index.community/backend/lib/backend_web/controllers/search_controller.ex
2019-08-04 11:39:29 +00:00

53 lines
1.3 KiB
Elixir

defmodule BackendWeb.SearchController do
use BackendWeb, :controller
alias Backend.Api
action_fallback(BackendWeb.FallbackController)
def index(conn, params) do
query = Map.get(params, "query")
from = Map.get(params, "after", "0") |> String.to_integer()
# Filters
filter_keys =
params
|> Map.keys()
|> Enum.filter(fn key -> key !== "query" and key !== "after" end)
filters =
params
|> Map.take(filter_keys)
|> Map.to_list()
|> Enum.map(&convert_to_es_filter(&1))
%{hits: hits, next: next} = Api.search_instances(query, filters, from)
render(conn, "index.json", hits: hits, next: next)
end
defp convert_to_es_filter(url_param) do
{key, value} = url_param
# Key has the form e.g. "type_eq" or "user_count_gte"
key_components = String.split(key, "_")
# The field to filter on
field = Enum.take(key_components, length(key_components) - 1) |> Enum.join("_")
# The filter relation -- one of eq, gt, gte, lt, lte
relation = Enum.take(key_components, -1)
case field do
"type" ->
%{
"term" => %{"type" => value}
}
"user_count" ->
%{
"range" => %{
"user_count" => %{
relation => value
}
}
}
end
end
end