1package query
2
3import (
4 "fmt"
5
6 "github.com/MichaelMure/git-bug/bug"
7)
8
9// Parse parse a query DSL
10//
11// Ex: "status:open author:descartes sort:edit-asc"
12//
13// Supported filter qualifiers and syntax are described in docs/queries.md
14func Parse(query string) (*Query, error) {
15 tokens, err := tokenize(query)
16 if err != nil {
17 return nil, err
18 }
19
20 q := &Query{
21 OrderBy: OrderByCreation,
22 OrderDirection: OrderDescending,
23 }
24 sortingDone := false
25
26 for _, t := range tokens {
27 switch t.kind {
28 case tokenKindSearch:
29 q.Search = append(q.Search, t.term)
30 break
31
32 case tokenKindKV:
33 switch t.qualifier {
34 case "status", "state":
35 status, err := bug.StatusFromString(t.value)
36 if err != nil {
37 return nil, err
38 }
39 q.Status = append(q.Status, status)
40 case "author":
41 q.Author = append(q.Author, t.value)
42 case "actor":
43 q.Actor = append(q.Actor, t.value)
44 case "participant":
45 q.Participant = append(q.Participant, t.value)
46 case "label":
47 q.Label = append(q.Label, t.value)
48 case "title":
49 q.Title = append(q.Title, t.value)
50 case "no":
51 switch t.value {
52 case "label":
53 q.NoLabel = true
54 default:
55 return nil, fmt.Errorf("unknown \"no\" filter \"%s\"", t.value)
56 }
57 case "sort":
58 if sortingDone {
59 return nil, fmt.Errorf("multiple sorting")
60 }
61 err = parseSorting(q, t.value)
62 if err != nil {
63 return nil, err
64 }
65 sortingDone = true
66
67 default:
68 return nil, fmt.Errorf("unknown qualifier \"%s\"", t.qualifier)
69 }
70
71 case tokenKindKVV:
72 switch t.qualifier {
73 case "metadata":
74 if len(t.subQualifier) == 0 {
75 return nil, fmt.Errorf("empty value for sub-qualifier \"metadata:%s\"", t.subQualifier)
76 }
77 var pair StringPair
78 pair.Key = t.subQualifier
79 pair.Value = t.value
80 q.Metadata = append(q.Metadata, pair)
81
82 default:
83 return nil, fmt.Errorf("unknown qualifier \"%s:%s\"", t.qualifier, t.subQualifier)
84 }
85 }
86 }
87 return q, nil
88}
89
90func parseSorting(q *Query, value string) error {
91 switch value {
92 // default ASC
93 case "id-desc":
94 q.OrderBy = OrderById
95 q.OrderDirection = OrderDescending
96 case "id", "id-asc":
97 q.OrderBy = OrderById
98 q.OrderDirection = OrderAscending
99
100 // default DESC
101 case "creation", "creation-desc":
102 q.OrderBy = OrderByCreation
103 q.OrderDirection = OrderDescending
104 case "creation-asc":
105 q.OrderBy = OrderByCreation
106 q.OrderDirection = OrderAscending
107
108 // default DESC
109 case "edit", "edit-desc":
110 q.OrderBy = OrderByEdit
111 q.OrderDirection = OrderDescending
112 case "edit-asc":
113 q.OrderBy = OrderByEdit
114 q.OrderDirection = OrderAscending
115
116 default:
117 return fmt.Errorf("unknown sorting %s", value)
118 }
119
120 return nil
121}