164 lines
3.7 KiB
Go
164 lines
3.7 KiB
Go
/*
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Package query contains frequently used database queries for use in commands and API.
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Copyright (c) 2018 - 2020 Michael Mayer <hello@photoprism.org>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published
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by the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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PhotoPrism® is a registered trademark of Michael Mayer. You may use it as required
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to describe our software, run your own server, for educational purposes, but not for
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offering commercial goods, products, or services without prior written permission.
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In other words, please ask.
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Feel free to send an e-mail to hello@photoprism.org if you have questions,
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want to support our work, or just want to say hello.
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Additional information can be found in our Developer Guide:
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https://docs.photoprism.org/developer-guide/
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*/
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package query
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import (
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"fmt"
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"strings"
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"github.com/gosimple/slug"
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"github.com/photoprism/photoprism/internal/entity"
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"github.com/photoprism/photoprism/internal/event"
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"github.com/photoprism/photoprism/pkg/txt"
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"github.com/jinzhu/gorm"
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"github.com/jinzhu/inflection"
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)
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var log = event.Log
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const (
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MySQL = "mysql"
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SQLite = "sqlite3"
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OrSep = "|"
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)
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// Max result limit for queries.
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const MaxResults = 10000
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// About 1km ('good enough' for now)
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const SearchRadius = 0.009
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// Query searches given an originals path and a db instance.
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type Query struct {
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db *gorm.DB
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}
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// SearchCount is the total number of search hits.
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type SearchCount struct {
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Total int
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}
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// New returns a new Query type with a given path and db instance.
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func New(db *gorm.DB) *Query {
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q := &Query{
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db: db,
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}
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return q
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}
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// Db returns a database connection instance.
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func Db() *gorm.DB {
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return entity.Db()
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}
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// UnscopedDb returns an unscoped database connection instance.
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func UnscopedDb() *gorm.DB {
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return entity.Db().Unscoped()
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}
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// DbDialect returns the sql dialect name.
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func DbDialect() string {
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return Db().Dialect().GetName()
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}
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// LikeAny returns a where condition that matches any keyword in search.
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func LikeAny(col, search string) (where string) {
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var wheres []string
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words := txt.UniqueKeywords(search)
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if len(words) == 0 {
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return ""
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}
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for _, w := range words {
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if len(w) > 3 {
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wheres = append(wheres, fmt.Sprintf("%s LIKE '%s%%'", col, w))
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} else {
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wheres = append(wheres, fmt.Sprintf("%s = '%s'", col, w))
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}
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if !txt.ContainsASCIILetters(w) {
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continue
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}
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singular := inflection.Singular(w)
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if singular != w {
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wheres = append(wheres, fmt.Sprintf("%s = '%s'", col, singular))
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}
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}
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return strings.Join(wheres, " OR ")
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}
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// AnySlug returns a where condition that matches any slug in search.
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func AnySlug(col, search, sep string) (where string) {
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if search == "" {
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return ""
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}
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if sep == "" {
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sep = " "
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}
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var wheres []string
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var words []string
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for _, w := range strings.Split(search, sep) {
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w = strings.TrimSpace(w)
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words = append(words, slug.Make(w))
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if !txt.ContainsASCIILetters(w) {
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continue
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}
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singular := inflection.Singular(w)
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if singular != w {
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words = append(words, slug.Make(singular))
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}
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}
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if len(words) == 0 {
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return ""
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}
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for _, w := range words {
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wheres = append(wheres, fmt.Sprintf("%s = '%s'", col, w))
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}
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return strings.Join(wheres, " OR ")
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}
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