Add back `ProvidersXmlDiscovery` (c049cdd6) · Commits · e / os / Mail

legacy/ui/legacy/src/main/java/com/fsck/k9/activity/accountmanager/providersxml/ConnectionSettingsDiscovery.kt

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		package com.fsck.k9.activity.accountmanager.providersxml

		import com.fsck.k9.mail.AuthType
		import com.fsck.k9.mail.ConnectionSecurity

		interface ConnectionSettingsDiscovery {
		fun discover(email: String): DiscoveryResults?
		}

		data class DiscoveryResults(val incoming: List<DiscoveredServerSettings>, val outgoing: List<DiscoveredServerSettings>)

		data class DiscoveredServerSettings(
		val protocol: String,
		val host: String,
		val port: Int,
		val security: ConnectionSecurity,
		val authType: AuthType?,
		val username: String?,
		)

legacy/ui/legacy/src/main/java/com/fsck/k9/activity/accountmanager/providersxml/KoinModule.kt

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		package com.fsck.k9.activity.accountmanager.providersxml

		import org.koin.dsl.module

		val autodiscoveryProvidersXmlModule = module {
		factory { ProvidersXmlProvider(context = get()) }
		factory { ProvidersXmlDiscovery(xmlProvider = get(), oAuthConfigurationProvider = get()) }
		}

legacy/ui/legacy/src/main/java/com/fsck/k9/activity/accountmanager/providersxml/ProvidersXmlDiscovery.kt

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		package com.fsck.k9.activity.accountmanager.providersxml

		import android.content.res.XmlResourceParser
		import android.net.Uri
		import app.k9mail.core.common.mail.Protocols
		import app.k9mail.core.common.oauth.OAuthConfigurationProvider
		import com.fsck.k9.helper.EmailHelper
		import com.fsck.k9.mail.AuthType
		import com.fsck.k9.mail.ConnectionSecurity
		import org.xmlpull.v1.XmlPullParser
		import timber.log.Timber

		class ProvidersXmlDiscovery(
		private val xmlProvider: ProvidersXmlProvider,
		private val oAuthConfigurationProvider: OAuthConfigurationProvider,
		) : ConnectionSettingsDiscovery {

		override fun discover(email: String): DiscoveryResults? {
		val domain = EmailHelper.getDomainFromEmailAddress(email) ?: return null

		val provider = findProviderForDomain(domain) ?: return null

		val incomingSettings = provider.toIncomingServerSettings(email) ?: return null
		val outgoingSettings = provider.toOutgoingServerSettings(email) ?: return null
		return DiscoveryResults(listOf(incomingSettings), listOf(outgoingSettings))
		}

		private fun findProviderForDomain(domain: String): Provider? {
		return try {
		xmlProvider.getXml().use { xml ->
		parseProviders(xml, domain)
		}
		} catch (e: Exception) {
		Timber.e(e, "Error while trying to load provider settings.")
		null
		}
		}

		private fun parseProviders(xml: XmlResourceParser, domain: String): Provider? {
		do {
		val xmlEventType = xml.next()
		if (xmlEventType == XmlPullParser.START_TAG && xml.name == "provider") {
		val providerDomain = xml.getAttributeValue(null, "domain")
		if (domain.equals(providerDomain, ignoreCase = true)) {
		val provider = parseProvider(xml)
		if (provider != null) return provider
		}
		}
		} while (xmlEventType != XmlPullParser.END_DOCUMENT)

		return null
		}

		private fun parseProvider(xml: XmlResourceParser): Provider? {
		var incomingUriTemplate: String? = null
		var incomingUsernameTemplate: String? = null
		var outgoingUriTemplate: String? = null
		var outgoingUsernameTemplate: String? = null

		do {
		val xmlEventType = xml.next()
		if (xmlEventType == XmlPullParser.START_TAG) {
		when (xml.name) {
		"incoming" -> {
		incomingUriTemplate = xml.getAttributeValue(null, "uri")
		incomingUsernameTemplate = xml.getAttributeValue(null, "username")
		}
		"outgoing" -> {
		outgoingUriTemplate = xml.getAttributeValue(null, "uri")
		outgoingUsernameTemplate = xml.getAttributeValue(null, "username")
		}
		}
		}
		} while (!(xmlEventType == XmlPullParser.END_TAG && xml.name == "provider"))

		return if (incomingUriTemplate != null && incomingUsernameTemplate != null && outgoingUriTemplate != null &&
		outgoingUsernameTemplate != null
		) {
		Provider(incomingUriTemplate, incomingUsernameTemplate, outgoingUriTemplate, outgoingUsernameTemplate)
		} else {
		null
		}
		}

		private fun Provider.toIncomingServerSettings(email: String): DiscoveredServerSettings? {
		val user = EmailHelper.getLocalPartFromEmailAddress(email) ?: return null
		val domain = EmailHelper.getDomainFromEmailAddress(email) ?: return null

		val username = incomingUsernameTemplate.fillInUsernameTemplate(email, user, domain)

		val security = when {
		incomingUriTemplate.startsWith("imap+ssl") -> ConnectionSecurity.SSL_TLS_REQUIRED
		incomingUriTemplate.startsWith("imap+tls") -> ConnectionSecurity.STARTTLS_REQUIRED
		else -> error("Connection security required")
		}

		val uri = Uri.parse(incomingUriTemplate)
		val host = uri.host ?: error("Host name required")
		val port = if (uri.port == -1) {
		if (security == ConnectionSecurity.STARTTLS_REQUIRED) 143 else 993
		} else {
		uri.port
		}

		val authType = if (oAuthConfigurationProvider.getConfiguration(host) != null) {
		AuthType.XOAUTH2
		} else {
		AuthType.PLAIN
		}

		return DiscoveredServerSettings(Protocols.IMAP, host, port, security, authType, username)
		}

		private fun Provider.toOutgoingServerSettings(email: String): DiscoveredServerSettings? {
		val user = EmailHelper.getLocalPartFromEmailAddress(email) ?: return null
		val domain = EmailHelper.getDomainFromEmailAddress(email) ?: return null

		val username = outgoingUsernameTemplate.fillInUsernameTemplate(email, user, domain)

		val security = when {
		outgoingUriTemplate.startsWith("smtp+ssl") -> ConnectionSecurity.SSL_TLS_REQUIRED
		outgoingUriTemplate.startsWith("smtp+tls") -> ConnectionSecurity.STARTTLS_REQUIRED
		else -> error("Connection security required")
		}

		val uri = Uri.parse(outgoingUriTemplate)
		val host = uri.host ?: error("Host name required")
		val port = if (uri.port == -1) {
		if (security == ConnectionSecurity.STARTTLS_REQUIRED) 587 else 465
		} else {
		uri.port
		}

		val authType = if (oAuthConfigurationProvider.getConfiguration(host) != null) {
		AuthType.XOAUTH2
		} else {
		AuthType.PLAIN
		}

		return DiscoveredServerSettings(Protocols.SMTP, host, port, security, authType, username)
		}

		private fun String.fillInUsernameTemplate(email: String, user: String, domain: String): String {
		return this.replace("\$email", email).replace("\$user", user).replace("\$domain", domain)
		}

		internal data class Provider(
		val incomingUriTemplate: String,
		val incomingUsernameTemplate: String,
		val outgoingUriTemplate: String,
		val outgoingUsernameTemplate: String,
		)
		}

legacy/ui/legacy/src/main/java/com/fsck/k9/activity/accountmanager/providersxml/ProvidersXmlProvider.kt

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		package com.fsck.k9.activity.accountmanager.providersxml

		import android.content.Context
		import android.content.res.XmlResourceParser
		import com.fsck.k9.ui.R

		class ProvidersXmlProvider(private val context: Context) {
		fun getXml(): XmlResourceParser {
		return context.resources.getXml(R.xml.providers)
		}
		}

legacy/ui/legacy/src/main/res/xml/providers.xml

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File added.

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