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| 1 | +package com.gravatar.quickeditor.ui.oauth |
| 2 | + |
| 3 | +import android.content.Context |
| 4 | +import android.content.Intent |
| 5 | +import android.net.Uri |
| 6 | +import android.os.Build |
| 7 | +import android.os.Build.VERSION.SDK_INT |
| 8 | +import android.os.Bundle |
| 9 | +import androidx.activity.result.contract.ActivityResultContract |
| 10 | +import androidx.appcompat.app.AppCompatActivity |
| 11 | +import androidx.browser.customtabs.CustomTabsIntent |
| 12 | +import com.gravatar.quickeditor.ui.GravatarQuickEditorActivity |
| 13 | +import com.gravatar.types.Email |
| 14 | +import java.net.URLDecoder |
| 15 | + |
| 16 | +/** |
| 17 | + * Activity to handle OAuth authentication with Gravatar. |
| 18 | + * |
| 19 | + * This activity launches a custom tab for the user to authenticate with Gravatar. |
| 20 | + * Once the authentication is complete, it retrieves the access token from the redirect URI |
| 21 | + * and returns it as a result. |
| 22 | + * |
| 23 | + * It's used internally, but it's exposed as a public as it needs to be declared in your AndroidManifest.xml file |
| 24 | + * with the proper deep linking setup. |
| 25 | + */ |
| 26 | +public class GravatarOAuthActivity : AppCompatActivity() { |
| 27 | + private var oAuthStarted = false |
| 28 | + private var clientId: String? = null |
| 29 | + private var redirectUri: String? = null |
| 30 | + private var email: String? = null |
| 31 | + |
| 32 | + override fun onCreate(savedInstanceState: Bundle?) { |
| 33 | + super.onCreate(savedInstanceState) |
| 34 | + if (SDK_INT >= Build.VERSION_CODES.UPSIDE_DOWN_CAKE) { |
| 35 | + overrideActivityTransition(OVERRIDE_TRANSITION_OPEN, 0, 0) |
| 36 | + } else { |
| 37 | + @Suppress("DEPRECATION") |
| 38 | + overridePendingTransition(0, 0) |
| 39 | + } |
| 40 | + |
| 41 | + oAuthStarted = savedInstanceState?.getBoolean(OAUTH_STARTED_KEY) ?: false |
| 42 | + |
| 43 | + clientId = intent.getStringExtra(CLIENT_ID_KEY) |
| 44 | + redirectUri = intent.getStringExtra(REDIRECT_URI_KEY) |
| 45 | + email = intent.getStringExtra(EMAIL_KEY) |
| 46 | + |
| 47 | + if (clientId == null || redirectUri == null || email == null) { |
| 48 | + setResult( |
| 49 | + RESULT_OK, |
| 50 | + Intent().apply { |
| 51 | + putExtra(ACTIVITY_RESULT, RESULT_CANCELED) |
| 52 | + }, |
| 53 | + ) |
| 54 | + finish() |
| 55 | + return |
| 56 | + } |
| 57 | + |
| 58 | + addOnNewIntentListener { newIntent -> |
| 59 | + val token = newIntent.data |
| 60 | + ?.encodedFragment |
| 61 | + ?.split("&") |
| 62 | + ?.associate { |
| 63 | + val split = it.split("=") |
| 64 | + split.first() to split.last() |
| 65 | + } |
| 66 | + ?.get("access_token") |
| 67 | + ?.let { URLDecoder.decode(it, "UTF-8") } |
| 68 | + |
| 69 | + if (token != null) { |
| 70 | + val resultIntent = Intent().apply { |
| 71 | + putExtra(ACTIVITY_RESULT, RESULT_TOKEN_RETRIEVED) |
| 72 | + putExtra(TOKEN_KEY, token) |
| 73 | + } |
| 74 | + |
| 75 | + setResult(RESULT_OK, resultIntent) |
| 76 | + } else { |
| 77 | + setResult( |
| 78 | + RESULT_OK, |
| 79 | + Intent().apply { |
| 80 | + putExtra(ACTIVITY_RESULT, RESULT_TOKEN_ERROR) |
| 81 | + }, |
| 82 | + ) |
| 83 | + } |
| 84 | + finish() |
| 85 | + } |
| 86 | + } |
| 87 | + |
| 88 | + override fun onSaveInstanceState(outState: Bundle) { |
| 89 | + super.onSaveInstanceState(outState) |
| 90 | + |
| 91 | + outState.putBoolean(OAUTH_STARTED_KEY, oAuthStarted) |
| 92 | + } |
| 93 | + |
| 94 | + override fun onResume() { |
| 95 | + super.onResume() |
| 96 | + |
| 97 | + if (!oAuthStarted) { |
| 98 | + launchCustomTab( |
| 99 | + this, |
| 100 | + clientId = clientId!!, |
| 101 | + redirectUri = redirectUri!!, |
| 102 | + email = Email(email!!), |
| 103 | + ) |
| 104 | + oAuthStarted = true |
| 105 | + } else { |
| 106 | + setResult( |
| 107 | + RESULT_OK, |
| 108 | + Intent().apply { |
| 109 | + putExtra(ACTIVITY_RESULT, RESULT_CANCELED) |
| 110 | + }, |
| 111 | + ) |
| 112 | + finish() |
| 113 | + } |
| 114 | + } |
| 115 | + |
| 116 | + private fun launchCustomTab(context: Context, clientId: String, redirectUri: String, email: Email) { |
| 117 | + val customTabIntent: CustomTabsIntent = CustomTabsIntent.Builder() |
| 118 | + .build() |
| 119 | + customTabIntent.launchUrl( |
| 120 | + context, |
| 121 | + Uri.parse(WordPressOauth.buildUrl(clientId, redirectUri, email)), |
| 122 | + ) |
| 123 | + } |
| 124 | + |
| 125 | + internal companion object { |
| 126 | + private const val CLIENT_ID_KEY = "client_id" |
| 127 | + private const val REDIRECT_URI_KEY = "redirect_uri" |
| 128 | + private const val EMAIL_KEY = "email" |
| 129 | + private const val OAUTH_STARTED_KEY = "oauth_started" |
| 130 | + internal const val TOKEN_KEY = "auth_token" |
| 131 | + |
| 132 | + internal const val ACTIVITY_RESULT: String = "oAuthActivityResult" |
| 133 | + internal const val RESULT_CANCELED: Int = 1000 |
| 134 | + internal const val RESULT_TOKEN_RETRIEVED: Int = 1001 |
| 135 | + internal const val RESULT_TOKEN_ERROR: Int = 1002 |
| 136 | + |
| 137 | + internal fun createIntent(context: Context, oAuthParams: OAuthParams, email: String): Intent { |
| 138 | + return Intent(context, GravatarOAuthActivity::class.java).apply { |
| 139 | + putExtra(CLIENT_ID_KEY, oAuthParams.clientId) |
| 140 | + putExtra(REDIRECT_URI_KEY, oAuthParams.redirectUri) |
| 141 | + putExtra(EMAIL_KEY, email) |
| 142 | + } |
| 143 | + } |
| 144 | + } |
| 145 | +} |
| 146 | + |
| 147 | +/** |
| 148 | + * Activity result contract to get the result from the [GravatarOAuthActivity]. |
| 149 | + * |
| 150 | + * @see GravatarOAuthActivityParams |
| 151 | + * @see GravatarOAuthResult |
| 152 | + */ |
| 153 | +internal class GravatarOAuthResultContract : |
| 154 | + ActivityResultContract<GravatarOAuthActivityParams, GravatarOAuthResult>() { |
| 155 | + override fun createIntent(context: Context, input: GravatarOAuthActivityParams): Intent { |
| 156 | + return GravatarOAuthActivity.createIntent( |
| 157 | + context = context, |
| 158 | + oAuthParams = input.oAuthParams, |
| 159 | + email = input.email, |
| 160 | + ) |
| 161 | + } |
| 162 | + |
| 163 | + override fun parseResult(resultCode: Int, intent: Intent?): GravatarOAuthResult { |
| 164 | + return when (intent?.getIntExtra(GravatarOAuthActivity.ACTIVITY_RESULT, -1)) { |
| 165 | + GravatarOAuthActivity.RESULT_TOKEN_RETRIEVED -> GravatarOAuthResult.TOKEN( |
| 166 | + intent.getStringExtra(GravatarOAuthActivity.TOKEN_KEY)!!, |
| 167 | + ) |
| 168 | + |
| 169 | + GravatarOAuthActivity.RESULT_TOKEN_ERROR -> GravatarOAuthResult.ERROR |
| 170 | + else -> GravatarOAuthResult.DISMISSED |
| 171 | + } |
| 172 | + } |
| 173 | +} |
| 174 | + |
| 175 | +/** |
| 176 | + * Parameters for the [GravatarOAuthActivity]. |
| 177 | + */ |
| 178 | +internal class GravatarOAuthActivityParams( |
| 179 | + val oAuthParams: OAuthParams, |
| 180 | + val email: String, |
| 181 | +) |
| 182 | + |
| 183 | +/** |
| 184 | + * Result enum for the [GravatarQuickEditorActivity]. |
| 185 | + */ |
| 186 | +internal sealed class GravatarOAuthResult { |
| 187 | + data class TOKEN(val token: String) : GravatarOAuthResult() |
| 188 | + |
| 189 | + data object DISMISSED : GravatarOAuthResult() |
| 190 | + |
| 191 | + data object ERROR : GravatarOAuthResult() |
| 192 | +} |
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