76 lines
2.0 KiB
TypeScript
76 lines
2.0 KiB
TypeScript
// Translate for example "-name" to [ [ 'name', 'DESC' ], [ 'id', 'ASC' ] ]
|
|
import { Sequelize } from 'sequelize-typescript'
|
|
|
|
type SortType = { sortModel: any, sortValue: string }
|
|
|
|
function getSort (value: string, lastSort: string[] = [ 'id', 'ASC' ]) {
|
|
let field: any
|
|
let direction: 'ASC' | 'DESC'
|
|
|
|
if (value.substring(0, 1) === '-') {
|
|
direction = 'DESC'
|
|
field = value.substring(1)
|
|
} else {
|
|
direction = 'ASC'
|
|
field = value
|
|
}
|
|
|
|
// Alias
|
|
if (field.toLowerCase() === 'match') field = Sequelize.col('similarity')
|
|
|
|
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 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),
|
|
|
|
searchTrigramNormalizeValue(value)
|
|
)
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
|
|
export {
|
|
SortType,
|
|
getSort,
|
|
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)))
|
|
}
|