81 lines
2.3 KiB
Ruby
81 lines
2.3 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module GithubImport
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# IssuableFinder can be used for caching and retrieving database IDs for
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# issuable objects such as issues and pull requests. By caching these IDs we
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# remove the need for running a lot of database queries when importing
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# GitHub projects.
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class IssuableFinder
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attr_reader :project, :object
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# The base cache key to use for storing/retrieving issuable IDs.
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CACHE_KEY = 'github-import/issuable-finder/%{project}/%{type}/%{iid}'
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# project - An instance of `Project`.
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# object - The object to look up or set a database ID for.
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def initialize(project, object)
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@project = project
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@object = object
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end
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# Returns the database ID for the object.
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#
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# This method will return `nil` if no ID could be found.
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def database_id
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val = Caching.read(cache_key)
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val.to_i if val.present?
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end
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# Associates the given database ID with the current object.
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#
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# database_id - The ID of the corresponding database row.
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def cache_database_id(database_id)
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Caching.write(cache_key, database_id)
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end
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private
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def cache_key
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CACHE_KEY % {
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project: project.id,
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type: cache_key_type,
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iid: cache_key_iid
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}
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end
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# Returns the identifier to use for cache keys.
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#
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# For issues and pull requests this will be "Issue" or "MergeRequest"
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# respectively. For diff notes this will return "MergeRequest", for
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# regular notes it will either return "Issue" or "MergeRequest" depending
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# on what type of object the note belongs to.
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def cache_key_type
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if object.respond_to?(:issuable_type)
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object.issuable_type
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elsif object.respond_to?(:noteable_type)
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object.noteable_type
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else
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raise(
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TypeError,
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"Instances of #{object.class} are not supported"
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)
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end
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end
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def cache_key_iid
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if object.respond_to?(:noteable_id)
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object.noteable_id
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elsif object.respond_to?(:iid)
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object.iid
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else
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raise(
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TypeError,
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"Instances of #{object.class} are not supported"
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)
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end
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end
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end
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end
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end
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