1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
package index
import (
"bytes"
"context"
"encoding/gob"
"go.alanpearce.eu/searchix/internal/config"
"go.alanpearce.eu/searchix/internal/nix"
"go.alanpearce.eu/x/log"
"github.com/blevesearch/bleve/v2"
"github.com/blevesearch/bleve/v2/analysis/analyzer/standard"
"github.com/blevesearch/bleve/v2/search"
"github.com/blevesearch/bleve/v2/search/query"
"github.com/pkg/errors"
)
const ResultsPerPage = 20
type DocumentMatch struct {
*search.DocumentMatch
Data nix.Importable
}
type Result struct {
*bleve.SearchResult
Hits []DocumentMatch
}
type ReadIndex struct {
index bleve.Index
log *log.Logger
meta *Meta
}
func (index *ReadIndex) GetEnabledSources() ([]string, error) {
facet := bleve.NewFacetRequest("Source", 100)
query := bleve.NewMatchAllQuery()
search := bleve.NewSearchRequest(query)
search.AddFacet("Source", facet)
results, err := index.index.Search(search)
if err != nil {
return nil, errors.WithMessage(err, "could not get list of enabled sources from index")
}
enabledSources := make([]string, results.Facets["Source"].Terms.Len())
for i, term := range results.Facets["Source"].Terms.Terms() {
enabledSources[i] = term.Term
}
return enabledSources, nil
}
func (index *ReadIndex) GetSource(
ctx context.Context,
source *config.Source,
) (*bleve.SearchResult, error) {
var query query.Query
if source == nil {
query = bleve.NewMatchAllQuery()
} else {
tq := bleve.NewTermQuery(source.Name)
tq.SetField("Source")
query = tq
}
search := bleve.NewSearchRequest(query)
result, err := index.index.SearchInContext(ctx, search)
select {
case <-ctx.Done():
return nil, ctx.Err()
default:
if err != nil {
return nil, errors.WithMessagef(
err,
"failed to execute search to find source %s in index",
source,
)
}
}
return result, nil
}
func setField(
q query.FieldableQuery,
field string,
) query.FieldableQuery {
q.SetField(field)
return q
}
func (index *ReadIndex) search(
ctx context.Context,
request *bleve.SearchRequest,
) (*Result, error) {
request.Fields = []string{"_data", "Source"}
bleveResult, err := index.index.SearchInContext(ctx, request)
select {
case <-ctx.Done():
return nil, ctx.Err()
default:
if err != nil {
return nil, errors.WithMessage(err, "failed to execute search query")
}
results := make([]DocumentMatch, bleveResult.Hits.Len())
var buf bytes.Buffer
for i, result := range bleveResult.Hits {
results[i].DocumentMatch = bleveResult.Hits[i]
_, err = buf.WriteString(result.Fields["_data"].(string))
if err != nil {
return nil, errors.WithMessage(err, "error fetching result data")
}
err = gob.NewDecoder(&buf).Decode(&results[i].Data)
if err != nil {
return nil, errors.WithMessagef(err, "error decoding gob data: %s", buf.String())
}
buf.Reset()
}
return &Result{
SearchResult: bleveResult,
Hits: results,
}, nil
}
}
func (index *ReadIndex) Search(
ctx context.Context,
source *config.Source,
keyword string,
from uint64,
) (*Result, error) {
query := bleve.NewBooleanQuery()
// match the user's query in any field ...
userQuery := bleve.NewMatchQuery(keyword)
userQuery.Analyzer = "option_name"
if source != nil {
query.AddMust(
setField(bleve.NewTermQuery(source.Key), "Source"),
userQuery,
)
}
// ...and boost it if it matches any of these
query.AddShould(
setField(bleve.NewMatchQuery(keyword), "MainProgram"),
setField(bleve.NewMatchQuery(keyword), "Name"),
setField(bleve.NewMatchQuery(keyword), "Attribute"),
)
query.AddShould(
setField(bleve.NewMatchQuery(keyword), "Loc"),
setField(bleve.NewMatchQuery(keyword), "Name"),
)
nameLiteralQuery := bleve.NewMatchQuery(keyword)
nameLiteralQuery.SetField("Name")
nameLiteralQuery.Analyzer = standard.Name
query.AddShould(nameLiteralQuery)
search := bleve.NewSearchRequest(query)
search.Size = ResultsPerPage
if from != 0 {
search.From = int(from)
}
return index.search(ctx, search)
}
func (index *ReadIndex) GetDocument(
ctx context.Context,
source *config.Source,
id string,
) (*nix.Importable, error) {
key := nix.MakeKey(source, id)
query := bleve.NewDocIDQuery([]string{key})
search := bleve.NewSearchRequest(query)
result, err := index.search(ctx, search)
if err != nil {
return nil, err
}
return &result.Hits[0].Data, err
}
|