mirror of
https://github.com/discourse/discourse.git
synced 2024-12-16 18:23:46 +08:00
138 lines
3.8 KiB
Ruby
138 lines
3.8 KiB
Ruby
class ScoreCalculator
|
|
|
|
def self.default_score_weights
|
|
{
|
|
reply_count: 5,
|
|
like_score: 15,
|
|
incoming_link_count: 5,
|
|
bookmark_count: 2,
|
|
avg_time: 0.05,
|
|
reads: 0.2
|
|
}
|
|
end
|
|
|
|
def initialize(weightings=nil)
|
|
@weightings = weightings || ScoreCalculator.default_score_weights
|
|
end
|
|
|
|
# Calculate the score for all posts based on the weightings
|
|
def calculate(min_topic_age=nil)
|
|
|
|
update_posts_score(min_topic_age)
|
|
|
|
update_posts_rank(min_topic_age)
|
|
|
|
update_topics_rank(min_topic_age)
|
|
|
|
update_topics_percent_rank(min_topic_age)
|
|
|
|
end
|
|
|
|
|
|
private
|
|
|
|
def update_posts_score(min_topic_age)
|
|
components = []
|
|
@weightings.each_key { |k| components << "COALESCE(#{k}, 0) * :#{k}" }
|
|
components = components.join(" + ")
|
|
|
|
builder = SqlBuilder.new(
|
|
"UPDATE posts SET score = x.score
|
|
FROM (SELECT id, #{components} as score FROM posts) AS x
|
|
/*where*/"
|
|
|
|
)
|
|
|
|
builder.where("x.id = posts.id
|
|
AND (posts.score IS NULL OR x.score <> posts.score)", @weightings)
|
|
|
|
filter_topics(builder, min_topic_age)
|
|
|
|
builder.exec
|
|
end
|
|
|
|
def update_posts_rank(min_topic_age)
|
|
|
|
builder = SqlBuilder.new("UPDATE posts SET percent_rank = x.percent_rank
|
|
FROM (SELECT id, percent_rank()
|
|
OVER (PARTITION BY topic_id ORDER BY SCORE DESC) as percent_rank
|
|
FROM posts) AS x
|
|
/*where*/")
|
|
|
|
builder.where("x.id = posts.id AND
|
|
(posts.percent_rank IS NULL OR x.percent_rank <> posts.percent_rank)")
|
|
|
|
|
|
filter_topics(builder, min_topic_age)
|
|
|
|
builder.exec
|
|
end
|
|
|
|
def update_topics_rank(min_topic_age)
|
|
builder = SqlBuilder.new("UPDATE topics AS t
|
|
SET has_summary = (t.like_count >= :likes_required AND
|
|
t.posts_count >= :posts_required AND
|
|
x.max_score >= :score_required),
|
|
score = x.avg_score
|
|
FROM (SELECT p.topic_id,
|
|
MAX(p.score) AS max_score,
|
|
AVG(p.score) AS avg_score
|
|
FROM posts AS p
|
|
GROUP BY p.topic_id) AS x
|
|
/*where*/")
|
|
|
|
builder.where("x.topic_id = t.id AND
|
|
(
|
|
(t.score <> x.avg_score OR t.score IS NULL) OR
|
|
(t.has_summary IS NULL OR t.has_summary <> (
|
|
t.like_count >= :likes_required AND
|
|
t.posts_count >= :posts_required AND
|
|
x.max_score >= :score_required
|
|
))
|
|
)
|
|
",
|
|
likes_required: SiteSetting.summary_likes_required,
|
|
posts_required: SiteSetting.summary_posts_required,
|
|
score_required: SiteSetting.summary_score_threshold)
|
|
|
|
if min_topic_age
|
|
builder.where("t.bumped_at > :bumped_at ",
|
|
bumped_at: min_topic_age)
|
|
end
|
|
|
|
builder.exec
|
|
end
|
|
|
|
def update_topics_percent_rank(min_topic_age)
|
|
|
|
builder = SqlBuilder.new("UPDATE topics SET percent_rank = x.percent_rank
|
|
FROM (SELECT id, percent_rank()
|
|
OVER (ORDER BY SCORE DESC) as percent_rank
|
|
FROM topics) AS x
|
|
/*where*/")
|
|
|
|
builder.where("x.id = topics.id AND (topics.percent_rank <> x.percent_rank OR topics.percent_rank IS NULL)")
|
|
|
|
|
|
if min_topic_age
|
|
builder.where("topics.bumped_at > :bumped_at ",
|
|
bumped_at: min_topic_age)
|
|
end
|
|
|
|
|
|
builder.exec
|
|
end
|
|
|
|
|
|
def filter_topics(builder, min_topic_age)
|
|
if min_topic_age
|
|
builder.where('posts.topic_id IN
|
|
(SELECT id FROM topics WHERE bumped_at > :bumped_at)',
|
|
bumped_at: min_topic_age)
|
|
end
|
|
|
|
builder
|
|
end
|
|
|
|
end
|