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require "json"
require "./handler"
module Guff
module APIMethods
API = {
"post": {
"get_posts": {
text: "Get posts matching query.",
args: {
"q": {
text: "Search string.",
type: :text,
required: false,
default: "",
},
"page": {
text: "Page number",
type: :int,
required: false,
default: "1",
},
"tags": {
text: "Comma-separated list of tags (union)",
type: :tags,
required: false,
default: "1",
},
"sort": {
text: "Sort order of results",
type: :sort,
required: false,
default: "date,desc",
},
},
},
},
"tag": {
"get_tags": {
text: "Get list of tags",
},
},
"test": {
"version": {
text: "Get version",
},
"get_posts": {
text: "Test get posts",
},
"error": {
text: "Test error response",
},
}
}
TYPE_CHECKS = {
text: /.*/,
int: /^\d+$/,
tags: /^[a-z0-9_,-]+$/,
sort: /^[a-z0-9_]+,(?:asc|desc)$/,
}
private def get_method_args(
params : HTTP::Params,
namespace : String,
method : String
)
return {} of String => String unless (
API[namespace]? &&
API[namespace][method] &&
API[namespace][method][:args]?
)
# get method args
args = API[namespace][method][:args] as \
Hash(String, Hash(Symbol, String | Symbol | Bool))
args.keys.reduce({} of String => String) do |r, arg_name|
arg_data = args[arg_name] as Hash(Symbol, String|Symbol|Bool)
# check for required parameter
if arg_data[:required] && !params.has_key?(arg_name)
raise "missing required parameter: %s" % [arg_name]
end
# get value
val = params.fetch(arg_name, arg_data[:default] as String)
# check value
if !TYPE_CHECKS[arg_data[:type]].match(val)
raise "invalid parameter format: %s" % [arg_name]
end
# add value to result
r[arg_name] = val
# return result
r
end
end
################
# post methods #
################
private def do_post_get_posts(
context : HTTP::Server::Context,
args : Hash(String, String)
)
[{foo: "bar"}, {foo: "asdf"}].to_json
end
###############
# tag methods #
###############
private def do_tag_get_tags(
context : HTTP::Server::Context,
args : Hash(String, String)
)
[{foo: "bar"}, {foo: "asdf"}].to_json
end
private def do_tag_remove_tags(
context : HTTP::Server::Context,
args : Hash(String, String)
)
true.to_json
end
################
# test methods #
################
private def do_test_version(
context : HTTP::Server::Context,
args : Hash(String, String)
)
{version: Guff::VERSION}.to_json
end
private def do_test_get_posts(
context : HTTP::Server::Context,
args : Hash(String, String)
)
[{foo: "bar"}, {foo: "asdf"}].to_json
end
private def do_test_error(
context : HTTP::Server::Context,
args : Hash(String, String)
)
raise "some random error"
end
end
end
|
