Created
January 15, 2019 10:18
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A simple method that reads a Map and returns a new map formatted as form data for https://pub.dartlang.org/packages/http
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| Map<String, String> mapNested(Map<String, dynamic> obj, [Map<String, String> current, String namespace]) { | |
| Map<String, String> res = current != null ? current : Map<String, String>(); | |
| for (String key in obj.keys) { | |
| String newKey = namespace != null ? '$namespace[$key]' : key; | |
| if (obj[key] is Map) { | |
| mapNested(obj[key], res, key); | |
| } else if (obj[key] is List) { | |
| for(int i = 0; i < obj[key].length; i++) { | |
| mapNested(obj[key][i], res, "$key[$i]"); | |
| } | |
| } else { | |
| res[newKey] = "${obj[key]}"; | |
| } | |
| } | |
| return res; | |
| } | |
| // Example | |
| print(mapToFormData({ | |
| "foo": "bar", | |
| "baz": [ | |
| { | |
| "xyz": 123, | |
| "wub": 456, | |
| }, | |
| { | |
| "xyz": 789, | |
| "wub": 012, | |
| }, | |
| ], | |
| "wat": { | |
| "rly": 0, | |
| "ya": 1, | |
| }, | |
| })); | |
| // should print | |
| /* | |
| { | |
| foo: bar, | |
| baz[0][xyz]: 123, | |
| baz[0][wub]: 456, | |
| baz[1][xyz]: 789, | |
| baz[1][wub]: 12, | |
| wat[rly]: 0, | |
| wat[ya]: 1 | |
| } | |
| */ |
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