Graham McIntire
bbe5bde145
Phoenix 1.8 app that scrapes ammunition retailers (Lucky Gunner, SGAmmo) for price data and displays historical price trends. - Data model: retailers, calibers, products, price snapshots - Scraper infrastructure with Req, Floki, realistic browser headers - Oban-scheduled scrape jobs (every 4h with randomized delays) - LiveView pages: homepage with category cards, caliber detail with price table, Chart.js price history, and price stats banner - 18 seeded calibers across handgun/rifle/rimfire/shotgun categories - 77 tests
36 lines
868 B
Elixir
36 lines
868 B
Elixir
defmodule Ammoprices.Scraping.ScrapeJob do
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@moduledoc false
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use Oban.Worker, queue: :scraping, max_attempts: 3
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alias Ammoprices.Catalog
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alias Ammoprices.Scraping.Runner
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@scrapers [
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Ammoprices.Scraping.Retailers.LuckyGunner,
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Ammoprices.Scraping.Retailers.SgAmmo
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]
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@impl Oban.Worker
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def perform(_job) do
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calibers = Catalog.list_calibers()
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for scraper <- @scrapers, caliber <- calibers do
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scrape_delay()
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Runner.run(scraper, caliber)
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end
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Phoenix.PubSub.broadcast(Ammoprices.PubSub, "prices:updated", {:prices_updated, %{}})
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:ok
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end
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# Random delay between requests: 5-15 seconds in prod, 0 in test
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defp scrape_delay do
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{min, max} = Application.get_env(:ammoprices, :scrape_delay_ms, {5_000, 15_000})
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delay = Enum.random(min..max)
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if delay > 0 do
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Process.sleep(delay)
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end
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end
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end
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