feat: Create starting point for hook processing

Resolves #78

src/main/java/org/eclipsefoundation/git/eca/model/SystemHook.java

+/*********************************************************************
+* Copyright (c) 2022 Eclipse Foundation.
+*
+* This program and the accompanying materials are made
+* available under the terms of the Eclipse Public License 2.0
+* which is available at https://www.eclipse.org/legal/epl-2.0/
+*
+* Author: Zachary Sabourin <zachary.sabourin@eclipse-foundation.org>
+*
+* SPDX-License-Identifier: EPL-2.0
+**********************************************************************/
+package org.eclipsefoundation.git.eca.model;
+
+import java.time.ZonedDateTime;
+import java.util.List;
+
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+import com.fasterxml.jackson.databind.annotation.JsonPOJOBuilder;
+import com.google.auto.value.AutoValue;
+
+@AutoValue
+@JsonDeserialize(builder = AutoValue_SystemHook.Builder.class)
+public abstract class SystemHook {
+
+    public abstract ZonedDateTime getCreatedAt();
+
+    public abstract ZonedDateTime getUpdatedAt();
+
+    public abstract String getEventName();
+
+    public abstract String getName();
+
+    public abstract String getOwnerEmail();
+
+    public abstract String getOwnerName();
+
+    public abstract List<Owner> getOwners();
+
+    public abstract String getPath();
+
+    public abstract String getPathWithNamespace();
+
+    public abstract Integer getProjectId();
+
+    public abstract String getProjectVisibility();
+
+    public static Builder builder() {
+        return new AutoValue_SystemHook.Builder();
+    }
+
+    @AutoValue.Builder
+    @JsonPOJOBuilder(withPrefix = "set")
+    public abstract static class Builder {
+        public abstract Builder setCreatedAt(ZonedDateTime created);
+
+        public abstract Builder setUpdatedAt(ZonedDateTime updated);
+
+        public abstract Builder setEventName(String eventName);
+
+        public abstract Builder setName(String name);
+
+        public abstract Builder setOwnerEmail(String ownerEmail);
+
+        public abstract Builder setOwnerName(String ownerName);
+
+        public abstract Builder setOwners(List<Owner> owners);
+
+        public abstract Builder setPath(String path);
+
+        public abstract Builder setPathWithNamespace(String path);
+
+        public abstract Builder setProjectId(Integer projectId);
+
+        public abstract Builder setProjectVisibility(String visibility);
+
+        public abstract SystemHook build();
+    }
+
+    @AutoValue
+    @JsonDeserialize(builder = AutoValue_SystemHook_Owner.Builder.class)
+    public abstract static class Owner {
+        public abstract String getName();
+
+        public abstract String getEmail();
+
+        public static Builder builder() {
+            return new AutoValue_SystemHook_Owner.Builder();
+        }
+
+        @AutoValue.Builder
+        @JsonPOJOBuilder(withPrefix = "set")
+        public abstract static class Builder {
+            public abstract Builder setName(String name);
+
+            public abstract Builder setEmail(String email);
+
+            public abstract Owner build();
+        }
+    }
+}

src/main/java/org/eclipsefoundation/git/eca/resource/WebhooksResource.java

+/*********************************************************************
+* Copyright (c) 2022 Eclipse Foundation.
+*
+* This program and the accompanying materials are made
+* available under the terms of the Eclipse Public License 2.0
+* which is available at https://www.eclipse.org/legal/epl-2.0/
+*
+* Author: Zachary Sabourin <zachary.sabourin@eclipse-foundation.org>
+*
+* SPDX-License-Identifier: EPL-2.0
+**********************************************************************/
+package org.eclipsefoundation.git.eca.resource;
+
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+import javax.inject.Inject;
+import javax.ws.rs.POST;
+import javax.ws.rs.Path;
+import javax.ws.rs.core.Response;
+
+import org.eclipsefoundation.git.eca.model.SystemHook;
+import org.eclipsefoundation.git.eca.service.SystemHookService;
+import org.jboss.resteasy.annotations.jaxrs.HeaderParam;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+@Path("/webhooks")
+public class WebhooksResource {
+    private static final Logger LOGGER = LoggerFactory.getLogger(WebhooksResource.class);
+
+    private static final ExecutorService EXECUTOR = Executors.newSingleThreadExecutor();
+
+    @Inject
+    ObjectMapper om;
+
+    @Inject
+    SystemHookService hookService;
+
+    @POST
+    @Path("/gitlab/system")
+    public Response processGitlabHook(@HeaderParam("X-Gitlab-Event") String eventHeader, String body) {
+
+        LOGGER.info("EVENT RECEIVED: {}", eventHeader);
+
+        if (!isValidHook(eventHeader, body, "project_create")) {
+            return Response.status(400).build();
+        }
+
+        EXECUTOR.submit(new Runnable() {
+            @Override
+            public void run() {
+                hookService.processProjectCreateHook(convertRequestBody(body));
+            }
+        });
+
+        return Response.ok().build();
+    }
+
+    private SystemHook convertRequestBody(String body) {
+        return null;
+    }
+
+    /**
+     * Validates that the hook header and body contain the required hook type.
+     * 
+     * @param eventHeader
+     * @param body
+     * @return
+     */
+    private boolean isValidHook(String eventHeader, String body, String hookType) {
+        try {
+            JsonNode eventName = om.readTree(body).get("event_name");
+
+            return eventHeader.equalsIgnoreCase(hookType)
+                    && eventName.textValue().equalsIgnoreCase(hookType);
+        } catch (JsonProcessingException e) {
+            throw new RuntimeException("Error processing request body", e);
+        }
+    }
+}

src/main/java/org/eclipsefoundation/git/eca/service/SystemHookService.java

+/*********************************************************************
+* Copyright (c) 2022 Eclipse Foundation.
+*
+* This program and the accompanying materials are made
+* available under the terms of the Eclipse Public License 2.0
+* which is available at https://www.eclipse.org/legal/epl-2.0/
+*
+* Author: Zachary Sabourin <zachary.sabourin@eclipse-foundation.org>
+*
+* SPDX-License-Identifier: EPL-2.0
+**********************************************************************/
+package org.eclipsefoundation.git.eca.service;
+
+import org.eclipsefoundation.git.eca.model.SystemHook;
+
+public interface SystemHookService {
+
+    void processProjectCreateHook(SystemHook hook);
+}

src/main/java/org/eclipsefoundation/git/eca/service/impl/DefaultSystemHookService.java

+/*********************************************************************
+* Copyright (c) 2022 Eclipse Foundation.
+*
+* This program and the accompanying materials are made
+* available under the terms of the Eclipse Public License 2.0
+* which is available at https://www.eclipse.org/legal/epl-2.0/
+*
+* Author: Zachary Sabourin <zachary.sabourin@eclipse-foundation.org>
+*
+* SPDX-License-Identifier: EPL-2.0
+**********************************************************************/
+package org.eclipsefoundation.git.eca.service.impl;
+
+import org.eclipsefoundation.git.eca.model.SystemHook;
+import org.eclipsefoundation.git.eca.service.SystemHookService;
+
+public class DefaultSystemHookService implements SystemHookService {
+
+    @Override
+    public void processProjectCreateHook(SystemHook hook) {
+        // TODO Auto-generated method stub
+
+    }
+
+}