gotosocial/internal/util/unique.go
kim 84279f6a6a
[performance] cache more database calls, reduce required database calls overall (#3290)
* improvements to caching for lists and relationship to accounts / follows

* fix nil panic in AddToList()

* ensure list related caches are correctly invalidated

* ensure returned ID lists are ordered correctly

* bump go-structr to v0.8.9 (returns early if zero uncached keys to be loaded)

* remove zero checks in uncached key load functions (go-structr now handles this)

* fix issues after rebase on upstream/main

* update the expected return order of CSV exports (since list entries are now down by entry creation date)

* rename some funcs, allow deleting list entries for multiple follow IDs at a time, fix up more tests

* use returning statements on delete to get cache invalidation info

* fixes to recent database delete changes

* fix broken list entries delete sql

* remove unused db function

* update remainder of delete functions to behave in similar way, some other small tweaks

* fix delete user sql, allow returning on err no entries

* uncomment + fix list database tests

* update remaining list tests

* update envparsing test

* add comments to each specific key being invalidated

* add more cache invalidation explanatory comments

* whoops; actually delete poll votes from database in the DeletePollByID() func

* remove added but-commented-out field

* improved comment regarding paging being disabled

* make cache invalidation comments match what's actually happening

* fix up delete query comments to match what is happening

* rename function to read a bit better

* don't use ErrNoEntries on delete when not needed (it's only needed for a RETURNING call)

* update function name in test

* move list exclusivity check to AFTER eligibility check. use log.Panic() instead of panic()

* use the poll_id column in poll_votes for selecting votes in poll ID

* fix function name
2024-09-16 16:46:09 +00:00

96 lines
2.3 KiB
Go

// GoToSocial
// Copyright (C) GoToSocial Authors admin@gotosocial.org
// SPDX-License-Identifier: AGPL-3.0-or-later
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package util
// KeyBy creates a map of T->S, keyed by value returned from key func.
func KeyBy[S any, T comparable](in []S, key func(S) T) map[T]S {
if key == nil {
panic("nil func")
}
m := make(map[T]S, len(in))
for _, v := range in {
m[key(v)] = v
}
return m
}
// Set represents a hashmap of only keys,
// useful for deduplication / key checking.
type Set[T comparable] map[T]struct{}
// ToSet creates a Set[T] from given values.
func ToSet[T comparable](in []T) Set[T] {
set := make(Set[T], len(in))
for _, v := range in {
set[v] = struct{}{}
}
return set
}
// ToSetFunc creates a Set[T] from input slice, keys provided by func.
func ToSetFunc[S any, T comparable](in []S, key func(S) T) Set[T] {
if key == nil {
panic("nil func")
}
set := make(Set[T], len(in))
for _, v := range in {
set[key(v)] = struct{}{}
}
return set
}
// FromSet extracts the values from set to slice.
func FromSet[T comparable](in Set[T]) []T {
out := make([]T, len(in))
var i int
for v := range in {
out[i] = v
i++
}
return out
}
// In returns input slice filtered to
// only contain those in receiving set.
func (s Set[T]) In(vs []T) []T {
out := make([]T, 0, len(vs))
for _, v := range vs {
if _, ok := s[v]; ok {
out = append(out, v)
}
}
return out
}
// NotIn is the functional inverse of In().
func (s Set[T]) NotIn(vs []T) []T {
out := make([]T, 0, len(vs))
for _, v := range vs {
if _, ok := s[v]; !ok {
out = append(out, v)
}
}
return out
}
// Has returns if value is in Set.
func (s Set[T]) Has(v T) bool {
_, ok := s[v]
return ok
}