38 lines
828 B
Ruby
38 lines
828 B
Ruby
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# frozen_string_literal: true
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module PostsHelper
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include ApplicationHelper
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CACHE_URL_DURATION = 12.hours.to_i
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def self.clear_canonical_cache!(post)
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key = canonical_redis_key(post)
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Discourse.redis.del(key)
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end
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def self.canonical_redis_key(post)
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"post_canonical_url_#{post.id}"
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end
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def cached_post_url(post, use_canonical:)
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if use_canonical
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# this is very expensive to calculate page, we cache it for 12 hours
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key = PostsHelper.canonical_redis_key(post)
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url = Discourse.redis.get(key)
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# break cache if either slug or topic_id changes
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url = nil if url && !url.start_with?(post.topic.url)
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if !url
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url = post.canonical_url
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Discourse.redis.setex(key, CACHE_URL_DURATION, url)
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end
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url
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else
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post.full_url
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end
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end
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end
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