Feature: Allow Custom Approval or Denial Words (#66)

* Add support for custom approval and denial words

* Work out some regex nuances with GitHub

.gitignore

@@ -1 +1,2 @@
 .env
+.idea/

README.md

@@ -34,13 +34,22 @@ steps:
       issue-title: "Deploying v1.3.5 to prod from staging"
       issue-body: "Please approve or deny the deployment of version v1.3.5."
       exclude-workflow-initiator-as-approver: false
+      additional-approved-words: ''
+      additional-denied-words: ''
 ```
 
 - `approvers` is a comma-delimited list of all required approvers. An approver can either be a user or an org team. (*Note: Required approvers must have the ability to be set as approvers in the repository. If you add an approver that doesn't have this permission then you would receive an HTTP/402 Validation Failed error when running this action*)
 - `minimum-approvals` is an integer that sets the minimum number of approvals required to progress the workflow. Defaults to ALL approvers.
 - `issue-title` is a string that will be appended to the title of the issue.
 - `issue-body` is a string that will be prepended to the body of the issue.
 - `exclude-workflow-initiator-as-approver` is a boolean that indicates if the workflow initiator (determined by the `GITHUB_ACTOR` environment variable) should be filtered from the final list of approvers. This is optional and defaults to `false`. Set this to `true` to prevent users in the `approvers` list from being able to self-approve workflows.
+- `additional-approved-words` is a comma separated list of strings to expand the dictionary of words that indicate approval. This is optional and defaults to an empty string.
+- `additional-denied-words` is a comma separated list of strings to expand the dictionary of words that indicate denial. This is optional and defaults to an empty string.
+
+### Using Custom Words
+
+GitHub has a rich library of emojis, and these all work in additional approved words or denied words.  Some values GitHub will store in their text version - i.e. `:shipit:`. Other emojis, GitHub will store in their unicode emoji form, like ✅.
+For a seamless experience, it is recommended that you add the custom words to a GitHub comment, and then copy it back out of the comment into your actions configuration yaml.
 
 ## Org team approver
 

action.yaml

@@ -22,6 +22,12 @@ inputs:
   exclude-workflow-initiator-as-approver:
     description: Whether or not to filter out the user who initiated the workflow as an approver if they are in the approvers list
     default: false
+  additional-approved-words:
+    description: Comma separated list of words that can be used to approve beyond the defaults.
+    default: ''
+  additional-denied-words:
+    description: Comma separated list of words that can be used to deny beyond the defaults.
+    default: ''
 runs:
   using: docker
   image: docker://ghcr.io/trstringer/manual-approval:1.8.0

approval.go

@@ -145,10 +145,14 @@ func approversIndex(approvers []string, name string) int {
 
 func isApproved(commentBody string) (bool, error) {
 	for _, approvedWord := range approvedWords {
-		matched, err := regexp.MatchString(fmt.Sprintf("(?i)^%s[.!]*\n*$", approvedWord), commentBody)
+		re, err := regexp.Compile(fmt.Sprintf("(?i)^%s[.!]*\n*\\s*$", approvedWord))
 		if err != nil {
+			fmt.Printf("Error parsing. %v", err)
 			return false, err
 		}
+
+		matched := re.MatchString(commentBody)
+
 		if matched {
 			return true, nil
 		}
@@ -159,10 +163,12 @@ func isApproved(commentBody string) (bool, error) {
 
 func isDenied(commentBody string) (bool, error) {
 	for _, deniedWord := range deniedWords {
-		matched, err := regexp.MatchString(fmt.Sprintf("(?i)^%s[.!]*\n*$", deniedWord), commentBody)
+		re, err := regexp.Compile(fmt.Sprintf("(?i)^%s[.!]*\n*\\s*$", deniedWord))
 		if err != nil {
+			fmt.Printf("Error parsing. %v", err)
 			return false, err
 		}
+		matched := re.MatchString(commentBody)
 		if matched {
 			return true, nil
 		}