Add support for multiline review comments (#1833)

* Add support for multi-line review comments

On review comments or during the creation of a new review, support single and multi-line
comments using `line` and `start_line` attributes.

See: https://docs.github.com/en/rest/pulls/comments?apiVersion=2022-11-28#create-a-review-comment-for-a-pull-request
and https://docs.github.com/en/rest/pulls/reviews?apiVersion=2022-11-28#create-a-review-for-a-pull-request

* Add tests for multi-line review comments

* Fix tests for multi-line comments on pull requests

* Add builder to create review comments

* Improve PR review comments implementation

* Update src/main/java/org/kohsuke/github/GHPullRequestReviewCommentBuilder.java

* Update src/main/java/org/kohsuke/github/GHPullRequestReviewCommentBuilder.java

* Update src/main/java/org/kohsuke/github/GHPullRequestReviewCommentBuilder.java

* Fix code formatting

* Update src/test/java/org/kohsuke/github/GHPullRequestTest.java

* Update src/test/java/org/kohsuke/github/GHPullRequestTest.java

---------

Co-authored-by: Maxime Wiewiora <maxime.wiewiora@neofacto.com>
Co-authored-by: Liam Newman <bitwiseman@gmail.com>

pom.xml

@@ -190,7 +190,6 @@
                       <exclude>org.kohsuke.github.GHCompare.User</exclude>
 
                       <!-- TODO: Some coverage, but more needed -->
-                      <exclude>org.kohsuke.github.GHPullRequestReviewBuilder.DraftReviewComment</exclude>
                       <exclude>org.kohsuke.github.GHIssue.PullRequest</exclude>
                       <exclude>org.kohsuke.github.GHCommitSearchBuilder</exclude>
                       <exclude>org.kohsuke.github.GHRepositorySearchBuilder</exclude>

src/main/java/org/kohsuke/github/GHPullRequest.java

@@ -522,6 +522,15 @@ public GHPullRequestReviewBuilder createReview() {
         return new GHPullRequestReviewBuilder(this);
     }
 
+    /**
+     * Create gh pull request review comment builder.
+     *
+     * @return the gh pull request review comment builder.
+     */
+    public GHPullRequestReviewCommentBuilder createReviewComment() {
+        return new GHPullRequestReviewCommentBuilder(this);
+    }
+
     /**
      * Create review comment gh pull request review comment.
      *
@@ -536,18 +545,12 @@ public GHPullRequestReviewBuilder createReview() {
      * @return the gh pull request review comment
      * @throws IOException
      *             the io exception
+     * @deprecated use {@link #createReviewComment()}
      */
+    @Deprecated
     public GHPullRequestReviewComment createReviewComment(String body, String sha, String path, int position)
             throws IOException {
-        return root().createRequest()
-                .method("POST")
-                .with("body", body)
-                .with("commit_id", sha)
-                .with("path", path)
-                .with("position", position)
-                .withUrlPath(getApiRoute() + COMMENTS_ACTION)
-                .fetch(GHPullRequestReviewComment.class)
-                .wrapUp(this);
+        return createReviewComment().body(body).commitId(sha).path(path).position(position).create();
     }
 
     /**

src/main/java/org/kohsuke/github/GHPullRequestReviewBuilder.java

@@ -14,7 +14,7 @@
 public class GHPullRequestReviewBuilder {
     private final GHPullRequest pr;
     private final Requester builder;
-    private final List<DraftReviewComment> comments = new ArrayList<DraftReviewComment>();
+    private final List<ReviewComment> comments = new ArrayList<>();
 
     /**
      * Instantiates a new GH pull request review builder.
@@ -75,19 +75,53 @@ public GHPullRequestReviewBuilder event(GHPullRequestReviewEvent event) {
      * Comment gh pull request review builder.
      *
      * @param body
-     *            The relative path to the file that necessitates a review comment.
+     *            Text of the review comment.
      * @param path
+     *            The relative path to the file that necessitates a review comment.
+     * @param position
      *            The position in the diff where you want to add a review comment. Note this value is not the same as
      *            the line number in the file. For help finding the position value, read the note below.
-     * @param position
-     *            Text of the review comment.
      * @return the gh pull request review builder
      */
     public GHPullRequestReviewBuilder comment(String body, String path, int position) {
         comments.add(new DraftReviewComment(body, path, position));
         return this;
     }
 
+    /**
+     * Add a multi-line comment to the gh pull request review builder.
+     *
+     * @param body
+     *            Text of the review comment.
+     * @param path
+     *            The relative path to the file that necessitates a review comment.
+     * @param startLine
+     *            The first line in the pull request diff that the multi-line comment applies to.
+     * @param endLine
+     *            The last line of the range that the comment applies to.
+     * @return the gh pull request review builder
+     */
+    public GHPullRequestReviewBuilder multiLineComment(String body, String path, int startLine, int endLine) {
+        this.comments.add(new MultilineDraftReviewComment(body, path, startLine, endLine));
+        return this;
+    }
+
+    /**
+     * Add a single line comment to the gh pull request review builder.
+     *
+     * @param body
+     *            Text of the review comment.
+     * @param path
+     *            The relative path to the file that necessitates a review comment.
+     * @param line
+     *            The line of the blob in the pull request diff that the comment applies to.
+     * @return the gh pull request review builder
+     */
+    public GHPullRequestReviewBuilder singleLineComment(String body, String path, int line) {
+        this.comments.add(new SingleLineDraftReviewComment(body, path, line));
+        return this;
+    }
+
     /**
      * Create gh pull request review.
      *
@@ -103,7 +137,29 @@ public GHPullRequestReview create() throws IOException {
                 .wrapUp(pr);
     }
 
-    private static class DraftReviewComment {
+    /**
+     * Common properties of the review comments, regardless of how the comment is positioned on the gh pull request.
+     */
+    private interface ReviewComment {
+        /**
+         * Gets body.
+         *
+         * @return the body.
+         */
+        String getBody();
+
+        /**
+         * Gets path.
+         *
+         * @return the path.
+         */
+        String getPath();
+    }
+
+    /**
+     * Single line comment using the relative position in the diff.
+     */
+    static class DraftReviewComment implements ReviewComment {
         private String body;
         private String path;
         private int position;
@@ -114,20 +170,10 @@ private static class DraftReviewComment {
             this.position = position;
         }
 
-        /**
-         * Gets body.
-         *
-         * @return the body
-         */
         public String getBody() {
             return body;
         }
 
-        /**
-         * Gets path.
-         *
-         * @return the path
-         */
         public String getPath() {
             return path;
         }
@@ -141,4 +187,79 @@ public int getPosition() {
             return position;
         }
     }
+
+    /**
+     * Multi-line comment.
+     */
+    static class MultilineDraftReviewComment implements ReviewComment {
+        private final String body;
+        private final String path;
+        private final int line;
+        private final int start_line;
+
+        MultilineDraftReviewComment(final String body, final String path, final int startLine, final int line) {
+            this.body = body;
+            this.path = path;
+            this.line = line;
+            this.start_line = startLine;
+        }
+
+        public String getBody() {
+            return this.body;
+        }
+
+        public String getPath() {
+            return this.path;
+        }
+
+        /**
+         * Gets end line of the comment.
+         *
+         * @return the end line of the comment.
+         */
+        public int getLine() {
+            return line;
+        }
+
+        /**
+         * Gets start line of the comment.
+         *
+         * @return the start line of the comment.
+         */
+        public int getStartLine() {
+            return start_line;
+        }
+    }
+
+    /**
+     * Single line comment.
+     */
+    static class SingleLineDraftReviewComment implements ReviewComment {
+        private final String body;
+        private final String path;
+        private final int line;
+
+        SingleLineDraftReviewComment(final String body, final String path, final int line) {
+            this.body = body;
+            this.path = path;
+            this.line = line;
+        }
+
+        public String getBody() {
+            return this.body;
+        }
+
+        public String getPath() {
+            return this.path;
+        }
+
+        /**
+         * Gets line of the comment.
+         *
+         * @return the line of the comment.
+         */
+        public int getLine() {
+            return line;
+        }
+    }
 }

src/main/java/org/kohsuke/github/GHPullRequestReviewCommentBuilder.java

@@ -0,0 +1,127 @@
+package org.kohsuke.github;
+
+import java.io.IOException;
+
+// TODO: Auto-generated Javadoc
+
+/**
+ * Builds up a creation of new {@link GHPullRequestReviewComment}.
+ *
+ * @see GHPullRequest#createReviewComment()
+ */
+public class GHPullRequestReviewCommentBuilder {
+    private final GHPullRequest pr;
+    private final Requester builder;
+
+    /**
+     * Instantiates a new GH pull request review comment builder.
+     *
+     * @param pr
+     *            the pr
+     */
+    GHPullRequestReviewCommentBuilder(GHPullRequest pr) {
+        this.pr = pr;
+        this.builder = pr.root().createRequest();
+    }
+
+    /**
+     * The SHA of the commit that needs a review. Not using the latest commit SHA may render your review comment
+     * outdated if a subsequent commit modifies the line you specify as the position. Defaults to the most recent commit
+     * in the pull request when you do not specify a value.
+     *
+     * @param commitId
+     *            the commit id
+     * @return the gh pull request review comment builder
+     */
+    public GHPullRequestReviewCommentBuilder commitId(String commitId) {
+        builder.with("commit_id", commitId);
+        return this;
+    }
+
+    /**
+     * The text of the pull request review comment.
+     *
+     * @param body
+     *            the body
+     * @return the gh pull request review comment builder
+     */
+    public GHPullRequestReviewCommentBuilder body(String body) {
+        builder.with("body", body);
+        return this;
+    }
+
+    /**
+     * The relative path to the file that necessitates a comment.
+     *
+     * @param path
+     *            the path
+     * @return the gh pull request review comment builder
+     */
+    public GHPullRequestReviewCommentBuilder path(String path) {
+        builder.with("path", path);
+        return this;
+    }
+
+    /**
+     * The position in the diff where you want to add a review comment.
+     *
+     * @param position
+     *            the position
+     * @return the gh pull request review comment builder
+     * @implNote As position is deprecated in GitHub API, only keep this for internal usage (for retro-compatibility
+     *           with {@link GHPullRequest#createReviewComment(String, String, String, int)}).
+     */
+    GHPullRequestReviewCommentBuilder position(int position) {
+        builder.with("position", position);
+        return this;
+    }
+
+    /**
+     * A single line of the blob in the pull request diff that the comment applies to.
+     * <p>
+     * {@link #line(int)} and {@link #lines(int, int)} will overwrite each other's values.
+     * </p>
+     *
+     * @param line
+     *            the line number
+     * @return the gh pull request review comment builder
+     */
+    public GHPullRequestReviewCommentBuilder line(int line) {
+        builder.with("line", line);
+        builder.remove("start_line");
+        return this;
+    }
+
+    /**
+     * The range of lines in the pull request diff that this comment applies to.
+     * <p>
+     * {@link #line(int)} and {@link #lines(int, int)} will overwrite each other's values.
+     * </p>
+     *
+     * @param startLine
+     *            the start line number of the comment
+     * @param endLine
+     *            the end line number of the comment
+     * @return the gh pull request review comment builder
+     */
+    public GHPullRequestReviewCommentBuilder lines(int startLine, int endLine) {
+        builder.with("start_line", startLine);
+        builder.with("line", endLine);
+        return this;
+    }
+
+    /**
+     * Create gh pull request review comment.
+     *
+     * @return the gh pull request review comment builder
+     * @throws IOException
+     *             the io exception
+     */
+    public GHPullRequestReviewComment create() throws IOException {
+        return builder.method("POST")
+                .withUrlPath(pr.getApiRoute() + "/comments")
+                .fetch(GHPullRequestReviewComment.class)
+                .wrapUp(pr);
+    }
+
+}