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86 lines
2.5 KiB
86 lines
2.5 KiB
6 years ago
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class Users::SubjectService
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include CustomSortable
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sort_columns :updated_at, default_by: :updated_at, default_direction: :desc
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attr_reader :user, :params
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def initialize(user, params)
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@user = user
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@params = params
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end
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def call
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subjects = category_scope_subjects
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subjects = user_policy_filter(subjects)
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custom_sort(subjects, :updated_at, params[:sort_direction])
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end
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private
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def category_scope_subjects
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case params[:category]
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when 'study' then
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Subject.joins(stage_shixuns: { shixun: :myshixuns }).where(myshixuns: { user_id: user.id })
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when 'manage' then
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Subject.joins(:subject_members).where(subject_members: { user_id: user.id })
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else
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study_subject_ids = StageShixun.where(shixun_id: user.myshixuns.pluck(:shixun_id)).pluck(:subject_id)
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manage_subject_ids = user.subject_members.pluck(:subject_id)
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Subject.where(id: study_subject_ids + manage_subject_ids)
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end
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end
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def user_policy_filter(relations)
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# 只有自己或者管理员才有过滤筛选及查看全部状态下实训功能
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if self_or_admin?
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status_filter(relations)
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else
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relations.where(status: 2, hidden: false)
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end
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end
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def status_filter(relations)
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return relations unless self_or_admin?
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case params[:category]
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when 'study' then
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study_subject_status_filter(relations)
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when 'manage' then
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manage_subject_status_filter(relations)
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else
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relations
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end
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end
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def study_subject_status_filter(relations)
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subjects = Subject.joins(shixuns: :myshixuns)
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.where(myshixuns: { user_id: user.id })
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.select('subjects.id, (COUNT(IF(myshixuns.status=1, 1, 0)) = subjects.stages_count) finished')
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.group('subjects.id')
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subject_ids =
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case params[:status]
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when 'unfinished' then subjects.having('finished = 0').map(&:id)
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when 'finished' then subjects.having('finished = 1').map(&:id)
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end
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relations.where(id: subject_ids) if subject_ids.present?
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relations
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end
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def manage_subject_status_filter(relations)
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status = case params[:status]
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when 'editing' then 0
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when 'applying' then 1
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when 'published' then 2
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end
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relations.where(status: status) if status
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relations
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end
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def self_or_admin?
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User.current.id == user.id || User.current.admin?
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end
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end
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