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|
require 'forwardable'
require 'singleton'
class PackageRepository < BaseRepository
include Singleton
class << self
extend Forwardable
def_delegators :instance, :suggest, :resolve, :find_atoms_by_useflag, :default_search_size, :default_search,
:build_query, :match_wildcard, :match_phrase, :match_description, :match_category, :scoring_functions
end
index_name "packages-#{Rails.env}"
klass Package
mapping do
indexes :category, type: 'keyword'
indexes :name, type: 'keyword'
indexes :name_sort, type: 'keyword'
indexes :atom, type: 'keyword'
indexes :description, type: 'text'
indexes :longdescription, type: 'text'
indexes :homepage, type: 'keyword'
indexes :license, type: 'keyword'
indexes :licenses, type: 'keyword'
indexes :herds, type: 'keyword'
indexes :maintainers, type: 'object'
indexes :useflags, type: 'object'
indexes :metadata_hash, type: 'keyword'
indexes :created_at, type: 'date'
indexes :updated_at, type: 'date'
end
def suggest(q)
PackageRepository.search(
size: 20,
query: {
wildcard: {
name_sort: {
wildcard: q.downcase + '*'
}
}
}
)
end
# Tries to resolve a query atom to one or more packages
def resolve(atom)
[] if atom.nil? || atom.empty?
PackageRepository.find_all_by(:atom, atom) + PackageRepository.find_all_by(:name, atom)
end
# Searches the versions index for versions using a certain USE flag.
# Results are aggregated by package atoms.
def find_atoms_by_useflag(useflag)
VersionRepository.search(
size: 0, # collect all packages.
query: {
bool: {
must: { match_all: {} },
filter: { term: { use: useflag } }
}
},
aggs: {
group_by_package: {
terms: {
field: 'package',
order: { '_key' => 'asc' },
# https://www.elastic.co/guide/en/elasticsearch/reference/current/search-aggregations-bucket-terms-aggregation.html
# ES actually dislikes large sizes like this (it defines 10k buckets basically) and it will be *very* expensive but lets try it and see.
# Other limits in this app are also 10k mostly to 'make things fit kinda'.
size: 10000,
}
}
},
).response.aggregations['group_by_package'].buckets
end
def default_search_size
25
end
def default_search(q, offset)
return [] if q.nil? || q.empty?
part1, part2 = q.split('/', 2)
if part2.nil?
search(build_query(part1, nil, default_search_size, offset))
else
search(build_query(part2, part1, default_search_size, offset))
end
end
def build_query(q, category, size, offset)
{
size: size,
from: offset,
query: {
function_score: {
query: { bool: bool_query_parts(q, category) },
functions: scoring_functions
}
}
}
end
def bool_query_parts(q, category = nil)
q_dwncsd = q.downcase
query = {
must: [
match_wildcard(q_dwncsd)
],
should: [
match_phrase(q_dwncsd),
match_description(q)
]
}
query[:must] << [match_category(category)] if category
query
end
def match_wildcard(q)
q = ('*' + q + '*') unless q.include? '*'
q.tr!(' ', '*')
{
wildcard: {
name_sort: {
wildcard: q,
boost: 4
}
}
}
end
def match_phrase(q)
{
match_phrase: {
name: {
query: q,
boost: 5
}
}
}
end
def match_description(q)
{
match: {
description: {
query: q,
boost: 0.1
}
}
}
end
def match_category(cat)
{
match: {
category: {
query: cat,
boost: 2
}
}
}
end
def scoring_functions
[
{
filter: {
term: {
category: 'virtual'
}
},
weight: 0.6
}
]
end
end
|
GitWeb