Add support for dpic.me

vripper-server/src/main/java/tn/mnlr/vripper/host/DPicMeHost.java

@@ -0,0 +1,85 @@
+package tn.mnlr.vripper.host;
+
+import lombok.extern.slf4j.Slf4j;
+import org.apache.http.client.protocol.HttpClientContext;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import org.w3c.dom.Document;
+import org.w3c.dom.Node;
+import tn.mnlr.vripper.exception.HostException;
+import tn.mnlr.vripper.exception.XpathException;
+import tn.mnlr.vripper.services.HostService;
+import tn.mnlr.vripper.services.XpathService;
+
+import java.util.Optional;
+import java.util.UUID;
+
+@Service
+@Slf4j
+public class DPicMeHost extends Host {
+
+  private static final String IMG_XPATH = "//img[@id='pic']";
+  private static final String host = "dpic.me";
+
+  private final HostService hostService;
+  private final XpathService xpathService;
+
+  @Autowired
+  public DPicMeHost(HostService hostService, XpathService xpathService) {
+    this.hostService = hostService;
+    this.xpathService = xpathService;
+  }
+
+  @Override
+  public String getHost() {
+    return host;
+  }
+
+  @Override
+  public String getLookup() {
+    return host;
+  }
+
+  @Override
+  public HostService.NameUrl getNameAndUrl(final String url, final HttpClientContext context)
+      throws HostException {
+
+    HostService.Response response =
+        hostService.getResponse(url.replace("http://", "https://"), context);
+    Document doc = response.getDocument();
+
+    Node imgNode;
+    try {
+      log.debug(String.format("Looking for xpath expression %s in %s", IMG_XPATH, url));
+      imgNode = xpathService.getAsNode(doc, IMG_XPATH);
+    } catch (XpathException e) {
+      throw new HostException(e);
+    }
+
+    if (imgNode == null) {
+      throw new HostException(String.format("Xpath '%s' cannot be found in '%s'", IMG_XPATH, url));
+    }
+
+    try {
+      log.debug(String.format("Resolving name and image url for %s", url));
+      String imgTitle =
+          Optional.ofNullable(imgNode.getAttributes().getNamedItem("alt"))
+              .map(e -> e.getTextContent().trim())
+              .orElse("");
+      String imgUrl =
+          Optional.ofNullable(imgNode.getAttributes().getNamedItem("src"))
+              .map(e -> e.getTextContent().trim())
+              .orElse("");
+      String defaultName = UUID.randomUUID().toString();
+
+      int index = imgUrl.lastIndexOf('/');
+      if (index != -1 && index < imgUrl.length()) {
+        defaultName = imgUrl.substring(imgUrl.lastIndexOf('/') + 1);
+      }
+
+      return new HostService.NameUrl(imgTitle.isEmpty() ? defaultName : imgTitle, imgUrl);
+    } catch (Exception e) {
+      throw new HostException("Unexpected error occurred", e);
+    }
+  }
+}