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package query
import (
"fmt"
"github.com/MichaelMure/git-bug/bug"
)
// Parse parse a query DSL
//
// Ex: "status:open author:descartes sort:edit-asc"
//
// Supported filter qualifiers and syntax are described in docs/queries.md
func Parse(query string) (*Query, error) {
tokens, err := tokenize(query)
if err != nil {
return nil, err
}
q := &Query{
OrderBy: OrderByCreation,
OrderDirection: OrderDescending,
}
sortingDone := false
for _, t := range tokens {
switch t.kind {
case tokenKindSearch:
q.Search = append(q.Search, t.term)
break
case tokenKindKV:
switch t.qualifier {
case "status", "state":
status, err := bug.StatusFromString(t.value)
if err != nil {
return nil, err
}
q.Status = append(q.Status, status)
case "author":
q.Author = append(q.Author, t.value)
case "actor":
q.Actor = append(q.Actor, t.value)
case "participant":
q.Participant = append(q.Participant, t.value)
case "label":
q.Label = append(q.Label, t.value)
case "title":
q.Title = append(q.Title, t.value)
case "no":
switch t.value {
case "label":
q.NoLabel = true
default:
return nil, fmt.Errorf("unknown \"no\" filter \"%s\"", t.value)
}
case "sort":
if sortingDone {
return nil, fmt.Errorf("multiple sorting")
}
err = parseSorting(q, t.value)
if err != nil {
return nil, err
}
sortingDone = true
default:
return nil, fmt.Errorf("unknown qualifier \"%s\"", t.qualifier)
}
case tokenKindKVV:
switch t.qualifier {
case "metadata":
q.Metadata = append(q.Metadata, StringPair{Key: t.subQualifier, Value: t.value})
default:
return nil, fmt.Errorf("unknown qualifier \"%s:%s\"", t.qualifier, t.subQualifier)
}
}
}
return q, nil
}
func parseSorting(q *Query, value string) error {
switch value {
// default ASC
case "id-desc":
q.OrderBy = OrderById
q.OrderDirection = OrderDescending
case "id", "id-asc":
q.OrderBy = OrderById
q.OrderDirection = OrderAscending
// default DESC
case "creation", "creation-desc":
q.OrderBy = OrderByCreation
q.OrderDirection = OrderDescending
case "creation-asc":
q.OrderBy = OrderByCreation
q.OrderDirection = OrderAscending
// default DESC
case "edit", "edit-desc":
q.OrderBy = OrderByEdit
q.OrderDirection = OrderDescending
case "edit-asc":
q.OrderBy = OrderByEdit
q.OrderDirection = OrderAscending
default:
return fmt.Errorf("unknown sorting %s", value)
}
return nil
}
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