Module: Labimotion::GenericHelpers

Extended by:
Grape::API::Helpers
Defined in:
lib/labimotion/helpers/generic_helpers.rb

Overview

Generic Helpers

Constant Summary collapse

STALE_TEMPLATE_MC =

Message code for "somebody else saved this template while you were editing it".

'sc09'
RESTORE_CONFLICT_MC =

Message code for "an active template already holds the identity you are restoring".

'sc10'
AUTHORIZATION_REFUSAL_MC =

Message code for "this template is maintained by somebody else" — the 403 a share-gated action answers with. Deliberately not the legacy 401: nobody here is unauthorised, they are asking about a colleague's template (template-sharing.md §3).

'sc11'
OWNER_ROW_MC =

Message code for "the owner row cannot be removed or downgraded — transfer instead".

'sc12'
ACCESS_ALREADY_HELD_MC =

Message code for "you already hold access to this template, so there is nothing to request". The 409 request_access answers a caller whose share row is already at viewer/editor/owner — a stale grid, not a mistake worth an error banner.

'sc13'
ACTION_PHRASE =

How a refusal names the action it refused, and which actions are owner-only for the wording. Kept as plain symbols here rather than reading ShareResolver::REQUIRED_LEVEL — the wording must not chain-load the ActiveRecord model in a process that only wanted the helpers. ShareResolver stays the enforcement authority.

{
  read: 'view', write: 'edit', release: 'release',
  deactivate: 'activate or deactivate', destroy: 'delete', manage: 'manage sharing for'
}.freeze
OWNER_ONLY_ACTIONS = 
%i[release deactivate destroy manage].freeze
KLASS_IDENTITY =

What makes a klass unique among the active rows. These are model validations only — there is no DB unique index behind any of them — and restore! writes through update_columns, so nothing re-checks them on the way back in.

{
  'ElementKlass' => %i[name],
  'SegmentKlass' => %i[label element_klass_id],
  'DatasetKlass' => %i[ols_term_id]
}.freeze
KLASS_IDENTITY_NOUN =

How the refusal names the identity that is taken.

{
  'ElementKlass' => 'name',
  'SegmentKlass' => 'label',
  'DatasetKlass' => 'ontology term'
}.freeze
RESTORE_RECOVERY_WINDOW =

Seconds, symmetric around the deleted template's own deleted_at, within which a soft-deleted child counts as "deleted together with it" (see Paranoia#restore!). Wide enough to cover a slow cascade over a template with many elements, narrow enough that rows binned on their own, on another day, stay binned.

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Instance Method Summary collapse

Instance Method Details

#ai_model_entry_id(entry) ⇒ Object 



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 168

def ai_model_entry_id(entry)
  return entry.to_s unless entry.is_a?(Hash)

  (entry[:id] || entry['id']).to_s
end

#ai_provider_overrides(profile, api_key) ⇒ Object

Personal provider endpoint (base_url/api_path) — honored only ALONGSIDE a personal key, so the shared server key is never sent to a user-supplied URL. The base_url itself is SSRF-validated later, in AiTemplate.



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 134

def ai_provider_overrides(profile, api_key)
  return {} if api_key.blank?

  {
    base_url: (profile.labimotion_ai_base_url if profile.respond_to?(:labimotion_ai_base_url)),
    api_path: (profile.labimotion_ai_api_path if profile.respond_to?(:labimotion_ai_api_path))
  }
end

#ai_server_model_allowlist ⇒ Object

Model ids the server permits on the SHARED key: the admin pick-list (:models) plus the server default (:model / KI_TOOLBOX_MODEL), read from the host config the same way Labimotion::AiTemplate does. Empty when the admin configured neither — the caller then skips the clamp (fail open), matching the gem's decoupled, non-blocking handling of overrides.



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 159

def ai_server_model_allowlist
  cfg = Rails.configuration.labimotion_ai || {}
  list = cfg[:models].is_a?(Array) ? cfg[:models] : []
  ids = list.map { |entry| ai_model_entry_id(entry) }
  (ids << cfg[:model].to_s << ENV['KI_TOOLBOX_MODEL'].to_s).reject(&:blank?).uniq
rescue StandardError
  []
end

#ai_shared_key_model(model) ⇒ Object

On the SHARED server key (user has no personal key), keep the user's model only if the admin allowed it; otherwise return nil so AiTemplate falls back to the server default. Returns the model unchanged when no allowlist is configured (fail open). Guards an off-list model being billed to the shared key.



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 147

def ai_shared_key_model(model)
  return model if model.blank?

  allow = ai_server_model_allowlist
  allow.any? && !allow.include?(model.to_s) ? nil : model
end

#ai_user_overrides(current_user) ⇒ Object

Per-user AI overrides (model + API key) resolved from the host app's user profile. Returns {} when the host doesn't expose them, so AiTemplate falls back to the server-wide yml/ENV configuration. Guarded with respond_to? to keep the gem decoupled from the host's Profile implementation. Shared by the dataset / element / segment AI helpers.



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 117

def ai_user_overrides(current_user)
  profile = current_user.respond_to?(:profile) ? current_user.profile : nil
  return {} if profile.nil?

  model   = (profile.labimotion_ai_model if profile.respond_to?(:labimotion_ai_model))
  api_key = (profile.labimotion_ai_api_key if profile.respond_to?(:labimotion_ai_api_key))
  model   = ai_shared_key_model(model) if api_key.blank?

  { model: model, api_key: api_key }.merge(ai_provider_overrides(profile, api_key)).compact
rescue StandardError => e
  Labimotion.log_exception(e, current_user)
  {}
end

#authenticate_admin!(type) ⇒ Object 



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 60

def authenticate_admin!(type)
  unauthorized = -> { error!('401 Unauthorized', 401) }
  if %w[standard_layers vocabularies].include?(type)
    unauthorized.call unless current_user.generic_admin.values_at(*Labimotion::Constants::Family::ALL).any?
  else
    unauthorized.call unless current_user.generic_admin[type]
  end
end

#authorization_refusal_msg(name, action) ⇒ Object 



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 92

def authorization_refusal_msg(name, action)
  requirement = if OWNER_ONLY_ACTIONS.include?(action)
                  "Only the owner can #{ACTION_PHRASE[action]} this template."
                elsif action == :read
                  "You need shared access to #{ACTION_PHRASE[action]} this template."
                else
                  "You need edit access to #{ACTION_PHRASE[action]} this template."
                end
  "This template is maintained by #{name}. #{requirement}"
end

#authorize_klass!(klz, action) ⇒ Object

The per-template gate (template-sharing.md §6). Takes the record, not a family string: resolution needs that klass's share rows and, for a SegmentKlass, its parent element's. Owner-less templates (and hosts that have not migrated) fall back to the legacy designer-wide gate — permanent behaviour, not a transition. A refusal is a 403 naming the owner, so the person refused knows who to ask, never the legacy bare 401.



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 80

def authorize_klass!(klz, action)
  result = Labimotion::ShareResolver.authorize(klz, current_user, action)
  return if result == :ok
  return authenticate_admin!(klass_family(klz)) if result == :legacy

  owner = Labimotion::OwnerResolver.find(result.owner_id)
  name = owner.respond_to?(:name) && owner.name.present? ? owner.name : 'another user'
  error!({ mc: AUTHORIZATION_REFUSAL_MC,
           msg: authorization_refusal_msg(name, action),
           owner: { id: result.owner_id, name: name == 'another user' ? nil : name } }, 403)
end

#conflicting_active_klass(name, keys, klz) ⇒ Object 



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 323

def conflicting_active_klass(name, keys, klz)
  return nil if keys.nil?

  identity = keys.to_h { |key| [key, klz.public_send(key)] }
  return nil if identity[keys.first].blank?

  # The default scope of a paranoid model excludes deleted rows, so this can only match an
  # active one — never the row being restored.
  "Labimotion::#{name}".constantize.where(identity).first
end

#create_attachments(files, del_files, type, id, identifier, user_id) ⇒ Object 



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 479

def create_attachments(files, del_files, type, id, identifier, user_id)
  attach_ary = []
  (files || []).each_with_index do |file, index|
    next unless (tempfile = file[:tempfile])

    att = Attachment.new(
      bucket: file[:container_id],
      filename: file[:filename],
      con_state: Labimotion::ConState::NONE,
      file_path: file[:tempfile],
      created_by: user_id,
      created_for: user_id,
      identifier: identifier[index],
      content_type: file[:type],
      attachable_type: type,
      attachable_id: id,
    )
    begin
      att.save!
      attach_ary.push(att.id)
    ensure
      tempfile.close
      tempfile.unlink
    end
  end
  unless (del_files || []).empty?
    Attachment.where('id IN (?) AND attachable_type = (?)', del_files.map!(&:to_i), type).update_all(attachable_id: nil)
  end
  attach_ary
rescue StandardError => e
  Labimotion.log_exception(e)
  raise e
end

#create_uploads(type, id, files, param_info, user_id) ⇒ Object 



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 426

def create_uploads(type, id, files, param_info, user_id)
  return if files.nil? || param_info.nil? || files.empty? || param_info.empty?

  attach_ary = []
  map_info = JSON.parse(param_info)
  map_info&.keys&.each do |key|
    next if map_info[key]['files'].empty?

    if type == Labimotion::Prop::SEGMENT
      element = Labimotion::Segment.find_by(element_id: id, segment_klass_id: key)
    elsif type == Labimotion::Prop::ELEMENT
      element = Labimotion::Element.find_by(id: id)
    end
    next if element.nil?

    uploads = fetch_properties_uploads(element.properties)

    map_info[key]['files'].each do |fobj|
      file = (files || []).select { |ff| ff['filename'] == fobj['uid'] }&.first
      pa = uploads.select { |ss| ss[:uid] == file[:filename] }&.first || nil
      next unless (tempfile = file[:tempfile])

      a = Attachment.new(
        bucket: file[:container_id],
        filename: fobj['filename'],
        con_state: Labimotion::ConState::NONE,
        file_path: file[:tempfile],
        created_by: user_id,
        created_for: user_id,
        content_type: file[:type],
        attachable_type: map_info[key]['type'],
        attachable_id: element.id,
      )
      begin
        a.save!

        update_properties_upload(element, element.properties, a, pa)
        attach_ary.push(a.id)
      ensure
        tempfile.close
        tempfile.unlink
      end
    end
    element.send("#{type.downcase}s_revisions")&.last&.destroy!
    element.save!
  end
  attach_ary
rescue StandardError => e
  Labimotion.log_exception(e, current_user)
  error!('Error while uploading files.', 500)
  raise e
end

#deactivate_klass(params) ⇒ Object 



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 174

def deactivate_klass(params)
  klz = fetch_klass(params[:klass], params[:id])
  authorize_klass!(klz, :deactivate)
  klz&.update!(is_active: params[:is_active])
  generate_klass_file unless klz.class.name != 'Labimotion::ElementKlass'
  klz
rescue StandardError => e
  Labimotion.log_exception(e, current_user)
  raise e
end

#delete_klass(params) ⇒ Object 



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 195

def delete_klass(params)
  klz = fetch_klass(params[:klass], params[:id])
  authorize_klass!(klz, :destroy)
  klz&.destroy!
  generate_klass_file unless klz.class.name != 'Labimotion::ElementKlass'
  status 201
rescue StandardError => e
  Labimotion.log_exception(e, current_user)
  raise e
end

#delete_klass_revision(params) ⇒ Object 



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 353

def delete_klass_revision(params)
  revision = "Labimotion::#{params[:klass]}esRevision".constantize.find(params[:id])
  klass = "Labimotion::#{params[:klass]}".constantize.find_by(id: params[:klass_id]) unless revision.nil?
  error!('Revision is invalid.', 404) if revision.nil?
  error!('Revision is invalid.', 404) unless revision_of_klass?(revision, klass, params[:klass])
  authorize_klass!(klass, :destroy)
  error!('Can not delete the active revision.', 405) if revision.uuid == klass.uuid
  revision.destroy!
rescue StandardError => e
  Labimotion.log_exception(e, current_user)
  raise e
end

#delete_revision(params) ⇒ Object 



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 366

def delete_revision(params)
  revision = "Labimotion::#{params[:klass]}sRevision".constantize.find(params[:id])
  element = "Labimotion::#{params[:klass]}".constantize.find_by(id: params[:element_id]) unless revision.nil?
  error!('Revision is invalid.', 404) if revision.nil?
  error!('Can not delete the active revision.', 405) if revision.uuid == element.uuid
  revision&.destroy!
rescue StandardError => e
  Labimotion.log_exception(e, current_user)
  raise e
end

#deleted_klasses(params) ⇒ Object

delete_klass soft-deletes (the klasses are acts_as_paranoid), but nothing could list or restore the result, so recovery meant direct database access.



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 277

def deleted_klasses(params)
  "Labimotion::#{params[:klass]}".constantize.only_deleted.order(deleted_at: :desc)
rescue StandardError => e
  Labimotion.log_exception(e, current_user)
  raise e
end

#fetch_deleted_klass(name, id) ⇒ Object 



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 302

def fetch_deleted_klass(name, id)
  klz = "Labimotion::#{name}".constantize.only_deleted.find_by(id: id)
  error!("#{name.gsub(/(Klass)/, '')} is not in the deleted list. Please refresh.", 404) if klz.nil?
  klz
end

#fetch_klass(name, id) ⇒ Object 



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 103

def fetch_klass(name, id)
  klz = "Labimotion::#{name}".constantize.find_by(id: id)
  error!("#{name.gsub(/(Klass)/, '')} is invalid. Please re-select.", 500) if klz.nil?
  klz
rescue StandardError => e
  Labimotion.log_exception(e, current_user)
  raise e
end

#fetch_properties_uploads(properties) ⇒ Object 



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 396

def fetch_properties_uploads(properties)
  uploads = []
  properties[Labimotion::Prop::LAYERS].keys.each do |key|
    layer = properties[Labimotion::Prop::LAYERS][key]
    field_uploads = layer[Labimotion::Prop::FIELDS].select { |ss| ss['type'] == Labimotion::FieldType::UPLOAD }
    field_uploads.each do |field|
      ((field['value'] && field['value']['files']) || []).each do |file|
        uploads.push({ layer: key, field: field['field'], uid: file['uid'], filename: file['filename'] })
      end
    end
  end
  uploads
rescue StandardError => e
  Labimotion.log_exception(e, current_user)
  raise e
end

#fetch_repo(name, current_user) ⇒ Object 



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 521

def fetch_repo(name, current_user)
  # current_klasses = "Labimotion::#{name}".constantize.where.not(identifier: nil)&.pluck(:identifier) || []
  response = Labimotion::TemplateHub.list(name)
  # if response && response['list'].present? && response['list'].length.positive?
    # filter_list = response['list']&.reject do |ds|
    #   current_klasses.include?(ds['identifier'])
    # end || []
  # end
  # filter_list || []
  (response && response['list']) || []
rescue StandardError => e
  Labimotion.log_exception(e, current_user)
  { error: 'Cannot connect to Chemotion Repository' }
end

#fetch_repo_generic_template(klass, identifier) ⇒ Object 



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 513

def fetch_repo_generic_template(klass, identifier)
  Chemotion::Generic::Fetch::Template.exec(API::TARGET, klass, identifier)
end

#fetch_repo_generic_template_list(name = false) ⇒ Object 



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 517

def fetch_repo_generic_template_list(name = false)
  Chemotion::Generic::Fetch::Template.list(API::TARGET, name)
end

#generate_klass_file ⇒ Object 



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 387

def generate_klass_file
  klass_names_file = Labimotion::KLASSES_JSON # Rails.root.join('app/packs/klasses.json')
  klasses = Labimotion::ElementKlass.where(is_active: true)&.pluck(:name) || []
  File.write(klass_names_file, klasses)
rescue StandardError => e
  Labimotion.log_exception(e, current_user)
  raise e
end

#guard_restore_conflict!(name, klz) ⇒ Object

restore! writes through update_columns, so the uniqueness validations do not run, and no DB unique index backs them either. Restoring onto a taken identity would leave two active rows with the same one, and the ten find_by(name:) call sites in the gem — two of which pick the properties_release that renders real elements — would then resolve it arbitrarily. Refuse instead, and let a human decide which row keeps the name.



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 313

def guard_restore_conflict!(name, klz)
  keys = KLASS_IDENTITY[name]
  other = conflicting_active_klass(name, keys, klz)
  return if other.nil?

  error!({ mc: RESTORE_CONFLICT_MC,
           msg: restore_conflict_msg(name, other, keys),
           blocked_by: { id: other.id, label: klass_label(other, keys) } }, 409)
end

#guard_stale_template!(klz, properties) ⇒ Object

A template save replaces properties_template wholesale, so two designers holding the same template open used to overwrite each other with no warning and nothing to recover from: drafts are never snapshotted (Utils.next_version is a no-op for 'draft' and create_klasses_revision is skipped), and making drafts cut revisions is not an option because cutting a revision writes properties_release — it publishes.

update_template already mints a fresh uuid into the template on every save, so the stored uuid is a ready-made optimistic-locking token: the client posts back the uuid it was handed, and a difference means somebody saved in between.

Blank on either side means we cannot tell — a template stored before this guard existed, or a client that dropped the field — and a template with no stored uuid must not start refusing saves.



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 247

def guard_stale_template!(klz, properties)
  held = klz.properties_template.is_a?(Hash) ? klz.properties_template['uuid'] : nil
  sent = properties.is_a?(Hash) ? properties['uuid'] : nil
  return if held.blank? || sent.blank? || held == sent

  error!(stale_template_error(klz), 409)
end

#klass_family(klz) ⇒ Object

Family string (Constants::Family) for a loaded klass record — what the legacy gate keys on.



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 71

def klass_family(klz)
  Labimotion::Constants::Family::FAMILY_OF[klz.class.name.split('::').last]
end

#klass_label(klz, keys) ⇒ Object 



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 339

def klass_label(klz, keys)
  label = klz.respond_to?(:label) ? klz.label : nil
  label.blank? ? klz.public_send(keys.first).to_s : label
end

#list_klass_revisions(params) ⇒ Object 



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 377

def list_klass_revisions(params)
  klass = "Labimotion::#{params[:klass]}".constantize.find_by(id: params[:id])
  list = klass.send("#{params[:klass].underscore}es_revisions") unless klass.nil?
  list&.order(released_at: :desc)&.limit(params[:limit])
rescue StandardError => e
  Labimotion.log_exception(e, current_user)
  raise e
end

#restore_conflict_msg(name, other, keys) ⇒ Object 



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 334

def restore_conflict_msg(name, other, keys)
  "Cannot restore: the active #{name.gsub(/(Klass)/, '')} \"#{klass_label(other, keys)}\" " \
    "(id #{other.id}) already uses this #{KLASS_IDENTITY_NOUN[name]}."
end

#restore_klass(params) ⇒ Object 



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 284

def restore_klass(params)
  klz = fetch_deleted_klass(params[:klass], params[:id])
  # Restore is delete's inverse and carries the same cascade into elements, so it takes
  # the same :destroy level. Shares survive deletion, so the owner row is still there to
  # answer this.
  authorize_klass!(klz, :destroy)
  guard_restore_conflict!(params[:klass], klz)
  # `recursive` is what brings the template's elements/segments back with it; without it
  # paranoia restores the klass row alone and every child stays deleted. The window keeps
  # that cascade to the children deleted *with* the template.
  klz.restore!(recursive: true, recovery_window: RESTORE_RECOVERY_WINDOW)
  generate_klass_file if params[:klass] == 'ElementKlass'
  klz.reload
rescue StandardError => e
  Labimotion.log_exception(e, current_user)
  raise e
end

#revision_of_klass?(revision, klass, klass_name) ⇒ Boolean

The revision must belong to the klass the caller named: the klass row is what authorize_klass! (and the active-revision guard) runs on, so accepting a mismatched pair would let ownership of one template authorize deleting — even the active — revisions of another.

Returns:

  • (Boolean) 


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# File 'lib/labimotion/helpers/generic_helpers.rb', line 348

def revision_of_klass?(revision, klass, klass_name)
  foreign_key = "#{klass_name.sub('Klass', '_klass').downcase}_id"
  !klass.nil? && revision.public_send(foreign_key) == klass.id
end

#stale_template_error(klz) ⇒ Object

Naming the other designer is what turns a refusal into something a user can act on, but it is decoration: OwnerResolver.find returns nil rather than raising, so a lookup that fails costs the name and leaves the refusal itself intact.



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 258

def stale_template_error(klz)
  saver = Labimotion::OwnerResolver.find(klz.updated_by)
  name = saver.respond_to?(:name) ? saver.name : nil
  name = nil if name.blank?
  { mc: STALE_TEMPLATE_MC,
    msg: stale_template_msg(name, klz.updated_at),
    saved_by: { id: klz.updated_by, name: name },
    saved_at: klz.updated_at.blank? ? nil : klz.updated_at.iso8601 }
end

#stale_template_msg(name, saved_at) ⇒ Object 



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 268

def stale_template_msg(name, saved_at)
  who = name.blank? ? 'Another user' : name
  moment = saved_at.blank? ? 'after you opened it' : "at #{saved_at.strftime('%Y-%m-%d %H:%M %Z')}"
  "#{who} saved this template #{moment}, so your copy is out of date; " \
    'reload the template and re-apply your changes.'
end

#update_klass_settings(params) ⇒ Object 



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 185

def update_klass_settings(params)
  klz = fetch_klass(params[:klass], params[:id])
  authorize_klass!(klz, :write)
  klz&.update!(settings: (klz.settings || {}).merge(params[:settings] || {}))
  klz
rescue StandardError => e
  Labimotion.log_exception(e, current_user)
  raise e
end

#update_properties_upload(element, properties, att, pa) ⇒ Object 



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 413

def update_properties_upload(element, properties, att, pa)
  return if pa.nil?

  idx = properties[Labimotion::Prop::LAYERS][pa[:layer]][Labimotion::Prop::FIELDS].index { |fl| fl['field'] == pa[:field] }
  fidx = properties[Labimotion::Prop::LAYERS][pa[:layer]][Labimotion::Prop::FIELDS][idx]['value']['files'].index { |fi| fi['uid'] == pa[:uid] }
  properties[Labimotion::Prop::LAYERS][pa[:layer]][Labimotion::Prop::FIELDS][idx]['value']['files'][fidx]['aid'] = att.id
  properties[Labimotion::Prop::LAYERS][pa[:layer]][Labimotion::Prop::FIELDS][idx]['value']['files'][fidx]['uid'] = att.identifier
  element.update_columns(properties: properties)
rescue StandardError => e
  Labimotion.log_exception(e, current_user)
  raise e
end

#update_template(params, current_user) ⇒ Object 



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# File 'lib/labimotion/helpers/generic_helpers.rb', line 206

def update_template(params, current_user)
  klz = fetch_klass(params[:klass], params[:id])
  # The split that makes `editor` mean "drafting only": a draft save needs :write, while
  # anything else bumps the version and cuts a revision — publishing, which is :release.
  # Authorization before the stale check: who may act comes before whether the copy is fresh.
  authorize_klass!(klz, params[:release] == 'draft' ? :write : :release)
  guard_stale_template!(klz, params[:properties_template])
  uuid = SecureRandom.uuid
  properties = params[:properties_template]
  properties['uuid'] = uuid
  klz.version = Labimotion::Utils.next_version(params[:release], klz.version)
  properties['version'] = klz.version
  properties['pkg'] = Labimotion::Utils.pkg(params['pkg'] || (klz.properties_template && klz.properties_template['pkg']))
  properties['klass'] = klz.class.name.split('::').last
  properties['identifier'] = klz.identifier
  properties.delete('eln') if properties['eln'].present?
  klz.updated_by = current_user.id
  klz.properties_template = properties
  klz.metadata = params[:metadata] || {}
  klz.save!
  klz.reload
  klz.create_klasses_revision(current_user) if params[:release] != 'draft'
  klz
rescue StandardError => e
  Labimotion.log_exception(e, current_user)
  raise e
end