Update README and Makefile (#2)

## Describe your changes
Added missing information to README and a missing command to the
`Makefile`.

## Checklist before requesting a review
- [x] The code runs successfully.

```console
michaelp@MacBook-Air-18 golang-scripting % ls
LICENSE		Makefile	README.md	cmd		go.mod		go.sum
michaelp@MacBook-Air-18 golang-scripting % make parse-slack-data
go run ./cmd/slackMessageParser/main.go
2024/07/16 00:08:50 the ./SlackMessages directory does not exist
exit status 1
make: *** [parse-slack-data] Error 1
michaelp@MacBook-Air-18 golang-scripting % mkdir -p ./SlackMessages
michaelp@MacBook-Air-18 golang-scripting % make parse-slack-data
go run ./cmd/slackMessageParser/main.go
2024/07/16 00:11:16 could not find *.json files in the ./SlackMessages directory
exit status 1
michaelp@MacBook-Air-18 golang-scripting % cp ~/Downloads/Archive/* ./SlackMessages
michaelp@MacBook-Air-18 golang-scripting % make parse-slack-data
go run ./cmd/slackMessageParser/main.go
michaelp@MacBook-Air-18 golang-scripting % ls
LICENSE			Makefile		README.md		SlackMessages		cmd			go.mod			go.sum			slack_records.csv
michaelp@MacBook-Air-18 golang-scripting %
```

Author: michplunkett

.gitignore

@@ -21,6 +21,10 @@
 go.work
 go.work.sum
 
+# Command directories
+SlackMessages
+slack_records.csv
+
 # IDE directories and misc. files
 .idea
 .vscode

Makefile

@@ -10,3 +10,7 @@ lint:
 	go fmt ./...
 	go vet ./...
 	staticcheck ./...
+
+.PHONY: parse-slack-data
+parse-slack-data:
+	go run ./cmd/slackMessageParser/main.go

README.md

@@ -4,10 +4,19 @@ Various scripts written in Golang.
 ## Scripts
 
 ### Slack Message Parser
+This tool is used to parse the `json`-formatted data that comes from [exporting Slack workspace data](https://slack.com/help/articles/201658943-Export-your-workspace-data) into a `csv` file named: `slack_records.csv`.
 
+`csv` format:
+TimeStamp,UserID,UserName,RealName,MessageType,Text,Attachments,Files
+
+| TimeStamp | UserID | UserName | RealName | MessageType |  Text  | Attachments |  Files   |
+|:---------:|:------:|:--------:|:--------:|:-----------:|:------:|:-----------:|:--------:|
+|  string   | string |  string  |  string  |   string    | string |  []string   | []string |
 
 #### Instructions
-```console
-cp [YOUR_ARCHIVE_PATH_HERE]/*.json ./SlackMessages/
-go run slack_message_parser.go
-```
+1. Move your files to the `SlackMessages` directory.
+    ```console
+    mkdir -p ./SlackMessages
+    cp [SLACK_WORKSPACE_DATA_PATH_HERE]/*.json ./SlackMessages/
+    ```
+2. Run the Slack message parser using the command: `make parse-slack-data`.

cmd/slackMessageParser/main.go

@@ -74,11 +74,11 @@ type CSVRecord struct {
 }
 
 func main() {
-	if _, err := os.Stat("../../SlackMessages"); os.IsNotExist(err) {
+	if _, err := os.Stat("./SlackMessages"); os.IsNotExist(err) {
 		log.Fatal("the ./SlackMessages directory does not exist")
 	}
 
-	files, err := filepath.Glob("../../SlackMessages/*.json")
+	files, err := filepath.Glob("./SlackMessages/*.json")
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -156,7 +156,7 @@ func main() {
 		csvRecords = append(csvRecords, record)
 	}
 
-	csvFile, err := os.Create("../../slack_records.csv")
+	csvFile, err := os.Create("slack_records.csv")
 	if err != nil {
 		log.Fatal(err)
 	}