# Classified
```elixir
Mix.install([
{:jason, "~> 1.4"},
{:kino, "~> 0.9", override: true},
{:youtube, github: "brooklinjazz/youtube"},
{:hidden_cell, github: "brooklinjazz/hidden_cell"}
])
```
## Navigation
[Return Home](../start.livemd)<span style="padding: 0 30px"></span>
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## Classified
You have been hired to hide confidential information in certain documents.
Confidential information should be replaced with `REDACTED`.
Confidential information includes:
* The words: `Peter Parker`, `Bruce Wayne`, `Clark Kent`.
* Any phone number in the format: `999-999-9999`.
* Any email in the format: `string@string.string`.
* Any four digit codes: i.e. `4444` or `1234`.
For example,
<!-- livebook:{"force_markdown":true} -->
```elixir
Classified.redact("Spiderman is Peter Parker.")
"Spiderman is REDACTED."
Classified.redact("Batman is Bruce Wayne.")
"Batman is REDACTED."
Classified.redact("Superman is Clark Kent.")
"Superman is REDACTED."
Classified.redact("Call 555-555-5555 for the secret info.")
"Call REDACTED for the secret info"
Classified.redact("Email super@secret.shh for the private data.")
"Email REDACTED for the private data."
Classified.redact("The password is 4525")
"The password is REDACTED"
```
Enter your solution below.
```elixir
defmodule Classified do
@doc ~S"""
Replaces confidential information with REDACTED in the given `string`.
## Examples
iex> Classified.redact("Spiderman is Peter Parker.")
"Spiderman is REDACTED."
iex> Classified.redact("Call 555-555-5555 for the secret info.")
"Call REDACTED for the secret info."
iex> Classified.redact("Email super@secret.ssh for the private data.")
"Email REDACTED for the private data."
iex> Classified.redact("The password is 4525.")
"The password is REDACTED."
"""
def redact(string) do
end
end
```
## Mark As Completed
<!-- livebook:{"attrs":{"source":"file_name = Path.basename(Regex.replace(~r/#.+/, __ENV__.file, \"\"), \".livemd\")\n\nprogress_path = __DIR__ <> \"/../progress.json\"\nexisting_progress = File.read!(progress_path) |> Jason.decode!()\n\ndefault = Map.get(existing_progress, file_name, false)\n\nform =\n Kino.Control.form(\n [\n completed: input = Kino.Input.checkbox(\"Mark As Completed\", default: default)\n ],\n report_changes: true\n )\n\nTask.async(fn ->\n for %{data: %{completed: completed}} <- Kino.Control.stream(form) do\n File.write!(progress_path, Jason.encode!(Map.put(existing_progress, file_name, completed)))\n end\nend)\n\nform","title":"Track Your Progress"},"chunks":null,"kind":"Elixir.HiddenCell","livebook_object":"smart_cell"} -->
```elixir
file_name = Path.basename(Regex.replace(~r/#.+/, __ENV__.file, ""), ".livemd")
progress_path = __DIR__ <> "/../progress.json"
existing_progress = File.read!(progress_path) |> Jason.decode!()
default = Map.get(existing_progress, file_name, false)
form =
Kino.Control.form(
[
completed: input = Kino.Input.checkbox("Mark As Completed", default: default)
],
report_changes: true
)
Task.async(fn ->
for %{data: %{completed: completed}} <- Kino.Control.stream(form) do
File.write!(progress_path, Jason.encode!(Map.put(existing_progress, file_name, completed)))
end
end)
form
```
## Commit Your Progress
Run the following in your command line from the curriculum folder to track and save your progress in a Git commit.
Ensure that you do not already have undesired or unrelated changes by running `git status` or by checking the source control tab in Visual Studio Code.
```
$ git checkout solutions
$ git checkout -b classified-exercise
$ git add .
$ git commit -m "finish classified exercise"
$ git push origin classified-exercise
```
Create a pull request from your `classified-exercise` branch to your `solutions` branch.
Please do not create a pull request to the DockYard Academy repository as this will spam our PR tracker.
**DockYard Academy Students Only:**
Notify your instructor by including `@BrooklinJazz` in your PR description to get feedback.
You (or your instructor) may merge your PR into your solutions branch after review.
If you are interested in joining the next academy cohort, [sign up here](https://academy.dockyard.com/) to receive more news when it is available.
