f05a12a880
Posts, like 8661f4724aa9, can go missing if the account or post was
removed. In this case, the API returns data like this:
```json
{
"data": {
"post": null
}
}
```
When this happens, we can detect it because the parsed response now has
a nil value: `response.data.post == nil` and construct an `EmptyPage`
instead of a `Page`. The `Articles::Show` action can then render
conditionally based on if the response from `PageConverter` is a `Page`
or an `EmptyPage`.
42 lines
1.3 KiB
Crystal
42 lines
1.3 KiB
Crystal
class PageConverter
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def convert(post : PostResponse::Post) : Page
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title, content = title_and_content(post)
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author = post.creator
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created_at = Time.unix_ms(post.createdAt)
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gist_store = gist_store(content)
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Page.new(
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title: title,
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author: author,
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created_at: Time.unix_ms(post.createdAt),
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nodes: ParagraphConverter.new.convert(content, gist_store)
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)
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end
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def convert(post : Nil) : MissingPage
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MissingPage.new
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end
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def title_and_content(post : PostResponse::Post) : {String, Array(PostResponse::Paragraph)}
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title = post.title
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paragraphs = post.content.bodyModel.paragraphs
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non_content_paragraphs = paragraphs.reject { |para| para.text == title }
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{title, non_content_paragraphs}
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end
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private def gist_store(paragraphs) : GistStore | RateLimitedGistStore
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store = GistStore.new
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gist_urls = GistScanner.new(paragraphs).scan
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gist_responses = gist_urls.map do |url|
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params = GistParams.extract_from_url(url)
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response = GithubClient.get_gist_response(params.id)
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if response.is_a?(GithubClient::RateLimitedResponse)
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return RateLimitedGistStore.new
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end
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JSON.parse(response.data.body)["files"].as_h.values.map do |json_any|
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store.store_gist_file(params.id, GistFile.from_json(json_any.to_json))
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end
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end
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store
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end
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end
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