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
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
|
package data
import (
"context"
"database/sql"
"strings"
"github.com/jpappel/atlas/pkg/index"
_ "github.com/mattn/go-sqlite3"
)
type Query struct {
db *sql.DB
}
// Append n copies of val to query
//
// output is in the form
//
// <query> <start><(n-1)*(<val><delim)>><val><delim><stop>
func BatchQuery[T any](query string, start string, val string, delim string, stop string, n int, baseArgs []T) (string, []any) {
args := make([]any, len(baseArgs))
for i, arg := range baseArgs {
args[i] = arg
}
b := strings.Builder{}
b.Grow(len(query) + 1 + len(start) + n*len(val) + ((n - 1) * len(delim)) + len(stop))
b.WriteString(query)
b.WriteRune(' ')
b.WriteString(start)
for range n - 1 {
b.WriteString(val)
b.WriteString(delim)
}
b.WriteString(val)
b.WriteString(stop)
return b.String(), args
}
func NewQuery(filename string) *Query {
query := &Query{NewDB(filename)}
return query
}
func NewDB(filename string) *sql.DB {
connStr := "file:" + filename + "?_fk=true&_journal=WAL"
db, err := sql.Open("sqlite3", connStr)
if err != nil {
panic(err)
}
if err := createSchema(db); err != nil {
panic(err)
}
return db
}
func NewMemDB() *sql.DB {
db, err := sql.Open("sqlite3", ":memory:?_fk=true")
if err != nil {
panic(err)
}
if err := createSchema(db); err != nil {
panic(err)
}
return db
}
func createSchema(db *sql.DB) error {
ctx := context.TODO()
tx, err := db.BeginTx(ctx, nil)
if err != nil {
return err
}
defer tx.Commit()
_, err = tx.Exec(`
CREATE TABLE IF NOT EXISTS Indexes(
root TEXT NOT NULL,
followSym DATE
)`)
if err != nil {
tx.Rollback()
return err
}
_, err = tx.Exec(`
CREATE TABLE IF NOT EXISTS Documents(
id INTEGER PRIMARY KEY,
path TEXT UNIQUE NOT NULL,
title TEXT,
date INT,
fileTime INT,
meta BLOB
)`)
if err != nil {
tx.Rollback()
return err
}
_, err = tx.Exec(`
CREATE TABLE IF NOT EXISTS Authors(
id INTEGER PRIMARY KEY,
name TEXT UNIQUE NOT NULL
)`)
if err != nil {
tx.Rollback()
return err
}
_, err = tx.Exec(`
CREATE TABLE IF NOT EXISTS Aliases(
authorId INT NOT NULL,
alias TEXT UNIQUE NOT NULL,
FOREIGN KEY (authorId) REFERENCES Authors(id)
)`)
if err != nil {
tx.Rollback()
return err
}
_, err = tx.Exec(`
CREATE TABLE IF NOT EXISTS Tags(
id INTEGER PRIMARY KEY,
name TEXT UNIQUE NOT NULL
)`)
if err != nil {
tx.Rollback()
return err
}
_, err = tx.Exec(`
CREATE TABLE IF NOT EXISTS Links(
referencedId INT,
refererId INT,
FOREIGN KEY (referencedId) REFERENCES Documents(id),
FOREIGN KEY (refererId) REFERENCES Documents(id)
)`)
if err != nil {
tx.Rollback()
return err
}
_, err = tx.Exec(`
CREATE TABLE IF NOT EXISTS DocumentAuthors(
docId INT NOT NULL,
authorId INT NOT NULL,
FOREIGN KEY (docId) REFERENCES Documents(id),
FOREIGN KEY (authorId) REFERENCES Authors(id)
)`)
if err != nil {
tx.Rollback()
return err
}
_, err = tx.Exec(`
CREATE TABLE IF NOT EXISTS DocumentTags(
docId INT NOT NULL,
tagId INT NOT NULL,
FOREIGN KEY (docId) REFERENCES Documents(id),
FOREIGN KEY (tagId) REFERENCES Tags(id),
UNIQUE(docId, tagId)
)`)
if err != nil {
tx.Rollback()
return err
}
_, err = tx.Exec("CREATE INDEX IF NOT EXISTS idx_doc_dates ON Documents (date)")
if err != nil {
tx.Rollback()
return err
}
_, err = tx.Exec("CREATE INDEX IF NOT EXISTS idx_doc_titles ON Documents (title)")
if err != nil {
tx.Rollback()
return err
}
_, err = tx.Exec("CREATE INDEX IF NOT EXISTS idx_aliases_alias ON Aliases(alias)")
if err != nil {
tx.Rollback()
return err
}
_, err = tx.Exec("CREATE INDEX IF NOT EXISTS idx_aliases_authorId ON Aliases(authorId)")
if err != nil {
tx.Rollback()
return err
}
_, err = tx.Exec("CREATE INDEX IF NOT EXISTS idx_doctags_tagid ON DocumentTags (tagId)")
if err != nil {
tx.Rollback()
return err
}
return nil
}
func (q Query) Close() error {
return q.db.Close()
}
// Create an index
func (q Query) Get(indexRoot string) (*index.Index, error) {
ctx := context.TODO()
docs, err := FillMany{Db: q.db}.Get(ctx)
if err != nil {
return nil, err
}
idx := &index.Index{
Root: indexRoot,
Documents: docs,
Filters: index.DefaultFilters(),
}
return idx, nil
}
// Write from index to database
func (q Query) Put(idx index.Index) error {
ctx := context.TODO()
insertCtx, cancel := context.WithCancelCause(ctx)
defer cancel(nil)
p, err := NewPutMany(q.db, idx.Documents)
if err != nil {
return err
}
if err := p.Insert(insertCtx); err != nil {
return err
}
return nil
}
// Update database with values from index
func (q Query) Update(idx index.Index) error {
// TODO: implement
return nil
}
func (q Query) GetDocument(path string) (*index.Document, error) {
ctx := context.TODO()
f := Fill{Path: path, Db: q.db}
return f.Get(ctx)
}
|
