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(defpackage #:auth
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(:use #:cl
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#:hermetic
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#:sxql
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;; #:datafly
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#:ningle
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#:mito
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#:app-constants
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#:user)
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(:import-from #:ritherdon-archive.db
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#:connection-settings
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#:db
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#:with-connection)
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(:export #:csrf-token
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#:get-user-roles
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#:get-current-user
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#:flash-gethash
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#:auth-user-data))
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(in-package #:auth)
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(defun csrf-token ()
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"Cross-Site Request Forgery (CSRF) token."
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(cdr (assoc "lack.session"
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(lack.request:request-cookies ningle:*request*)
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:test #'string=)))
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(hermetic:setup
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;; #' is needed. (hermetic:roles) generates infinite-loop when called
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;; otherwise -- 'roles' called in other parts of code-base.
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;; #' is shorthand for the 'function' operator (returns the function
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;; object associated with the name of the function which is supplied
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;; as an argument. Keep forgetting that.
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:user-p #'(lambda (username)
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(with-connection (db)
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(mito:find-dao 'user::user :username username)))
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:user-pass #'(lambda (username)
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(user::password-of
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(with-connection (db)
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(mito:find-dao 'user::user :username username))))
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:user-roles #'(lambda (username)
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(cons :logged-in
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(let ((user (with-connection (db)
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(mito:find-dao
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'user::user :username username))))
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(and user
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(= (user::is-administrator-p user) +true+)
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'(:administrator)))))
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:session ningle:*session*
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:denied (constantly '(400 (:content-type "text/plain") ("Authentication denied"))))
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(defun get-current-user()
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"Returns the currently logged in user from the browser session."
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(with-connection (db)
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(mito:find-dao 'user :id (gethash :id ningle:*session*))))
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(defun auth-user-data ()
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"Get usual session data for logged in `USER'."
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`(:token ,(auth:csrf-token)
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:roles ,(auth:get-user-roles)
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:user ,(auth:get-current-user)))
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(defun get-user-roles()
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"Returns a list of roles the current user has assigned to them.
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This is mostly to check if the user is logged-in or has administration
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privileges. You can then create if-blocks in the HTML templates and
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control what the user can and cannot see or do."
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(loop :for role :in (hermetic:roles)
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:collect role
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:collect t))
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(defun flash-gethash (key table)
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"Clears out the session hash."
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(let ((value (gethash key table)))
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(remhash key table)
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value))
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