From 09a7e8c9d013f13a1aa1ef4e9b7f397647b79967 Mon Sep 17 00:00:00 2001
From: Martin Czygan <martin.czygan@gmail.com>
Date: Sun, 21 Mar 2021 01:17:38 +0100
Subject: initial import of skate

---
 skate/cmd/skate-from-unstructured/main.go | 88 +++++++++++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 skate/cmd/skate-from-unstructured/main.go

(limited to 'skate/cmd/skate-from-unstructured')

diff --git a/skate/cmd/skate-from-unstructured/main.go b/skate/cmd/skate-from-unstructured/main.go
new file mode 100644
index 0000000..bfd3f32
--- /dev/null
+++ b/skate/cmd/skate-from-unstructured/main.go
@@ -0,0 +1,88 @@
+// skate-from-unstructured tries to parse various pieces of information from an
+// unstrctured string.
+package main
+
+import (
+	"flag"
+	"log"
+	"os"
+	"regexp"
+	"runtime"
+	"strings"
+
+	jsoniter "github.com/json-iterator/go"
+	"git.archive.org/martin/cgraph/skate"
+	"git.archive.org/martin/cgraph/skate/parallel"
+)
+
+var (
+	numWorkers   = flag.Int("w", runtime.NumCPU(), "number of workers")
+	batchSize    = flag.Int("b", 100000, "batch size")
+	json         = jsoniter.ConfigCompatibleWithStandardLibrary
+	bytesNewline = []byte("\n")
+
+	PatDOI         = regexp.MustCompile(`10[.][0-9]{1,8}/[^ ]*[\w]`)
+	PatDOINoHyphen = regexp.MustCompile(`10[.][0-9]{1,8}/[^ -]*[\w]`)
+	PatArxivPDF    = regexp.MustCompile(`http://arxiv.org/pdf/([0-9]{4,4}[.][0-9]{1,8})(v[0-9]{1,2})?(.pdf)?`)
+	PatArxivAbs    = regexp.MustCompile(`http://arxiv.org/abs/([0-9]{4,4}[.][0-9]{1,8})(v[0-9]{1,2})?(.pdf)?`)
+)
+
+func main() {
+	pp := parallel.NewProcessor(os.Stdin, os.Stdout, func(p []byte) ([]byte, error) {
+		var ref skate.Ref
+		if err := json.Unmarshal(p, &ref); err != nil {
+			return nil, err
+		}
+		// TODO: ref
+		if err := parseUnstructured(&ref); err != nil {
+			return nil, err
+		}
+		b, err := json.Marshal(ref)
+		if err != nil {
+			return nil, err
+		}
+		b = append(b, bytesNewline...)
+		return b, nil
+	})
+	pp.NumWorkers = *numWorkers
+	pp.BatchSize = *batchSize
+	if err := pp.Run(); err != nil {
+		log.Fatal(err)
+	}
+}
+
+// parseUnstructured will in-place augment missing DOI, arxiv id and so on.
+func parseUnstructured(ref *skate.Ref) error {
+	uns := ref.Biblio.Unstructured
+	var (
+		v  string
+		vs []string
+	)
+	// Handle things like: 10.1111/j.1550-7408.1968.tb02138.x-BIB5|cit5,
+	// 10.1111/j.1558-5646.1997.tb02431.x-BIB0008|evo02431-cit-0008, ...
+	if strings.Contains(strings.ToLower(ref.Key), "-bib") && ref.Biblio.DOI == "" {
+		parts := strings.Split(strings.ToLower(ref.Key), "-bib")
+		ref.Biblio.DOI = parts[0]
+	}
+	// DOI
+	v = PatDOI.FindString(uns)
+	if v != "" && ref.Biblio.DOI == "" {
+		ref.Biblio.DOI = v
+	}
+	// DOI in Key
+	v = PatDOINoHyphen.FindString(ref.Key)
+	if v != "" && ref.Biblio.DOI == "" {
+		ref.Biblio.DOI = v
+	}
+	// Arxiv
+	vs = PatArxivPDF.FindStringSubmatch(uns)
+	if len(vs) != 0 && ref.Biblio.ArxivId == "" {
+		ref.Biblio.ArxivId = vs[1]
+	} else {
+		vs = PatArxivAbs.FindStringSubmatch(uns)
+		if len(vs) != 0 && ref.Biblio.ArxivId == "" {
+			ref.Biblio.ArxivId = vs[1]
+		}
+	}
+	return nil
+}
-- 
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