fix: dynamic routes override non dynamic ones.

[erickzanardo]

Description

When declaring a dynamic route, they will always take precedence over a non dynamic on. For example, imagine that I have the following route:

GET /turtles/[id]

And the following:

POST /turtles/random

When calling curl -X POST http://localhost:8080/turtles/random, routes/turtles/[id]/index.dart will be called instead of routes/turtles/random.dart, which can be confusing.

Steps To Reproduce

1. clone https://github.com/erickzanardo/ninja_turtles_api
2. start the server
3. curl -X POST http://localhost:8080/turtles/random
4. See the 405 error

Expected Behavior

I understand that this can be considered an expected behaviour, one could argue that random is simply an id that the index.dart inside the /turtles/[id]/folder should consider and handle. Which I completely agree, but on the other hand,random.dartand[id]/index.dart` files are conflicting routes.

I believe there are two possible ways of fixing this:

• Non dynamic routes should take precedence over dynamic ones, so we could check for non dynamic route handlers before checking in dynamics ones, that way the example above would work. I believe this to be a preferred way of handling this, being able to split handlers like this can lead to a more organized route structure where we would be able to better split similar routes in different files.
• Identify these conflicts and give a warning to the user

[alestiago]

Linking a similar issue #631 for reference.