68 行
2.2 KiB
Crystal
68 行
2.2 KiB
Crystal
# Extracts text from InnerTube response
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#
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# InnerTube can package text in three different formats
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# "runs": [
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# {"text": "something"},
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# {"text": "cont"},
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# ...
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# ]
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#
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# "SimpleText": "something"
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#
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# Or sometimes just none at all as with the data returned from
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# category continuations.
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#
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# In order to facilitate calling this function with `#[]?`:
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# A nil will be accepted. Of course, since nil cannot be parsed,
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# another nil will be returned.
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def extract_text(item : JSON::Any?) : String?
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if item.nil?
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return nil
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end
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if text_container = item["simpleText"]?
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return text_container.as_s
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elsif text_container = item["runs"]?
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return text_container.as_a.map(&.["text"].as_s).join("")
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else
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nil
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end
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end
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def extract_videos(initial_data : Hash(String, JSON::Any), author_fallback : String? = nil, author_id_fallback : String? = nil)
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extracted = extract_items(initial_data, author_fallback, author_id_fallback)
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target = [] of SearchItem
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extracted.each do |i|
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if i.is_a?(Category)
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i.contents.each { |cate_i| target << cate_i if !cate_i.is_a? Video }
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else
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target << i
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end
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end
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return target.select(&.is_a?(SearchVideo)).map(&.as(SearchVideo))
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end
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def extract_selected_tab(tabs)
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# Extract the selected tab from the array of tabs Youtube returns
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return selected_target = tabs.as_a.select(&.["tabRenderer"]?.try &.["selected"].as_bool)[0]["tabRenderer"]
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end
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def fetch_continuation_token(items : Array(JSON::Any))
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# Fetches the continuation token from an array of items
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return items.last["continuationItemRenderer"]?
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.try &.["continuationEndpoint"]["continuationCommand"]["token"].as_s
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end
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def fetch_continuation_token(initial_data : Hash(String, JSON::Any))
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# Fetches the continuation token from initial data
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if initial_data["onResponseReceivedActions"]?
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continuation_items = initial_data["onResponseReceivedActions"][0]["appendContinuationItemsAction"]["continuationItems"]
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else
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tab = extract_selected_tab(initial_data["contents"]["twoColumnBrowseResultsRenderer"]["tabs"])
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continuation_items = tab["content"]["sectionListRenderer"]["contents"][0]["itemSectionRenderer"]["contents"][0]["gridRenderer"]["items"]
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end
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return fetch_continuation_token(continuation_items.as_a)
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end
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