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First pass for Ecto -> Json API - WIP
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| defmodule JsonApi do | |
| def filter_struct(obj) do | |
| is_struct?(obj) or (is_list(obj) && is_struct?(Enum.at(obj,0))) | |
| end | |
| def is_struct?(obj) do | |
| is_map(obj) && Map.get(obj, :__struct__) != nil | |
| # ( obj.__struct__ == Ecto.Association.NotLoaded || | |
| end | |
| def json_api(obj) do | |
| if is_list(obj) do | |
| data = Enum.map(obj, &json_api_data(&1)) | |
| %{ data: data } | |
| else | |
| json_api_data(obj) | |
| end | |
| end | |
| def json_api_data(obj, filter \\ []) do | |
| # Go one level deep while splitting out the structs | |
| # If it's a struct, it should be under relationships and includes | |
| {structures, attributes} = | |
| Map.drop(obj, [:__meta__, :__struct__]) | |
| |> Enum.partition( fn{k,v} -> | |
| filter_struct(v) | |
| end) | |
| attributes = attributes |> Enum.into(%{}) | |
| # Parse the structures to give some relationships | |
| relationships = | |
| structures | |
| |> Enum.map( fn{k,v} -> | |
| if ! is_list(v), do: v = [v] | |
| data = Enum.reduce(v, [], fn(x, acc) -> | |
| id = Map.get(x,:id) | |
| if id, do: acc = acc ++ [%{"type": to_string(k), "id": id}] | |
| end) | |
| data | |
| end) | |
| |> List.flatten | |
| |> Enum.reject(&is_nil(&1)) | |
| # Ugly, but go over the included set from the structures one more time | |
| included = | |
| structures | |
| |> Enum.map( fn{k,v} -> | |
| if ! is_list(v), do: v = [v] | |
| data = Enum.reduce(v, [], fn(x, acc) -> | |
| id = Map.get(x,:id) | |
| # find everything that isn't a struct and put it into a map | |
| attributes= | |
| x | |
| |> Map.drop([:__meta__, :__struct__]) | |
| |> Enum.reject(fn{k,v} -> | |
| filter_struct(v) | |
| end) | |
| |> Enum.into(%{}) | |
| if id, do: acc = acc ++ [%{"type": x.__meta__.source, "id": id, "attributes": attributes}] | |
| end) | |
| data | |
| end) | |
| |> List.flatten | |
| |> Enum.reject(&is_nil(&1)) | |
| # Generate first level object | |
| %{ | |
| type: obj.__meta__.source, | |
| id: attributes[:id], | |
| attributes: attributes, | |
| links: %{ "self": "something" }, | |
| relationships: relationships, | |
| included: included | |
| } | |
| end | |
| end |
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