chore: Utils class added

Author: mrasif

imagekit-sdk/src/main/java/io/imagekit/sdk/utils/Utils.java

@@ -0,0 +1,85 @@
+package io.imagekit.sdk.utils;
+
+import io.imagekit.sdk.config.Configuration;
+
+import java.io.*;
+import java.net.URL;
+import java.util.Base64;
+import java.util.List;
+import java.util.Properties;
+
+public class Utils {
+
+    public static String listToString(List<String> list){
+        StringBuilder builder=new StringBuilder();
+        for (int i=0; i<list.size(); i++){
+            if (null!=list.get(i)) {
+                builder.append(list.get(i));
+                if (i < list.size() - 1) {
+                    builder.append(",");
+                }
+            }
+        }
+        return builder.toString();
+    }
+
+    public static String fileToBase64(File file){
+        String base64File = "";
+        try (FileInputStream imageInFile = new FileInputStream(file)) {
+            // Reading a file from file system
+            byte fileData[] = new byte[(int) file.length()];
+            imageInFile.read(fileData);
+            base64File = Base64.getEncoder().encodeToString(fileData);
+        } catch (FileNotFoundException e) {
+            System.out.println("File not found" + e);
+        } catch (IOException ioe) {
+            System.out.println("Exception while reading the file " + ioe);
+        }
+        return base64File;
+    }
+
+    public static byte[] fileToBytes(File file) {
+        byte[] bytes=null;
+        try (FileInputStream imageInFile = new FileInputStream(file)) {
+            // Reading a file from file system
+            bytes = new byte[(int) file.length()];
+            imageInFile.read(bytes);
+        } catch (FileNotFoundException e) {
+            System.out.println("File not found" + e);
+        } catch (IOException ioe) {
+            System.out.println("Exception while reading the file " + ioe);
+        }
+        return bytes;
+    }
+
+    public static String bytesToBase64(byte[] fileData){
+        String base64File = "";
+        base64File = Base64.getEncoder().encodeToString(fileData);
+        return base64File;
+    }
+
+    /**
+     *
+     * @param cls is a Class name from which this method will invoke
+     * @return it will return object of Configuration class
+     * @throws IOException if config.properties file doesn't exists
+     */
+    public static Configuration getSystemConfig(Class<?> cls) throws IOException{
+        Properties properties=new Properties();
+        String configFile="config.properties";
+        InputStream is=cls.getClassLoader().getResourceAsStream(configFile);
+        if (null!=is){
+            properties.load(is);
+        }
+        else {
+            throw new FileNotFoundException("Property file '"+configFile+"' not found in classpath");
+        }
+        Configuration config=new Configuration();
+        config.setUrlEndpoint(properties.getProperty("UrlEndpoint"));
+        config.setPublicKey(properties.getProperty("PublicKey"));
+        config.setPrivateKey(properties.getProperty("PrivateKey"));
+        config.validate();
+        return config;
+    }
+
+}