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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,119 +1,5 @@ | ||
| package arktekk.json | ||
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| import cats.data.NonEmptyList | ||
| import cats.parse.{Parser, Rfc5234} | ||
| import arktekk.ParserSuite | ||
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| import scala.util.Try | ||
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| class JsonParser extends ParserSuite { | ||
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| enum JsonValue { | ||
| case JsonNull | ||
| case JsonBoolean(value: Boolean) | ||
| case JsonNumber(value: BigDecimal) | ||
| case JsonString(value: String) | ||
| case JsonArray(values: List[JsonValue]) | ||
| case JsonObject(pairs: List[(String, JsonValue)]) | ||
| } | ||
| import JsonValue.* | ||
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| val ows = (Rfc5234.wsp | Rfc5234.crlf).rep0.void | ||
| val comma = Parser.char(',').surroundedBy(ows).withContext("comma") | ||
| val colon = Parser.char(':').surroundedBy(ows) | ||
| val openBracket = Parser.char('[').surroundedBy(ows) | ||
| val closeBracket = Parser.char(']').surroundedBy(ows).withContext("closeBracket") | ||
| val openBrace = Parser.char('{').surroundedBy(ows) | ||
| val closeBrace = Parser.char('}').surroundedBy(ows).withContext("closeBrace") | ||
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| val jsonNull: Parser[JsonValue] = Parser.string("null").as(JsonNull).withContext("null") | ||
| val jsonBoolean: Parser[JsonValue] = | ||
| (Parser | ||
| .string("false") | ||
| .as(JsonBoolean(false)) | Parser.string("true").as(JsonBoolean(true))).withContext("boolean") | ||
| val jsonNumber: Parser[JsonValue] = | ||
| cats.parse.Numbers.jsonNumber.mapFilter(s => Try(JsonNumber(BigDecimal(s))).toOption) | ||
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| val jsonStringParser: Parser[String] = cats.parse.strings.Json.delimited.parser | ||
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| val jsonString: Parser[JsonValue] = jsonStringParser.map(JsonString.apply) | ||
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| val jsonScalar: Parser[JsonValue] = jsonNull | jsonBoolean | jsonNumber | jsonString | ||
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| val jsonRecur: Parser[JsonValue] = Parser.defer { | ||
| val jsonValue = (jsonRecur | jsonScalar).surroundedBy(ows) | ||
| val jsonArray: Parser[JsonValue] = { | ||
| (openBracket ~ closeBracket).as(JsonArray(List.empty)).backtrack | | ||
| jsonValue | ||
| .repSep(comma) | ||
| .between(openBracket, closeBracket) | ||
| .map(nel => JsonArray(nel.toList)) | ||
| } | ||
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| val jsonObject: Parser[JsonValue] = { | ||
| (openBrace ~ closeBrace).as(JsonObject(List.empty)).backtrack | | ||
| ((jsonStringParser <* colon) ~ jsonValue) | ||
| .repSep(comma) | ||
| .between(openBrace, closeBrace) | ||
| .map((pairs: NonEmptyList[(String, JsonValue)]) => JsonObject(pairs.toList)) | ||
| } | ||
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| jsonArray | jsonObject | ||
| } | ||
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| val jsonValue: Parser[JsonValue] = jsonScalar | jsonRecur | ||
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| test("null") { | ||
| assertParses(jsonValue, "null" -> JsonNull) | ||
| } | ||
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| test("true/false") { | ||
| val validInputs = List( | ||
| "false" -> JsonBoolean(false), | ||
| "true" -> JsonBoolean(true) | ||
| ) | ||
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| assertParses(jsonValue, validInputs*) | ||
| } | ||
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| test("jsonNumber") { | ||
| val validInputs = List( | ||
| "123" -> JsonNumber(BigDecimal("123")), | ||
| "123.123" -> JsonNumber(123.123) | ||
| ) | ||
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| assertParses(jsonValue, validInputs*) | ||
| } | ||
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| test("jsonString") { | ||
| val validInputs = List( | ||
| "\"foo\"" -> JsonString("foo"), | ||
| "\"æøå\"" -> JsonString("æøå") | ||
| ) | ||
| assertParses(jsonValue, validInputs*) | ||
| } | ||
|
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| test("jsonArray") { | ||
| val validInputs = List( | ||
| " [ ] " -> JsonArray(List.empty), | ||
| "[ 1, 20 ]" -> JsonArray(List(JsonNumber(1), JsonNumber(20))) | ||
| ) | ||
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| assertParses(jsonValue, validInputs*) | ||
| } | ||
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| test("jsonObject") { | ||
| val validInputs = List( | ||
| "{ }" -> JsonObject(List.empty), | ||
| """{"test": 1}""" -> JsonObject(List("test" -> JsonNumber(BigDecimal(1)))), | ||
| """{"foo": "bar","fizz":[1,2,3,"fizz"]}""" -> JsonObject( | ||
| List( | ||
| ("foo", JsonString("bar")), | ||
| ("fizz", JsonArray(List(JsonNumber(1), JsonNumber(2), JsonNumber(3), JsonString("fizz")))) | ||
| ) | ||
| ) | ||
| ) | ||
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| assertParses(jsonValue, validInputs*) | ||
| } | ||
| } | ||
| class JsonParser extends ParserSuite {} |
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34 changes: 6 additions & 28 deletions
34
oppgaver/src/test/scala/arktekk/oppgave2/PointerParser.scala
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