feat: arbitrary emails on server side and dynamic message configs

[dword-design]

I think I have come up with a solution that might fit for most users. The idea is similar to the one I sketched out above. What you basically do when sending emails from the client is to define message configs and then calling those configs with parameters. It's similar to the template system in EmailJS. This way you can define your emails in a flexible way without risking security leaks. The definition as a plain object is still the safest way to do it because nuxt-mail will filter out the risky fields. When setting a message config to a function, the developer is responsible to only pass the right fields through.

Here is an example of how message configs look like:

// nuxt.config.js

export default {
  modules: [
    ['nuxt-mail', {
      configs: {
        contact: {
          from: 'admin@foo.de',
          to: 'admin@foo.de',
        },
        issues: { /* ... */ },
        custom: ({ replyTo, text }) => ({
          from: 'admin@foo.de',
          to: 'admin@foo.de',
          replyTo,
          text,
        }),
      },
      smtp: { /* ... */ },
    }],
  ],
}

Then send the email like so:

this.$mail.send('contact', {
  replyTo: this.email,
  text: this.text,
})

On the server side, you have full freedom now. this.$mail.send behaves different depending on if it is on the client or the server, so for more complex logic, you can run $mail.send from the application context.

I've implemented the proposal in this pull request. Before deploying it I'd like to get your opinion on it since it has some breaking changes and there are many use cases to cover. You can find the more detailed explanation in the updated readme in the PR. To test the PR, check out the branch locally and run yarn --frozen-lockfile && yarn prepublishOnly. Then add it to some project via yarn add ../nuxt-mail.

Alright thanks for waiting, looking forward to your feedback!

[codecov[bot]]

Codecov Report

Merging #112 (1fb9901) into master (1e1539c) will decrease coverage by 14.68%. The diff coverage is 70.00%.

@@             Coverage Diff             @@
##           master     #112       +/-   ##
===========================================
- Coverage   86.11%   71.42%   -14.69%     
===========================================
  Files           2        4        +2     
  Lines          36       56       +20     
===========================================
+ Hits           31       40        +9     
- Misses          5       16       +11     

Impacted Files	Coverage Δ
src/plugin.client.js	0.00% <0.00%> (ø)
src/plugin.server.js	0.00% <0.00%> (ø)
src/send.js	86.36% <86.36%> (ø)
src/index.js	100.00% <100.00%> (ø)

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[vencho-mdp]

Hi! Any updates on this? Any way we could help?

[vencho-mdp]

@dword-design How could we help in order to have it ASAP? BTW, thanks for the great module!