somewhat overengineer API mocking

lib/mix/tasks/mock_api.ex

@@ -0,0 +1,52 @@
+defmodule Mix.Tasks.MockApi do
+  require Logger
+  use Mix.Task
+  @shortdoc "Refresh mock API responses"
+  @requirements ["app.start"]
+
+  @urls %{
+    stops_boyls:
+      {"/stops/place-boyls",
+       "include=parent_station%2Cfacilities%2Cchild_stops&fields%5Bfacility%5D=long_name%2Ctype%2Cproperties%2Clatitude%2Clongitude%2Cid&fields%5Bstop%5D=address%2Cname%2Clatitude%2Clongitude%2Caddress%2Cmunicipality%2Cwheelchair_boarding%2Clocation_type%2Cplatform_name%2Cplatform_code%2Cdescription"},
+    routes_boyls: {"/routes/", "stop=place-boyls&include=route_patterns"}
+  }
+
+  def run(_) do
+    test_data_dir = Application.app_dir(:mobile_app_backend, ["priv", "test-data"])
+    File.mkdir_p!(test_data_dir)
+
+    url_paths =
+      for {name, {path, query}} <- @urls do
+        data = get!(path, query)
+
+        filename = "#{name}.json"
+
+        Path.join(test_data_dir, filename)
+        |> File.write!(data)
+
+        %{path => %{query => filename}}
+      end
+      |> Enum.reduce(fn m1, m2 -> Map.merge(m1, m2, fn _k, v1, v2 -> Map.merge(v1, v2) end) end)
+
+    Path.join(test_data_dir, "meta.json")
+    |> File.write!(Jason.encode_to_iodata!(url_paths, pretty: true))
+  end
+
+  defp get!(path, query) do
+    base_url = Application.fetch_env!(:mobile_app_backend, :base_url)
+    api_key = Application.fetch_env!(:mobile_app_backend, :api_key)
+
+    url =
+      URI.new!(base_url) |> URI.append_path(path) |> URI.append_query(query) |> URI.to_string()
+
+    Logger.info("Downloading #{url}")
+
+    %HTTPoison.Response{body: body, status_code: 200} =
+      HTTPoison.get!(url, [
+        {"accept", "application/vnd.api+json"}
+        | MBTAV3API.Headers.build(api_key, use_cache?: false)
+      ])
+
+    body
+  end
+end

priv/test-data/meta.json

@@ -0,0 +1,8 @@
+{
+  "/routes/": {
+    "stop=place-boyls&include=route_patterns": "routes_boyls.json"
+  },
+  "/stops/place-boyls": {
+    "include=parent_station%2Cfacilities%2Cchild_stops&fields%5Bfacility%5D=long_name%2Ctype%2Cproperties%2Clatitude%2Clongitude%2Cid&fields%5Bstop%5D=address%2Cname%2Clatitude%2Clongitude%2Caddress%2Cmunicipality%2Cwheelchair_boarding%2Clocation_type%2Cplatform_name%2Cplatform_code%2Cdescription": "stops_boyls.json"
+  }
+}

priv/test-data/stops_boyls.json

@@ -0,0 +1 @@
+{"data":{"attributes":{"address":"Boylston St and Tremont St, Boston, MA","description":null,"latitude":42.35302,"location_type":1,"longitude":-71.06459,"municipality":"Boston","name":"Boylston","platform_code":null,"platform_name":null,"wheelchair_boarding":2},"id":"place-boyls","links":{"self":"/stops/place-boyls"},"relationships":{"child_stops":{"data":[{"id":"70158","type":"stop"},{"id":"70159","type":"stop"},{"id":"door-boyls-inbound","type":"stop"},{"id":"door-boyls-outbound","type":"stop"},{"id":"node-boyls-in-farepaid","type":"stop"},{"id":"node-boyls-in-fareunpaid","type":"stop"},{"id":"node-boyls-instair-platform","type":"stop"},{"id":"node-boyls-out-farepaid","type":"stop"},{"id":"node-boyls-out-fareunpaid","type":"stop"},{"id":"node-boyls-outstair-platform","type":"stop"}]},"facilities":{"data":[{"id":"fvm-201221","type":"facility"},{"id":"fvm-201222","type":"facility"},{"id":"fvm-201223","type":"facility"},{"id":"fvm-201224","type":"facility"},{"id":"fvm-202157","type":"facility"}],"links":{"related":"/facilities/?filter[stop]=place-boyls"}},"parent_station":{"data":null},"zone":{"data":null}},"type":"stop"},"included":[{"attributes":{"address":null,"description":"Boylston - Green Line - Park Street & North","latitude":42.352531,"location_type":0,"longitude":-71.064682,"municipality":"Boston","name":"Boylston","platform_code":null,"platform_name":"Park Street & North","wheelchair_boarding":2},"id":"70158","links":{"self":"/stops/70158"},"relationships":{"facilities":{"links":{"related":"/facilities/?filter[stop]=70158"}},"parent_station":{"data":{"id":"place-boyls","type":"stop"}},"zone":{"data":{"id":"RapidTransit","type":"zone"}}},"type":"stop"},{"attributes":{"address":null,"description":"Boylston - Green Line - Copley & West","latitude":42.353214,"location_type":0,"longitude":-71.064545,"municipality":"Boston","name":"Boylston","platform_code":null,"platform_name":"Copley & West","wheelchair_boarding":2},"id":"70159","links":{"self":"/stops/70159"},"relationships":{"facilities":{"links":{"related":"/facilities/?filter[stop]=70159"}},"parent_station":{"data":{"id":"place-boyls","type":"stop"}},"zone":{"data":{"id":"RapidTransit","type":"zone"}}},"type":"stop"},{"attributes":{"address":null,"description":"Boylston - Boston Common, Street","latitude":42.352531,"location_type":2,"longitude":-71.064685,"municipality":"Boston","name":"Boylston - Boston Common, Street","platform_code":null,"platform_name":null,"wheelchair_boarding":2},"id":"door-boyls-inbound","links":{"self":"/stops/door-boyls-inbound"},"relationships":{"facilities":{"links":{"related":"/facilities/?filter[stop]=door-boyls-inbound"}},"parent_station":{"data":{"id":"place-boyls","type":"stop"}},"zone":{"data":null}},"type":"stop"},{"attributes":{"address":null,"description":"Boylston - Boston Common, Street","latitude":42.353214,"location_type":2,"longitude":-71.064546,"municipality":"Boston","name":"Boylston - Boston Common, Street","platform_code":null,"platform_name":null,"wheelchair_boarding":2},"id":"door-boyls-outbound","links":{"self":"/stops/door-boyls-outbound"},"relationships":{"facilities":{"links":{"related":"/facilities/?filter[stop]=door-boyls-outbound"}},"parent_station":{"data":{"id":"place-boyls","type":"stop"}},"zone":{"data":null}},"type":"stop"},{"attributes":{"latitude":null,"long_name":"Boylston fare vending machine 201221","longitude":null,"properties":[{"name":"enclosed","value":1},{"name":"excludes-stop","value":"door-boyls-outbound"},{"name":"payment-form-accepted","value":"cash"},{"name":"payment-form-accepted","value":"credit-debit-card"}],"type":"FARE_VENDING_MACHINE"},"id":"fvm-201221","links":{"self":"/facilities/fvm-201221"},"relationships":{"stop":{"data":{"id":"place-boyls","type":"stop"}}},"type":"facility"},{"attributes":{"latitude":null,"long_name":"Boylston fare vending machine 201222","longitude":null,"properties":[{"name":"enclosed","value":1},{"name":"excludes-stop","value":"door-boyls-outbound"},{"name":"payment-form-accepted","value":"cash"},{"name":"payment-form-accepted","value":"credit-debit-card"}],"type":"FARE_VENDING_MACHINE"},"id":"fvm-201222","links":{"self":"/facilities/fvm-201222"},"relationships":{"stop":{"data":{"id":"place-boyls","type":"stop"}}},"type":"facility"},{"attributes":{"latitude":null,"long_name":"Boylston fare vending machine 201223","longitude":null,"properties":[{"name":"enclosed","value":1},{"name":"excludes-stop","value":"door-boyls-inbound"},{"name":"payment-form-accepted","value":"cash"},{"name":"payment-form-accepted","value":"credit-debit-card"}],"type":"FARE_VENDING_MACHINE"},"id":"fvm-201223","links":{"self":"/facilities/fvm-201223"},"relationships":{"stop":{"data":{"id":"place-boyls","type":"stop"}}},"type":"facility"},{"attributes":{"latitude":null,"long_name":"Boylston fare vending machine 201224","longitude":null,"properties":[{"name":"enclosed","value":1},{"name":"excludes-stop","value":"door-boyls-inbound"},{"name":"payment-form-accepted","value":"cash"},{"name":"payment-form-accepted","value":"credit-debit-card"}],"type":"FARE_VENDING_MACHINE"},"id":"fvm-201224","links":{"self":"/facilities/fvm-201224"},"relationships":{"stop":{"data":{"id":"place-boyls","type":"stop"}}},"type":"facility"},{"attributes":{"latitude":null,"long_name":"Boylston fare vending machine 202157","longitude":null,"properties":[{"name":"enclosed","value":1},{"name":"excludes-stop","value":"door-boyls-inbound"},{"name":"payment-form-accepted","value":"credit-debit-card"}],"type":"FARE_VENDING_MACHINE"},"id":"fvm-202157","links":{"self":"/facilities/fvm-202157"},"relationships":{"stop":{"data":{"id":"place-boyls","type":"stop"}}},"type":"facility"},{"attributes":{"address":null,"description":"Boylston - Paid side of fare gates","latitude":null,"location_type":3,"longitude":null,"municipality":"Boston","name":"Boylston","platform_code":null,"platform_name":null,"wheelchair_boarding":1},"id":"node-boyls-in-farepaid","links":{"self":"/stops/node-boyls-in-farepaid"},"relationships":{"facilities":{"links":{"related":"/facilities/?filter[stop]=node-boyls-in-farepaid"}},"parent_station":{"data":{"id":"place-boyls","type":"stop"}},"zone":{"data":null}},"type":"stop"},{"attributes":{"address":null,"description":"Boylston - Unpaid side of fare gates","latitude":null,"location_type":3,"longitude":null,"municipality":"Boston","name":"Boylston","platform_code":null,"platform_name":null,"wheelchair_boarding":1},"id":"node-boyls-in-fareunpaid","links":{"self":"/stops/node-boyls-in-fareunpaid"},"relationships":{"facilities":{"links":{"related":"/facilities/?filter[stop]=node-boyls-in-fareunpaid"}},"parent_station":{"data":{"id":"place-boyls","type":"stop"}},"zone":{"data":null}},"type":"stop"},{"attributes":{"address":null,"description":"Boylston - Bottom of Park Street & East stairs","latitude":null,"location_type":3,"longitude":null,"municipality":"Boston","name":"Boylston","platform_code":null,"platform_name":null,"wheelchair_boarding":1},"id":"node-boyls-instair-platform","links":{"self":"/stops/node-boyls-instair-platform"},"relationships":{"facilities":{"links":{"related":"/facilities/?filter[stop]=node-boyls-instair-platform"}},"parent_station":{"data":{"id":"place-boyls","type":"stop"}},"zone":{"data":null}},"type":"stop"},{"attributes":{"address":null,"description":"Boylston - Paid side of fare gates","latitude":null,"location_type":3,"longitude":null,"municipality":"Boston","name":"Boylston","platform_code":null,"platform_name":null,"wheelchair_boarding":1},"id":"node-boyls-out-farepaid","links":{"self":"/stops/node-boyls-out-farepaid"},"relationships":{"facilities":{"links":{"related":"/facilities/?filter[stop]=node-boyls-out-farepaid"}},"parent_station":{"data":{"id":"place-boyls","type":"stop"}},"zone":{"data":null}},"type":"stop"},{"attributes":{"address":null,"description":"Boylston - Unpaid side of fare gates","latitude":null,"location_type":3,"longitude":null,"municipality":"Boston","name":"Boylston","platform_code":null,"platform_name":null,"wheelchair_boarding":1},"id":"node-boyls-out-fareunpaid","links":{"self":"/stops/node-boyls-out-fareunpaid"},"relationships":{"facilities":{"links":{"related":"/facilities/?filter[stop]=node-boyls-out-fareunpaid"}},"parent_station":{"data":{"id":"place-boyls","type":"stop"}},"zone":{"data":null}},"type":"stop"},{"attributes":{"address":null,"description":"Boylston - Bottom of Copley & West stairs","latitude":null,"location_type":3,"longitude":null,"municipality":"Boston","name":"Boylston","platform_code":null,"platform_name":null,"wheelchair_boarding":1},"id":"node-boyls-outstair-platform","links":{"self":"/stops/node-boyls-outstair-platform"},"relationships":{"facilities":{"links":{"related":"/facilities/?filter[stop]=node-boyls-outstair-platform"}},"parent_station":{"data":{"id":"place-boyls","type":"stop"}},"zone":{"data":null}},"type":"stop"}],"jsonapi":{"version":"1.0"}}