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annotate src/name/blackcap/exifwasher/Whitelist.kt @ 33:3d86f0391168

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Work on improving the build system.
author David Barts <davidb@stashtea.com>
date Fri, 24 Apr 2020 19:45:57 -0700
parents aafc9c127c7b
children
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1 /*
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2 * An exif key whitelist. Supports both prefixes and entire strings.
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3 */
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4 package name.blackcap.exifwasher
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5
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6 import java.util.regex.Pattern
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7 import kotlin.collections.mutableSetOf
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8 import kotlin.collections.mutableListOf
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10 class Whitelist: Cloneable {
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11 private val entire = mutableSetOf<String>()
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12 private val prefixes = mutableListOf<String>()
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14 fun addEntire(s: String) = entire.add(s)
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16 fun addPrefix(s: String) = prefixes.add(s)
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18 private fun autoOp(s: String, pfx: (String) -> Boolean, ent: (String) -> Boolean): Boolean {
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19 return if (s.endsWith('*')) { pfx(s.dropLast(1)) } else { ent(s) }
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20 }
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22 fun add(s: String) = autoOp(s, ::addPrefix, ::addEntire)
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24 fun removeEntire(s: String) = entire.remove(s)
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26 fun removePrefix(s: String) = prefixes.remove(s)
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28 fun remove(s: String) = autoOp(s, ::removePrefix, ::removeEntire)
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30 fun contains(s: String) = entire.contains(s) || prefixes.find { s.startsWith(it) } != null
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32 fun toList(): List<String> = prefixes.map { it + "*" } + entire
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34 override fun toString(): String = toList().joinToString(",")
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36 override public fun clone() = Whitelist().also { new ->
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37 entire.forEach { new.addEntire(it) }
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38 prefixes.forEach { new.addPrefix(it) }
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39 }
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41 companion object {
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42 private val SPLITTER = Pattern.compile(",\\s*")
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43 fun parse(raw: String) = Whitelist().also {
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44 for (s in raw.split(SPLITTER)) {
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45 it.add(s)
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46 }
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47 }
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48 }
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49 }