Add comment creation, editing and deletion

This needed changes in showing an issue's comments, because we want to
make it easy to target a specific comment and therefore we need to show
the comment id.

If the user doesn't provide a comment id, we show a list of comments and
let the user chose the comment to edit/delete.

jiracli/cli.py

@@ -466,8 +466,68 @@ def show(client, issue):
     for i, comment in enumerate(issue.fields.comment.comments):
         if i != 0:
             print('')
-        print(f"  {comment.created} - {comment.author}")
+        print(f"  {comment.created} - {comment.author} - {comment.id}")
         body = indent('\n'.join(wrap(comment.body, replace_whitespace=False)), ' ' * 4)
         print(body)
 
     print('')
+
+
+@issue.group()
+def comment():
+    pass
+
+
+@comment.command('create')
+@pass_issue
+@pass_client
+def comment_create(client, issue):
+    """Create a comment on the issue"""
+    # TODO add some help text for the syntax in the description
+    # TODO add all issue info to the description, so we can autocomplete in the
+    # editor
+    text = prompt(f"Comment text to add as new comment to {issue.key}")
+    client.add_comment(issue.key, text)
+
+
+def get_comment(client, issue, comment_id):
+    if not comment_id:
+        from clintermission import cli_select_item
+        options = []
+        for comment in issue.fields.comment.comments:
+            # TODO make this roughly terminal width or add a shorten() method
+            # with … at the end
+            body = comment.body.replace('\n', ' ')[:64]
+            options.append((f"{comment.created} - {comment.author} - {body}", comment.id))
+        _, comment_id = cli_select_item(options)
+
+    return client.comment(issue.key, comment_id, expand=['body'])
+
+
+@comment.command('edit')
+@click.argument('comment_id', required=False)
+@pass_issue
+@pass_client
+def comment_edit(client, issue, comment_id):
+    """Edit the text of an issues comment"""
+    comment = get_comment(client, issue, comment_id)
+
+    text = prompt(f"Comment text to set as new body for comment {comment_id} on {issue.key}",
+                  initial_content=comment.body)
+    if text == comment.body:
+        print("No changes. Aborting.")
+        return
+
+    comment.update(body=text)
+
+
+@comment.command('delete')
+@click.argument('comment_id', required=False)
+@pass_issue
+@pass_client
+def comment_delete(client, issue, comment_id):
+    comment = get_comment(client, issue, comment_id)
+
+    # TODO print formatted comment for verification
+    click.confirm("Do you really want to delete this ^ ?", abort=True)
+    comment.delete()

setup.cfg

@@ -7,6 +7,7 @@ description = JIRA command line interface
 packages = find:
 install_requires =
 	click
+	clintermission
 	python-editor
 	jira
 	pyaml