[Koha-bugs] [Bug 16699] Swagger: Split parameters and paths, and specify required permissions for resource

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=16699

--- Comment #3 from Lari Taskula <larit at student.uef.fi> ---
Created attachment 52375
  -->
https://bugs.koha-community.org/bugzilla3/attachment.cgi?id=52375&action=edit
Bug 16699: Split parameters and paths in Swagger

Parameters and paths should be split in our Swagger specification, because
otherwise swagger.json would become messy with all the paths and their
further specification in the same file. Also parameters should be split
for the same reason.

Instead of using index.json for definitions, parameters and paths, we define
new files "definitions.json", "parameters.json" and "paths.json" in order to
simplify the references. If we kept using index.json and try to reference
"/definitions/error.json" from "/paths/holds.json", reference would be
"../definitions/index.json#/error" instead of now simplified version,
"../definitions.json#/error".

Here is the proposed structure:

.
├── swagger.json
├── definitions.json
├── paths.json
├── parameters.json
├── definitions
│   └── error.json
│   └── patron.json
├── parameters
│   └── patron.json
├── paths
│   └── patrons.json
├── minifySwagger.pl
└── swagger.min.js

The swagger.json paths, definitions and parameters will look as follows:
...
  "paths": {
    "$ref": "paths.json"
  },
  "definitions": {
    "$ref": "definitions.json"
  },
  "parameters": {
    "$ref": "parameters.json"
  }
...

A problem with splitting specification into multiple files directly from
swagger.json (e.g. "paths": { "$ref": "paths.json" }) is that it is not
following the Swagger specification and an error will be thrown by the
Swagger-UI default validator (online.swagger.io/validator).

To overcome this problem, we use the minifySwagger.pl script from Bug 16212.
This allows the developers to work with the structure introduced in this patch
thus allowing developers to split the specification nicely, and still have a
valid Swagger specification in the minified swagger.min.json.

To test:
-2: Apply the minifier-patch in Bug 16212.
-1: Make sure you can validate your specification with Swagger2 validator at
    online.swagger.io/validator/debug?url=url_to_swaggerjson, or install it
    locally from https://github.com/swagger-api/validator-badge.

1. Don't apply this patch yet, but first validate swagger.json
   with swagger.io-validator (or your local version, if you installed it)
2. Observe that validation errors are given
3. Run minifySwagger.pl
4. Validate swagger.min.json with the validator you used in step 1
5. Observe that validation passes and we overcame the invalid specification
   problem in swagger.min.json
6. Apply this patch
7. Run minifySwagger.pl
8. Repeat step 4
9. Observe that validation passes with new structure
10. Run REST tests at t/db_dependents/api/v1

(11. Study the new structure of our Swagger specifications :))

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