forked from go-kivik/couchdb
/
rows.go
142 lines (116 loc) · 2.65 KB
/
rows.go
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package couchdb
import (
"context"
"encoding/json"
"fmt"
"io"
"net/http"
"github.com/go-kivik/kivik"
"github.com/go-kivik/kivik/driver"
)
type rowsMeta struct {
offset int64
totalRows int64
updateSeq sequenceID
warning string
bookmark string
}
type rows struct {
*iter
*rowsMeta
}
var _ driver.Rows = &rows{}
type rowsMetaParser struct{}
func (p *rowsMetaParser) parseMeta(i interface{}, dec *json.Decoder, key string) error {
meta := i.(*rowsMeta)
return meta.parseMeta(key, dec)
}
type rowParser struct {
rowsMetaParser
}
var _ parser = &rowParser{}
func (p *rowParser) decodeItem(i interface{}, dec *json.Decoder) error {
return dec.Decode(i)
}
func newRows(ctx context.Context, in io.ReadCloser) driver.Rows {
meta := &rowsMeta{}
return &rows{
iter: newIter(ctx, meta, "rows", in, &rowParser{}),
rowsMeta: meta,
}
}
type findParser struct {
rowsMetaParser
}
var _ parser = &findParser{}
func (p *findParser) decodeItem(i interface{}, dec *json.Decoder) error {
row := i.(*driver.Row)
return dec.Decode(&row.Doc)
}
func newFindRows(ctx context.Context, in io.ReadCloser) driver.Rows {
meta := &rowsMeta{}
return &rows{
iter: newIter(ctx, meta, "docs", in, &findParser{}),
rowsMeta: meta,
}
}
type bulkParser struct {
rowsMetaParser
}
var _ parser = &bulkParser{}
func (p *bulkParser) decodeItem(i interface{}, dec *json.Decoder) error {
row := i.(*driver.Row)
var result bulkResult
if err := dec.Decode(&result); err != nil {
return err
}
row.ID = result.ID
row.Doc = result.Docs[0].Doc
row.Error = nil
if err := result.Docs[0].Error; err != nil {
row.Error = err
}
return nil
}
func newBulkGetRows(ctx context.Context, in io.ReadCloser) driver.Rows {
meta := &rowsMeta{}
return &rows{
iter: newIter(ctx, meta, "results", in, &bulkParser{}),
rowsMeta: meta,
}
}
func (r *rows) Offset() int64 {
return r.offset
}
func (r *rows) TotalRows() int64 {
return r.totalRows
}
func (r *rows) Warning() string {
return r.warning
}
func (r *rows) Bookmark() string {
return r.bookmark
}
func (r *rows) UpdateSeq() string {
return string(r.updateSeq)
}
func (r *rows) Next(row *driver.Row) error {
row.Error = nil
return r.iter.next(row)
}
// parseMeta parses result metadata
func (r *rowsMeta) parseMeta(key string, dec *json.Decoder) error {
switch key {
case "update_seq":
return dec.Decode(&r.updateSeq)
case "offset":
return dec.Decode(&r.offset)
case "total_rows":
return dec.Decode(&r.totalRows)
case "warning":
return dec.Decode(&r.warning)
case "bookmark":
return dec.Decode(&r.bookmark)
}
return &kivik.Error{HTTPStatus: http.StatusBadGateway, Err: fmt.Errorf("Unexpected key: %s", key)}
}