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package skate
import (
"fmt"
"io"
"strings"
"git.archive.org/martin/cgraph/skate/zipkey"
json "github.com/segmentio/encoding/json"
)
// This file contains the two-stream (zippy) matchers.
// ZippyExact takes a release and refs reader (tsv, with ident, key, doc)
// and assigns a fixed match result.
func ZippyExact(releases, refs io.Reader, matchResult MatchResult, w io.Writer) error {
var (
enc = json.NewEncoder(w)
keyer = makeKeyFunc("\t", 1)
grouper = func(g *zipkey.Group) error {
var (
target *Release
ref *Ref
err error
)
if len(g.G0) == 0 || len(g.G1) == 0 {
return nil
}
if target, err = stringToRelease(cut(g.G0[0], "\t", 2)); err != nil {
return err
}
for _, line := range g.G1 {
if ref, err = stringToRef(cut(line, "\t", 2)); err != nil {
return err
}
var bref BiblioRef
bref.SourceReleaseIdent = ref.ReleaseIdent
bref.SourceWorkIdent = ref.WorkIdent
bref.SourceReleaseStage = ref.ReleaseStage
bref.SourceYear = fmt.Sprintf("%d", ref.ReleaseYear)
bref.RefIndex = ref.Index + 1 // we want 1-index (also helps with omitempty)
bref.RefKey = ref.Key
bref.TargetReleaseIdent = target.Ident
bref.TargetWorkIdent = target.WorkID
bref.MatchProvenance = ref.RefSource
bref.MatchStatus = matchResult.Status.Short()
bref.MatchReason = matchResult.Reason.Short()
if err := enc.Encode(bref); err != nil {
return err
}
}
return nil
}
)
zipper := zipkey.New(releases, refs, keyer, grouper)
return zipper.Run()
}
// ZippyExactWiki takes a release and wiki reader (tsv, with key, doc)
// and assigns a fixed match result.
func ZippyExactWiki(releases, wiki io.Reader, mr MatchResult, w io.Writer) error {
var (
enc = json.NewEncoder(w)
keyer = makeKeyFunc("\t", 1)
grouper = func(g *zipkey.Group) error {
var (
target *Release
wiki *MinimalCitations
err error
)
if len(g.G0) == 0 || len(g.G1) == 0 {
return nil
}
if target, err = stringToRelease(cut(g.G0[0], "\t", 2)); err != nil {
return err
}
for _, line := range g.G1 {
if wiki, err = stringToWiki(cut(line, "\t", 2)); err != nil {
return err
}
var bref BiblioRef
bref.Key = fmt.Sprintf("%s_%s", slugifyString(wiki.PageTitle), target.Ident) // XXX: what should we use?
bref.SourceWikipediaArticle = wiki.PageTitle
bref.TargetReleaseIdent = target.Ident
bref.TargetWorkIdent = target.WorkID
bref.MatchProvenance = "wikipedia"
bref.MatchStatus = mr.Status.Short()
bref.MatchReason = mr.Reason.Short()
if err := enc.Encode(bref); err != nil {
return err
}
}
return nil
}
)
zipper := zipkey.New(releases, wiki, keyer, grouper)
return zipper.Run()
}
// ZippyVerifyRefs takes a release and refs reader (tsv, with ident, key, doc)
// and will execute gf for each group found.
func ZippyVerifyRefs(releases, refs io.Reader, w io.Writer) error {
// Define a grouper, working on one set of refs and releases with the same
// key at a time. Here, we do verification and write out the generated
// biblioref.
var (
enc = json.NewEncoder(w)
keyer = makeKeyFunc("\t", 2)
grouper = func(g *zipkey.Group) error {
var (
re, pivot *Release
err error
)
if len(g.G0) == 0 || len(g.G1) == 0 {
return nil
}
if pivot, err = stringToRelease(cut(g.G0[0], "\t", 3)); err != nil {
return err
}
for _, line := range g.G1 {
if re, err = stringToRelease(cut(line, "\t", 3)); err != nil {
return err
}
result := Verify(pivot, re)
switch result.Status {
case StatusExact, StatusStrong:
if result.Reason == ReasonDOI {
continue
}
br := generateBiblioRef(re, pivot, result, "fuzzy")
if err := enc.Encode(br); err != nil {
return err
}
}
}
return nil
}
)
zipper := zipkey.New(releases, refs, keyer, grouper)
return zipper.Run()
}
// makeKeyFunc creates a function that can be used as keyFunc, selecting a
// column from fields separated by sep; column is 1-indexed.
func makeKeyFunc(sep string, column int) func(string) (string, error) {
return func(s string) (string, error) {
if k := cut(s, sep, column); k == "" {
return k, fmt.Errorf("cannot get key: %s", s)
} else {
return k, nil
}
}
}
// cut returns a specific column (1-indexed, like cut) from a tabular
// file, returns empty string if column is invalid.
func cut(line, sep string, column int) string {
parts := strings.Split(strings.TrimSpace(line), sep)
if len(parts) < column {
return ""
} else {
return parts[column-1]
}
}
func stringToRelease(s string) (r *Release, err error) {
err = json.Unmarshal([]byte(s), &r)
return
}
func stringToRef(s string) (r *Ref, err error) {
err = json.Unmarshal([]byte(s), &r)
return
}
func stringToWiki(s string) (r *MinimalCitations, err error) {
err = json.Unmarshal([]byte(s), &r)
return
}
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