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Merge pull request #38 from jillesvangurp/geojsonio-support-and-impro…
…ve-geo-transformations geojsonio support and improve geo transformations
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59 changes: 59 additions & 0 deletions
59
src/commonMain/kotlin/com/jillesvangurp/geojson/json-helpers.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| package com.jillesvangurp.geojson | ||
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| import kotlinx.serialization.encodeToString | ||
| import kotlinx.serialization.json.Json | ||
|
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| val DEFAULT_JSON: Json by lazy { | ||
| Json { | ||
| // don't rely on external systems being written in kotlin or even having a language with default values | ||
| // the default of false is FFing insane and dangerous | ||
| encodeDefaults = true | ||
| // save space | ||
| prettyPrint = false | ||
| // people adding shit to the json is OK, we're forward compatible and will just ignore it | ||
| isLenient = true | ||
| // encoding nulls is meaningless and a waste of space. | ||
| explicitNulls = false | ||
| // adding enum values is OK even if older clients won't understand it | ||
| ignoreUnknownKeys = true | ||
| } | ||
| } | ||
|
|
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| val DEFAULT_JSON_PRETTY: Json by lazy { | ||
| Json { | ||
| // don't rely on external systems being written in kotlin or even having a language with default values | ||
| // the default of false is FFing insane and dangerous | ||
| encodeDefaults = true | ||
| // save space | ||
| prettyPrint = false | ||
| // people adding shit to the json is OK, we're forward compatible and will just ignore it | ||
| isLenient = true | ||
| // encoding nulls is meaningless and a waste of space. | ||
| explicitNulls = false | ||
| // adding enum values is OK even if older clients won't understand it | ||
| ignoreUnknownKeys = true | ||
| prettyPrint = true | ||
| } | ||
| } | ||
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|
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| val FeatureCollection.geoJsonIOUrl get() = DEFAULT_JSON.encodeToString(this).let { json-> | ||
| "https://geojson.io/#data=${"data:application/json,$json".urlEncode()}" | ||
| } | ||
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| val Geometry.geoJsonIOUrl get() = this.asFeatureCollection.geoJsonIOUrl | ||
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| fun String.urlEncode(): String { | ||
| val allowedChars = ('A'..'Z') + ('a'..'z') + ('0'..'9') + listOf('-', '.', '_', '~') | ||
| return buildString { | ||
| this@urlEncode.forEach { char -> | ||
| if (char in allowedChars) { | ||
| append(char) | ||
| } else { | ||
| append(char.toByte().toInt().let { | ||
| "%${it.shr(4).and(0xF).toString(16)}${it.and(0xF).toString(16)}" | ||
| }.toUpperCase()) | ||
| } | ||
| } | ||
| } | ||
| } |
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