Clean up conditional and set clear type

Author: khiga8

action.yml

@@ -14,26 +14,30 @@ runs:
             comment=$COMMENT
             issue=${{ github.event.issue.html_url }}
             comment_owner=${{ github.event.comment.user.login }}
-            is_pr=${{ github.event.issue.pull_request.url != '' }}
+            if ${{ github.event.issue.pull_request.url != '' }}; then
+              type=pr_comment
+            else
+              type=issue_comment
+            fi
             target=${{ github.event.comment.html_url }}
           elif [ ${{ github.event.issue && !github.event.comment }} ]; then
             comment=$ISSUE_BODY
             issue=${{ github.event.issue.html_url }}
             comment_owner=${{ github.event.issue.user.login }}
-            is_pr=false
+            type=issue_description
             target=" your issue body"
           elif [ ${{ github.event.pull_request && !github.event.comment }} ]; then
             comment=$PR_BODY
             issue=${{ github.event.pull_request.html_url }}
             comment_owner=${{ github.event.pull_request.user.login }}
-            is_pr=true
+            type=pr_description
             target=" your pull request body"
            elif [ ${{ github.event.discussion && !github.event.comment }} ]; then
-            comment='${{ github.event.discussion.body }}'
+            comment=$DISCUSSION_BODY
             discussion_node_id='${{ github.event.discussion.node_id }}'
             comment_owner=${{ github.event.discussion.user.login }}
-            target='your discussion description'
-            is_discussion=true
+            target='your discussion body'
+            type=discussion_description
           fi
           message="Uh oh! @$comment_owner, the image you shared is missing helpful alt text. Check $target.
 
@@ -42,9 +46,9 @@ runs:
           Learn more about alt text at [Basic writing and formatting syntax: images on GitHub Docs](https://docs.github.com/en/get-started/writing-on-github/getting-started-with-writing-and-formatting-on-github/basic-writing-and-formatting-syntax#images)."
           flag="$(flagAltText "$comment")"
           if [[ $flag = true ]]; then
-            if [[ $is_pr = true ]]; then
+            if [[ $type = pr_comment ]] || [[ $type = pr_description ]]; then
               gh pr comment $issue --body "$message"
-            elif [[ $is_discussion = true ]]; then
+            elif [[ $type = discussion_description ]]; then
               gh api graphql -F discussionId="$discussion_node_id" -F body="$message" -f query='
                 mutation($discussionId: ID!, $body: String!) {
                   addDiscussionComment(input: {discussionId: $discussionId, body: $body}) {
@@ -64,3 +68,4 @@ runs:
         COMMENT: ${{ github.event.comment.body }}
         ISSUE_BODY: ${{ github.event.issue.body }}
         PR_BODY: ${{ github.event.pull_request.body }}
+        DISCUSSION_BODY: ${{ github.event.discussion.body }}