function(a, b) if (is.null(a) || (length(a) == 1 && is.na(a))) b else a
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