forked from GitHub-Mirror/riotX-android
97 lines
3.3 KiB
Kotlin
97 lines
3.3 KiB
Kotlin
/*
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* Copyright 2019 New Vector Ltd
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package im.vector.matrix.android.api.pushrules
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import im.vector.matrix.android.api.session.events.model.Event
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import im.vector.matrix.android.internal.di.MoshiProvider
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import timber.log.Timber
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class EventMatchCondition(val key: String, val pattern: String) : Condition(Kind.event_match) {
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override fun isSatisfied(conditionResolver: ConditionResolver) : Boolean {
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return conditionResolver.resolveEventMatchCondition(this)
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}
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override fun technicalDescription(): String {
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return "'$key' Matches '$pattern'"
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}
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fun isSatisfied(event: Event): Boolean {
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//TODO encrypted events?
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val rawJson = MoshiProvider.providesMoshi().adapter(Event::class.java).toJsonValue(event) as? Map<*, *>
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?: return false
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val value = extractField(rawJson, key) ?: return false
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//Patterns with no special glob characters should be treated as having asterisks prepended
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// and appended when testing the condition.
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try {
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val modPattern = if (hasSpecialGlobChar(pattern)) simpleGlobToRegExp(pattern) else simpleGlobToRegExp("*$pattern*")
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val regex = Regex(modPattern, RegexOption.DOT_MATCHES_ALL)
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return regex.containsMatchIn(value)
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} catch (e: Throwable) {
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//e.g PatternSyntaxException
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Timber.e(e, "Failed to evaluate push condition")
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return false
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}
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}
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private fun extractField(jsonObject: Map<*, *>, fieldPath: String): String? {
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val fieldParts = fieldPath.split(".")
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if (fieldParts.isEmpty()) return null
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var jsonElement: Map<*, *> = jsonObject
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fieldParts.forEachIndexed { index, pathSegment ->
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if (index == fieldParts.lastIndex) {
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return jsonElement[pathSegment]?.toString()
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} else {
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val sub = jsonElement[pathSegment] ?: return null
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if (sub is Map<*, *>) {
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jsonElement = sub
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} else {
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return null
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}
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}
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}
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return null
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}
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companion object {
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private fun hasSpecialGlobChar(glob: String): Boolean {
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return glob.contains("*") || glob.contains("?")
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}
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//Very simple glob to regexp converter
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private fun simpleGlobToRegExp(glob: String): String {
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var out = ""//"^"
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for (i in 0 until glob.length) {
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val c = glob[i]
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when (c) {
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'*' -> out += ".*"
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'?' -> out += '.'.toString()
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'.' -> out += "\\."
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'\\' -> out += "\\\\"
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else -> out += c
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}
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}
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out += ""//'$'.toString()
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return out
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}
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}
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} |