97 lines
2.5 KiB
Go
97 lines
2.5 KiB
Go
package fetcher
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import (
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"context"
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"errors"
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"log/slog"
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"time"
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"git.avsdev.uk/Go/job-search/internal/config"
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"git.avsdev.uk/Go/job-search/internal/findatender"
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"git.avsdev.uk/Go/job-search/internal/types"
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"git.avsdev.uk/Go/job-search/internal/util"
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)
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// findATenderSource is the Source of the opportunities Find a Tender's
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// converter makes, and so of the ones the Find a Tender source fetches.
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const findATenderSource = "FindATender"
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// runFindATender polls Find a Tender every configured interval until ctx
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// is cancelled, passing what each run fetches to save, even when the run
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// fails partway. A long window is backfilled first (see backfill).
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func runFindATender(
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ctx context.Context,
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logger *slog.Logger,
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conf *config.JSCSourceFindATender,
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save saveFunc,
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since time.Time,
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) error {
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if conf.APIRoot == "" {
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return errors.New("fetcher: sources.find_a_tender.api_root is not set")
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}
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fetch := func(
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ctx context.Context, since, until time.Time,
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) ([]*types.Opportunity, error) {
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return fetchFindATender(ctx, logger, conf, since, until)
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}
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since = backfill(
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ctx,
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logger,
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findATenderSource,
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conf.Interval,
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fetch,
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save,
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since,
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)
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worker := util.Worker{
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Logger: tagged(logger),
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Name: findATenderSource,
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Interval: conf.Interval,
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Task: func(ctx context.Context, since time.Time) error {
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opportunities, err := fetch(ctx, since, time.Time{})
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return saveFetched(ctx, logger, save, opportunities, err)
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},
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}
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return worker.Run(ctx, since)
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}
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// fetchFindATender fetches everything updated from since up to until (zero:
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// no bound) from Find a Tender. If it fails partway, what it fetched before
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// the error is returned along with it. Finding nothing returns
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// ErrNoNewReleases, so the worker still moves its checkpoint on.
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func fetchFindATender(
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ctx context.Context,
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logger *slog.Logger,
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conf *config.JSCSourceFindATender,
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since, until time.Time,
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) ([]*types.Opportunity, error) {
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opportunities, err := util.AwaitTask(
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ctx,
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func() ([]*types.Opportunity, error) {
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findATender := findatender.New(
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conf.APIRoot, findatender.WithLogger(logger),
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)
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defer findATender.Shutdown()
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return findATender.With(ctx).FetchAll(findatender.RequestOptions{
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Since: since,
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Until: until,
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RateLimitRetries: conf.RateLimitRetries,
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})
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},
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)
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if errors.Is(err, findatender.ErrNoReleases) {
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return nil, ErrNoNewReleases
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}
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tagged(logger).Info(
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"fetched opportunities",
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"source", findATenderSource,
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"count", len(opportunities),
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)
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return opportunities, err
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}
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