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feedkit/sources/doc.go

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// Package sources defines feedkit's input-source abstractions and source
// registry.
//
// External API surface:
// - Input: common source identity surface
// - PollSource: polling source interface
// - StreamSource: streaming source interface
// - Registry / NewRegistry: source driver registry and builders
// - HTTPSource / NewHTTPSource: reusable HTTP polling helper
//
// Source drivers are domain-specific and registered into Registry by driver name.
// Registry can then build configured sources from config.SourceConfig.
//
// A single source may emit 0..N events per poll or stream iteration, and those
// events may span multiple event kinds.
//
// Optional helpers from helpers.go:
// - DefaultEventID: default event ID policy for source implementations
// - SingleEvent: construct and validate a one-element event slice
// - ValidateExpectedKinds: compare configured expected kinds against source
// advertised kinds when metadata is available
//
// HTTP-backed polling sources can share NewHTTPSource for generic HTTP config
// parsing and conditional GET behavior. The helper understands:
// - params.url
// - params.user_agent
// - params.conditional (optional, default true)
//
// When validators are available, NewHTTPSource prefers ETag/If-None-Match and
// falls back to Last-Modified/If-Modified-Since. A 304 Not Modified response is
// treated as a successful unchanged poll.
package sources