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// Generate CSV from Google Books queries.
// authors, title, publishedDate, publisher, ISBN-13, ISBN-10, URL
package main
import (
"bufio"
"encoding/json"
"errors"
"fmt"
"io"
"io/fs"
"log"
"os"
"strings"
)
func readFile(name string) []byte {
in, err := os.Open(name)
if err != nil {
log.Fatal(err)
}
defer in.Close()
body, err := io.ReadAll(in)
if err != nil {
log.Fatal(err)
}
return body
}
func write(writer *bufio.Writer, contents string) {
_, err := writer.Write([]byte(contents))
if err != nil {
log.Fatal(err)
}
}
/* Unnecessary complication.
Only one entry needs to be in memory at a time.
type Entry struct {
authors: string
title: string
publishedDate: string
isbn13: string
isbn10: string
url: string
}*/
func main() {
// Read a list of file names, named after google books queries
var fullTitle, authors, publishedDate, isbn13, isbn10, url string
for _, title := range strings.Split(string(readFile("list")), "\n") {
if (len(title) < 3) {
continue
}
fmt.Println(title)
// For each title, create csv file
var out *os.File
_, err := os.Stat(title + ".csv")
if errors.Is(err, fs.ErrNotExist) {
//log.Print(err)
out, err = os.Create(title + ".csv")
if err != nil {
log.Fatal(err)
}
} else if err != nil {
log.Fatal(err)
} else {
out, err = os.Open(title + ".csv")
if err != nil {
log.Fatal(err)
}
}
defer out.Close()
outWriter := bufio.NewWriter(out)
//outWriter := bufio.NewWriter(os.Stdout)
// Print CSV header
write(outWriter, "Title, Authors, Published Date, ISBN-13, ISBN-10, URL\n")
defer outWriter.Flush()
// In each provided file, JSON results
rawJson := readFile(title)
var data interface{}
// Parse the JSON into an associative array
json.Unmarshal(rawJson, &data)
// Get through the cruft
m := data.(map[string]interface{})
for _, subm := range m["items"].([]interface{}) {
switch subm.(type) {
case map[string]interface{}:
m := subm.(map[string]interface{})
m = m["volumeInfo"].(map[string]interface{})
isbns := m["industryIdentifiers"].([]interface{})
for _, v := range isbns {
isbn := v.(map[string]interface{})
isbnText := isbn["identifier"].(string)
// ISBN-10 is sometimes 9 digits, ISBN-13 is always 13 digits
if len(isbnText) == 13 {
isbn13 = isbnText
} else {
isbn10 = isbnText
}
}
if m["authors"] != nil {
authorsMap := m["authors"].([]interface{})
for i, author := range authorsMap {
authorText := author.(string)
if i > 0 {
authors += " & "
authors += authorText
} else {
authors = authorText
}
}
}
fullTitle = strings.Replace(m["title"].(string), ",", "", -1)
if m["publishedDate"] != nil {
publishedDate = m["publishedDate"].(string)
}
url = m["infoLink"].(string)
default:
}
write(outWriter, fmt.Sprintf("%s,%s,%s,%s,%s,%s\n", fullTitle, authors, publishedDate, isbn13, isbn10, url))
}
}
}
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