Log Levels

let greeting = "Hello, Joe! 📞"

let multi_line_string = "one
two
three"

let name = "Mike"
"Hello, " <> name <> "!"
// -> "Hello, Mike!"

pub fn on_an_excellent_adventure(name: String) -> Bool {
  case name {
    "Bill" -> True
    "Ted" -> True
    _ -> False
  }
}

pub fn profession(name: String) -> String {
  case name {
    "Dr " <> rest -> rest <> " is a doctor"
    _ -> "I'm not sure what " <> name <> " does"
  }
}

Instructions

In this exercise you'll be processing log-lines.

Each log line is a string formatted as follows: "[<LEVEL>]: <MESSAGE>".

There are three different log levels:

• INFO
• WARNING
• ERROR

You have three tasks, each of which will take a log line and ask you to do something with it.

1. Get message from a log line

Implement the message function to return a log line's message:

message("[ERROR]: Invalid operation")
// -> "Invalid operation"

Any leading or trailing white space should be removed:

message("[WARNING]:  Disk almost full\r\n")
// -> "Disk almost full"

2. Get log level from a log line

Implement the log_level function to return a log line's log level, which should be returned in lowercase:

log_level("[ERROR]: Invalid operation")
// -> "error"

3. Reformat a log line

Implement the reformat function that reformats the log line, putting the message first and the log level after it in parentheses:

reformat("[INFO]: Operation completed")
// -> "Operation completed (info)"