techknowlogick
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// Copyright 2023 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package issues
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import (
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"context"
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"strconv"
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"sync"
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"time"
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"github.com/meilisearch/meilisearch-go"
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)
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var _ Indexer = &MeilisearchIndexer{}
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// MeilisearchIndexer implements Indexer interface
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type MeilisearchIndexer struct {
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client *meilisearch.Client
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indexerName string
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available bool
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availabilityCallback func(bool)
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stopTimer chan struct{}
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lock sync.RWMutex
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}
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// MeilisearchIndexer creates a new meilisearch indexer
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func NewMeilisearchIndexer(url, apiKey, indexerName string) (*MeilisearchIndexer, error) {
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client := meilisearch.NewClient(meilisearch.ClientConfig{
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Host: url,
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APIKey: apiKey,
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})
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indexer := &MeilisearchIndexer{
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client: client,
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indexerName: indexerName,
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available: true,
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stopTimer: make(chan struct{}),
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}
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ticker := time.NewTicker(10 * time.Second)
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go func() {
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for {
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select {
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case <-ticker.C:
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indexer.checkAvailability()
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case <-indexer.stopTimer:
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ticker.Stop()
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return
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}
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}
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}()
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return indexer, nil
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}
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// Init will initialize the indexer
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func (b *MeilisearchIndexer) Init() (bool, error) {
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_, err := b.client.GetIndex(b.indexerName)
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if err == nil {
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return true, nil
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}
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_, err = b.client.CreateIndex(&meilisearch.IndexConfig{
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Uid: b.indexerName,
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PrimaryKey: "id",
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})
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if err != nil {
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return false, b.checkError(err)
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}
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_, err = b.client.Index(b.indexerName).UpdateFilterableAttributes(&[]string{"repo_id"})
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return false, b.checkError(err)
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}
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// SetAvailabilityChangeCallback sets callback that will be triggered when availability changes
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func (b *MeilisearchIndexer) SetAvailabilityChangeCallback(callback func(bool)) {
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b.lock.Lock()
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defer b.lock.Unlock()
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b.availabilityCallback = callback
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}
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// Ping checks if meilisearch is available
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func (b *MeilisearchIndexer) Ping() bool {
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b.lock.RLock()
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defer b.lock.RUnlock()
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return b.available
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}
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// Index will save the index data
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func (b *MeilisearchIndexer) Index(issues []*IndexerData) error {
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if len(issues) == 0 {
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return nil
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}
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for _, issue := range issues {
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_, err := b.client.Index(b.indexerName).AddDocuments(issue)
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if err != nil {
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return b.checkError(err)
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}
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}
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// TODO: bulk send index data
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return nil
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}
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// Delete deletes indexes by ids
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func (b *MeilisearchIndexer) Delete(ids ...int64) error {
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if len(ids) == 0 {
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return nil
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}
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for _, id := range ids {
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_, err := b.client.Index(b.indexerName).DeleteDocument(strconv.FormatInt(id, 10))
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if err != nil {
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return b.checkError(err)
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}
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}
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// TODO: bulk send deletes
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return nil
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}
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// Search searches for issues by given conditions.
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// Returns the matching issue IDs
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func (b *MeilisearchIndexer) Search(ctx context.Context, keyword string, repoIDs []int64, limit, start int) (*SearchResult, error) {
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filter := make([][]string, 0, len(repoIDs))
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for _, repoID := range repoIDs {
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filter = append(filter, []string{"repo_id = " + strconv.FormatInt(repoID, 10)})
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}
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searchRes, err := b.client.Index(b.indexerName).Search(keyword, &meilisearch.SearchRequest{
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Filter: filter,
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Limit: int64(limit),
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Offset: int64(start),
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})
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if err != nil {
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return nil, b.checkError(err)
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}
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hits := make([]Match, 0, len(searchRes.Hits))
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for _, hit := range searchRes.Hits {
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hits = append(hits, Match{
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ID: int64(hit.(map[string]interface{})["id"].(float64)),
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})
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}
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return &SearchResult{
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Total: searchRes.TotalHits,
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Hits: hits,
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}, nil
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}
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// Close implements indexer
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func (b *MeilisearchIndexer) Close() {
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select {
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case <-b.stopTimer:
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default:
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close(b.stopTimer)
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}
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}
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func (b *MeilisearchIndexer) checkError(err error) error {
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return err
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}
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func (b *MeilisearchIndexer) checkAvailability() {
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_, err := b.client.Health()
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if err != nil {
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b.setAvailability(false)
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return
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}
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b.setAvailability(true)
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}
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func (b *MeilisearchIndexer) setAvailability(available bool) {
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b.lock.Lock()
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defer b.lock.Unlock()
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if b.available == available {
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return
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}
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b.available = available
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if b.availabilityCallback != nil {
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// Call the callback from within the lock to ensure that the ordering remains correct
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b.availabilityCallback(b.available)
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}
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}
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