Create, list, edit, delete subscriptions

[Letiste]

As a Rezoleo administrator,

I want to manage user's subscriptions,

So that I can add new subscriptions to users, edit their information, list the subscriptions of a user and delete wrong subscriptions.

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A subscription MUST have the following information:

• Owner
• Way of payment
• Price
• Duration
• Date

Constraints:

• Price MUST be 8€ per month or 80€ per year
• Duration of a subscription MUST be in month or in year
• Way of payment MUST be one of following : cash, cheque, credit card or bank transfer
• If a user is already subscribed, the new subscription MUST be effective at the end of the current subscription
• Subscription must be destroyed when owner is destroyed

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Definition of done:

• Model is validated against constraints
• Web UI to create, list, show, edit, delete subscriptions
• JSON API to create, list, show, edit, delete subscriptions
• Unit tests on model
• Tests on controller
• Integration tests on Web UI
• Integration tests on API