+ createSimilarityAttribute,
+ throwIfNotValid,
+ buildTrigramSearchIndex
+}
+
+// ---------------------------------------------------------------------------
+
+function searchTrigramNormalizeValue (value: string) {
+ return Sequelize.fn('lower', Sequelize.fn('immutable_unaccent', value))
+}
+
+function searchTrigramNormalizeCol (col: string) {
+ return Sequelize.fn('lower', Sequelize.fn('immutable_unaccent', Sequelize.col(col)))
+}
+
+function buildDirectionAndField (value: string) {
+ let field: any
+ let direction: 'ASC' | 'DESC'
+
+ if (value.substring(0, 1) === '-') {
+ direction = 'DESC'
+ field = value.substring(1)
+ } else {
+ direction = 'ASC'
+ field = value
+ }
+
+ return { direction, field }