mirror of https://github.com/waku-org/nwaku.git
82 lines
2.5 KiB
Nim
82 lines
2.5 KiB
Nim
{.push raises: [Defect].}
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import std/typetraits
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import
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stew/results,
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chronicles,
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serialization,
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json_serialization,
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json_serialization/std/[options, net, sets],
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presto/common
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logScope: topics = "rest_api_serdes"
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Json.createFlavor RestJson
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template unrecognizedFieldWarning* =
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# TODO: There should be a different notification mechanism for informing the
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# caller of a deserialization routine for unexpected fields.
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# The chonicles import in this module should be removed.
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debug "JSON field not recognized by the current version of nwaku. Consider upgrading",
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fieldName, typeName = typetraits.name(typeof value)
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type SerdesResult*[T] = Result[T, cstring]
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proc decodeFromJsonString*[T](t: typedesc[T],
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data: JsonString,
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requireAllFields = true): SerdesResult[T] =
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try:
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ok(RestJson.decode(string(data), T,
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requireAllFields = requireAllFields,
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allowUnknownFields = true))
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except SerializationError:
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# TODO: Do better error reporting here
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err("Unable to deserialize data")
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proc decodeFromJsonBytes*[T](t: typedesc[T],
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data: openArray[byte],
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requireAllFields = true): SerdesResult[T] =
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try:
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ok(RestJson.decode(string.fromBytes(data), T,
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requireAllFields = requireAllFields,
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allowUnknownFields = true))
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except SerializationError:
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# TODO: Do better error reporting here
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err("Unable to deserialize data")
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proc encodeIntoJsonString*(value: auto): SerdesResult[string] =
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var encoded: string
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try:
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var stream = memoryOutput()
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var writer = JsonWriter[RestJson].init(stream)
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writer.writeValue(value)
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encoded = stream.getOutput(string)
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except SerializationError, IOError:
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# TODO: Do better error reporting here
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return err("unable to serialize data")
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ok(encoded)
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proc encodeIntoJsonBytes*(value: auto): SerdesResult[seq[byte]] =
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var encoded: seq[byte]
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try:
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var stream = memoryOutput()
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var writer = JsonWriter[RestJson].init(stream)
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writer.writeValue(value)
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encoded = stream.getOutput(seq[byte])
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except SerializationError, IOError:
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# TODO: Do better error reporting here
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return err("unable to serialize data")
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ok(encoded)
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#### helpers
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proc encodeString*(value: string): RestResult[string] =
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ok(value)
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proc decodeString*(t: typedesc[string], value: string): RestResult[string] =
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ok(value)
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