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
|
package query
import (
"encoding/json"
"fmt"
"strings"
"github.com/jpappel/atlas/pkg/index"
)
const DefaultOutputFormat string = "%p %T %d authors:%a tags:%t"
type OutputToken uint64
// TODO: support long token names
const (
OUT_TOK_STR OutputToken = iota
OUT_TOK_PATH // %p %path
OUT_TOK_TITLE // %T %title
OUT_TOK_DATE // %d %date
OUT_TOK_FILETIME // %f %filetime
OUT_TOK_AUTHORS // %a %authors
OUT_TOK_TAGS // %t %tags
OUT_TOK_LINKS // %l %links
OUT_TOK_META // %m %meta
)
// TODO: change interface to use byte slices
type Outputer interface {
OutputOne(doc *index.Document) (string, error)
Output(docs []*index.Document) (string, error)
}
type DefaultOutput struct{}
type JsonOutput struct{}
type CustomOutput struct {
stringTokens []string
tokens []OutputToken
datetimeFormat string
}
// compile time interface check
var _ Outputer = &DefaultOutput{}
var _ Outputer = &JsonOutput{}
var _ Outputer = &CustomOutput{}
// Returns "<path> <title> <date> authors:<authors...> tags:<tags>"
// and a nil error
func (o DefaultOutput) OutputOne(doc *index.Document) (string, error) {
b := strings.Builder{}
o.writeDoc(&b, doc)
return b.String(), nil
}
func (o DefaultOutput) Output(docs []*index.Document) (string, error) {
b := strings.Builder{}
for i, doc := range docs {
o.writeDoc(&b, doc)
if i != len(docs)-1 {
b.WriteRune('\n')
}
}
return b.String(), nil
}
func (o DefaultOutput) writeDoc(b *strings.Builder, doc *index.Document) bool {
if b == nil {
return false
}
b.WriteString(doc.Path)
b.WriteRune(' ')
b.WriteString(doc.Title)
b.WriteRune(' ')
b.WriteString(doc.Date.String())
b.WriteRune(' ')
b.WriteString("authors:")
b.WriteString(strings.Join(doc.Authors, ","))
b.WriteString(" tags:")
b.WriteString(strings.Join(doc.Tags, ","))
return true
}
func (o JsonOutput) OutputOne(doc *index.Document) (string, error) {
b, err := json.Marshal(doc)
if err != nil {
return "", err
}
return string(b), nil
}
func (o JsonOutput) Output(docs []*index.Document) (string, error) {
b, err := json.Marshal(docs)
if err != nil {
return "", err
}
return string(b), nil
}
func parseOutputFormat(formatStr string) ([]OutputToken, []string, error) {
toks := make([]OutputToken, 0, 16)
curTok := make([]rune, 0, 16)
strToks := make([]string, 0, 8)
for _, c := range formatStr {
if c == '%' && len(curTok) > 0 && curTok[0] != '%' {
strToks = append(strToks, string(curTok))
toks = append(toks, OUT_TOK_STR)
curTok = curTok[:0]
curTok = append(curTok, c)
continue
}
curTok = append(curTok, c)
if curTok[0] == '%' && len(curTok) == 2 {
switch string(curTok) {
case "%%":
strToks = append(strToks, "%")
toks = append(toks, OUT_TOK_STR)
case "%p":
toks = append(toks, OUT_TOK_PATH)
case "%T":
toks = append(toks, OUT_TOK_TITLE)
case "%d":
toks = append(toks, OUT_TOK_DATE)
case "%f":
toks = append(toks, OUT_TOK_FILETIME)
case "%a":
toks = append(toks, OUT_TOK_AUTHORS)
case "%t":
toks = append(toks, OUT_TOK_TAGS)
case "%l":
toks = append(toks, OUT_TOK_LINKS)
case "%m":
toks = append(toks, OUT_TOK_META)
default:
return nil, nil, ErrUnrecognizedOutputToken
}
curTok = curTok[:0]
}
}
if len(curTok) != 0 && curTok[len(curTok)-1] == '%' {
fmt.Println("2")
return nil, nil, ErrUnrecognizedOutputToken
} else if len(curTok) != 0 {
strToks = append(strToks, string(curTok))
toks = append(toks, OUT_TOK_STR)
}
return toks, strToks, nil
}
func NewCustomOutput(formatStr string, datetimeFormat string) (CustomOutput, error) {
outToks, strToks, err := parseOutputFormat(formatStr)
if err != nil {
return CustomOutput{}, err
}
return CustomOutput{strToks, outToks, datetimeFormat}, nil
}
func (o CustomOutput) OutputOne(doc *index.Document) (string, error) {
b := strings.Builder{}
// TODO: determine realistic initial capacity
if err := o.writeDoc(&b, doc); err != nil {
return "", err
}
return b.String(), nil
}
func (o CustomOutput) Output(docs []*index.Document) (string, error) {
b := strings.Builder{}
// TODO: determine realistic initial capacity
for i, doc := range docs {
if err := o.writeDoc(&b, doc); err != nil {
return "", err
}
if i != len(docs)-1 {
b.WriteRune('\n')
}
}
return b.String(), nil
}
func (o CustomOutput) writeDoc(b *strings.Builder, doc *index.Document) error {
curStrTok := 0
for _, token := range o.tokens {
switch token {
case OUT_TOK_STR:
if curStrTok >= len(o.stringTokens) {
return ErrExpectedMoreStringTokens
}
b.WriteString(o.stringTokens[curStrTok])
curStrTok++
case OUT_TOK_PATH:
b.WriteString(doc.Path)
case OUT_TOK_TITLE:
b.WriteString(doc.Title)
case OUT_TOK_DATE:
b.WriteString(doc.Date.Format(o.datetimeFormat))
case OUT_TOK_FILETIME:
b.WriteString(doc.FileTime.Format(o.datetimeFormat))
case OUT_TOK_AUTHORS:
b.WriteString(strings.Join(doc.Authors, ", "))
case OUT_TOK_TAGS:
b.WriteString(strings.Join(doc.Tags, ", "))
case OUT_TOK_LINKS:
b.WriteString(strings.Join(doc.Links, ", "))
case OUT_TOK_META:
b.WriteString(doc.OtherMeta)
default:
return ErrUnrecognizedOutputToken
}
}
return nil
}
|
