58 lines
1.6 KiB
Ruby
58 lines
1.6 KiB
Ruby
# frozen_string_literal: true
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# A simple finding for obtaining a single User.
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#
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# While using `User.find_by` directly is straightforward, it can lead to a lot
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# of code duplication. Sometimes we just want to find a user by an ID, other
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# times we may want to exclude blocked user. By using this finder (and extending
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# it whenever necessary) we can keep this logic in one place.
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class UserFinder
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def initialize(username_or_id)
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@username_or_id = username_or_id
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end
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# Tries to find a User by id, returning nil if none could be found.
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def find_by_id
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User.find_by_id(@username_or_id)
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end
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# Tries to find a User by id, raising a `ActiveRecord::RecordNotFound` if it could
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# not be found.
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def find_by_id!
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User.find(@username_or_id)
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end
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# Tries to find a User by username, returning nil if none could be found.
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def find_by_username
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User.find_by_username(@username_or_id)
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end
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# Tries to find a User by username, raising a `ActiveRecord::RecordNotFound` if it could
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# not be found.
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def find_by_username!
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User.find_by_username!(@username_or_id)
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end
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# Tries to find a User by username or id, returning nil if none could be found.
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def find_by_id_or_username
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if input_is_id?
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find_by_id
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else
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find_by_username
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end
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end
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# Tries to find a User by username or id, raising a `ActiveRecord::RecordNotFound` if it could
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# not be found.
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def find_by_id_or_username!
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if input_is_id?
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find_by_id!
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else
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find_by_username!
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end
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end
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def input_is_id?
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@username_or_id.is_a?(Numeric) || @username_or_id =~ /^\d+$/
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end
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end
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