+function getBlacklistSort (model: any, value: string, lastSort: OrderItem = [ 'id', 'ASC' ]): OrderItem[] {
+ const [ firstSort ] = getSort(value)
+
+ if (model) return [ [ literal(`"${model}.${firstSort[ 0 ]}" ${firstSort[ 1 ]}`) ], lastSort ] as any[] // FIXME: typings
+ return [ firstSort, lastSort ]
+}
+
+function getFollowsSort (value: string, lastSort: OrderItem = [ 'id', 'ASC' ]): OrderItem[] {
+ const { direction, field } = buildDirectionAndField(value)
+
+ if (field === 'redundancyAllowed') {
+ return [
+ [ 'ActorFollowing', 'Server', 'redundancyAllowed', direction ],
+ lastSort
+ ]
+ }
+
+ return getSort(value, lastSort)
+}
+
+function isOutdated (model: { createdAt: Date, updatedAt: Date }, refreshInterval: number) {
+ const now = Date.now()
+ const createdAtTime = model.createdAt.getTime()
+ const updatedAtTime = model.updatedAt.getTime()
+
+ return (now - createdAtTime) > refreshInterval && (now - updatedAtTime) > refreshInterval
+}
+
+function throwIfNotValid (value: any, validator: (value: any) => boolean, fieldName = 'value', nullable = false) {
+ if (nullable && (value === null || value === undefined)) return
+
+ if (validator(value) === false) {
+ throw new Error(`"${value}" is not a valid ${fieldName}.`)
+ }
+}
+
+function buildTrigramSearchIndex (indexName: string, attribute: string) {
+ return {
+ name: indexName,
+ fields: [ Sequelize.literal('lower(immutable_unaccent(' + attribute + '))') as any ],
+ using: 'gin',
+ operator: 'gin_trgm_ops'
+ }
+}
+
+function createSimilarityAttribute (col: string, value: string) {
+ return Sequelize.fn(
+ 'similarity',
+
+ searchTrigramNormalizeCol(col),