potential rewrite of matchprefixed

src/client/result/ISBNResultParser.rs

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2008 ZXing authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// package com.google.zxing.client.result;
+
+// import com.google.zxing.BarcodeFormat;
+// import com.google.zxing.RXingResult;
+
+use std::result;
+
+use crate::BarcodeFormat;
+
+use super::{RXingResultParser, ResultParser, ISBNParsedRXingResult, ParsedClientResult};
+
+/**
+ * Parses strings of digits that represent a ISBN.
+ * 
+ * @author jbreiden@google.com (Jeff Breidenbach)
+ */
+pub struct ISBNRXingResultParser  {}
+
+impl RXingResultParser for ISBNRXingResultParser {
+   /**
+   * See <a href="http://www.bisg.org/isbn-13/for.dummies.html">ISBN-13 For Dummies</a>
+   */
+  fn parse(&self, theRXingResult: &crate::RXingResult) -> Option<super::ParsedClientResult> {
+      let format = theRXingResult.getBarcodeFormat();
+      if *format != BarcodeFormat::EAN_13 {
+        return None;
+      }
+      let rawText = ResultParser::getMassagedText(theRXingResult);
+      let length = rawText.len();
+      if length != 13 {
+        return None;
+      }
+      if !rawText.starts_with("978") && !rawText.starts_with("979") {
+        return None;
+      }
+     
+      Some(ParsedClientResult::ISBNResult(ISBNParsedRXingResult::new(rawText)))
+    }
+}