85 lines
2.7 KiB
Crystal
85 lines
2.7 KiB
Crystal
# Mentorenwahl: A fullstack application for assigning mentors to students based on their whishes.
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# Copyright (C) 2022 Dominic Grimm
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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require "http/headers"
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require "baked_file_system"
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module Backend
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module Web
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module Controllers
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@[ARTA::Route(path: "/")]
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# GraphQL API controller
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class ApiController < ATH::Controller
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{% if flag?(:playground) %}
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# Public folder virtual filesystem
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private module Public
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extend BakedFileSystem
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bake_folder "../../../../public"
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end
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@[ARTA::Get("")]
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def playground : ATH::Response
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ATH::StreamedResponse.new(headers: HTTP::Headers{"Content-Type" => "text/html", "Access-Control-Allow-Origin" => "*"}) do |io|
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IO.copy(Public.get("index.html"), io)
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end
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end
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{% else %}
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@[ARTA::Get("")]
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def playground : ATH::Exceptions::ServiceUnavailable
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ATH::Exceptions::ServiceUnavailable.new("GraphQL playground is disabled")
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end
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{% end %}
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# GraphQL query data
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struct GraphQLQuery
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include JSON::Serializable
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# Raw query
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getter query : String
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# Variables
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getter variables = {} of String => JSON::Any
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# Operation name
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getter operation_name : String?
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end
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@[ARTA::Post("")]
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def endpoint(request : ATH::Request) : ATH::Exceptions::BadRequest | ATH::Response
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return ATH::Exceptions::BadRequest.new("No request body given") unless request.body
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query = GraphQLQuery.from_json(request.body.not_nil!)
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ATH::StreamedResponse.new(
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headers: HTTP::Headers{
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"content-type" => "application/json",
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"cache-control" => {"no-cache", "no-store", "max-age=0", "must-revalidate"},
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}
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) do |io|
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Api::Schema::SCHEMA.execute(
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io,
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query.query,
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query.variables,
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query.operation_name,
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Api::Context.new(request.headers)
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)
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end
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end
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end
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end
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end
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end
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