/
SaveCellularTrafficDisplayInterceptor.kt
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/
SaveCellularTrafficDisplayInterceptor.kt
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/*
* Copyright (C) 2022 panpf <panpfpanpf@outlook.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.github.panpf.sketch.request
import androidx.annotation.MainThread
import com.github.panpf.sketch.Sketch
import com.github.panpf.sketch.request.RequestInterceptor.Chain
import com.github.panpf.sketch.stateimage.ErrorStateImage
import com.github.panpf.sketch.stateimage.saveCellularTrafficError
/**
* To save cellular traffic. Prohibit downloading images from the Internet if the current network is cellular,
* Then can also cooperate with [saveCellularTrafficError] custom error image display
*
* @see DisplayRequest.Builder.saveCellularTraffic
* @see ErrorStateImage.Builder.saveCellularTrafficError
*/
class SaveCellularTrafficDisplayInterceptor constructor(
override val sortWeight: Int = 0,
isCellularNetworkConnected: ((Sketch) -> Boolean)? = null
) : RequestInterceptor {
override val key: String? = null
companion object {
private const val SAVE_CELLULAR_TRAFFIC_OLD_DEPTH_KEY =
"sketch#save_cellular_traffic_old_depth"
}
var enabled = true
private val isCellularNetworkConnected: (Sketch) -> Boolean =
isCellularNetworkConnected ?: { sketch ->
sketch.systemCallbacks.isCellularNetworkConnected
}
@MainThread
override suspend fun intercept(chain: Chain): Result<ImageData> {
val request = chain.request
val finalRequest = when {
request !is DisplayRequest -> {
request
}
enabled && request.isSaveCellularTraffic
&& !request.isIgnoredSaveCellularTraffic
&& isCellularNetworkConnected(chain.sketch) -> {
if (request.depth != Depth.LOCAL) {
val oldDepth = request.depth
request.newDisplayRequest {
depth(Depth.LOCAL, SAVE_CELLULAR_TRAFFIC_KEY)
setParameter(SAVE_CELLULAR_TRAFFIC_OLD_DEPTH_KEY, oldDepth.name, null)
}
} else {
request
}
}
else -> {
val oldDepth =
request.parameters?.value<String>(SAVE_CELLULAR_TRAFFIC_OLD_DEPTH_KEY)?.let {
try {
Depth.valueOf(it)
} catch (e: Exception) {
e.toString()
null
}
}
if (oldDepth != null && request.depth != oldDepth) {
request.newDisplayRequest {
depth(oldDepth)
removeParameter(SAVE_CELLULAR_TRAFFIC_OLD_DEPTH_KEY)
}
} else {
request
}
}
}
return chain.proceed(finalRequest)
}
override fun equals(other: Any?): Boolean {
if (this === other) return true
if (javaClass != other?.javaClass) return false
other as SaveCellularTrafficDisplayInterceptor
if (sortWeight != other.sortWeight) return false
return true
}
override fun hashCode(): Int {
return sortWeight
}
override fun toString(): String =
"SaveCellularTrafficDisplayInterceptor(sortWeight=$sortWeight,enabled=$enabled)"
}