-// Translate for example "-name" to [ 'name', 'DESC' ]
-function getSort (value: string) {
- let field: string
- let direction: 'ASC' | 'DESC'
+import { Sequelize } from 'sequelize-typescript'
- if (value.substring(0, 1) === '-') {
- direction = 'DESC'
- field = value.substring(1)
- } else {
- direction = 'ASC'
- field = value
+type SortType = { sortModel: any, sortValue: string }
+
+// Translate for example "-name" to [ [ 'name', 'DESC' ], [ 'id', 'ASC' ] ]
+function getSort (value: string, lastSort: string[] = [ 'id', 'ASC' ]) {
+ let { direction, field } = buildDirectionAndField(value)
+
+ if (field.toLowerCase() === 'match') { // Search
+ field = Sequelize.col('similarity')
}
- return [ field, direction ]
+ return [ [ field, direction ], lastSort ]
+}
+
+function getVideoSort (value: string, lastSort: string[] = [ 'id', 'ASC' ]) {
+ let { direction, field } = buildDirectionAndField(value)
+
+ // Alias
+ if (field.toLowerCase() === 'match') { // Search
+ field = Sequelize.col('similarity')
+ } else if (field.toLowerCase() === 'trending') { // Sort by aggregation
+ return [
+ [ Sequelize.fn('COALESCE', Sequelize.fn('SUM', Sequelize.col('VideoViews.views')), '0'), direction ],
+
+ [ Sequelize.col('VideoModel.views'), direction ],
+
+ lastSort
+ ]
+ }
+
+ return [ [ field, direction ], lastSort ]
+}
+
+function getSortOnModel (model: any, value: string, lastSort: string[] = [ 'id', 'ASC' ]) {
+ let [ firstSort ] = getSort(value)
+
+ if (model) return [ [ model, firstSort[0], firstSort[1] ], lastSort ]
+ return [ firstSort, lastSort ]
+}
+
+function throwIfNotValid (value: any, validator: (value: any) => boolean, fieldName = 'value') {
+ if (validator(value) === false) {
+ throw new Error(`"${value}" is not a valid ${fieldName}.`)
+ }
}
-function addMethodsToModel (model: any, classMethods: Function[], instanceMethods: Function[] = []) {
- classMethods.forEach(m => model[m.name] = m)
- instanceMethods.forEach(m => model.prototype[m.name] = m)
+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 getSortOnModel (model: any, value: string) {
- let sort = getSort(value)
+function createSimilarityAttribute (col: string, value: string) {
+ return Sequelize.fn(
+ 'similarity',
+
+ searchTrigramNormalizeCol(col),
- if (model) return [ { model: model }, sort[0], sort[1] ]
- return sort
+ searchTrigramNormalizeValue(value)
+ )
}
// ---------------------------------------------------------------------------
export {
- addMethodsToModel,
+ SortType,
getSort,
- getSortOnModel
+ getVideoSort,
+ getSortOnModel,
+ 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 }
}