Added support for saved services

app/src/main/assets/web/css/style.css

@@ -18,25 +18,32 @@ html, body {
 }
 
 .services {
-  width: 50%;
+  width: 60%;
   height: max-content;
-  min-width: 15em;
+  min-width: 17em;
   max-width: 22.5em;
   background: white;
-  margin-top: 3em;
+  margin-top: 2em;
   box-shadow: 1px 1px 2px 2px #bbb;
   border-radius: 1.5em;
 }
 
+.services h3 {
+  width: 100%;
+  text-align: center;
+}
+
 .no-items {
   text-align: center;
   padding: 2em 1em;
 }
 
 .service {
+  width: 100%;
   padding: 1em .5em;
   border-bottom: 1px solid #ccc;
   cursor: pointer;
+  position: relative;
 }
 
 .service:first-child {
@@ -51,6 +58,16 @@ html, body {
   background: #bef6da;
 }
 
+.service .remove {
+    position: absolute;
+    right: 1.5em;
+}
+
+.service .remove img {
+    width: 1.2em;
+    height: 1.2em;
+}
+
 .name {
   font-weight: bold;
 }
@@ -69,6 +86,7 @@ html, body {
   opacity: .75;
 }
 
+/* Add host modal */
 .add-modal-container {
   width: 100%;
   height: 100%;
@@ -128,6 +146,16 @@ html, body {
   font-size: 1.05em;
 }
 
+.add-modal .buttons {
+    width: 100%;
+    display: flex;
+    align-items: center;
+}
+
+.add-modal .buttons .button {
+    width: 50%;
+}
+
 /* Splash screen */
 .splash {
     width: 100vw;

app/src/main/assets/web/index.html

@@ -25,18 +25,37 @@
     </div>
 
     <div class="services">
-        <div class="no-items" v-if="!Object.keys(services).length">
+        <div class="saved" v-if="services.saved?.length">
+            <h3>Saved services</h3>
+
+            <div class="service" v-for="(service, i) in services.saved" :key="i"
+                 @click="onServiceClick(service)">
+                <span class="name" v-text="service.name" v-if="service.name"></span>
+                <span v-if="service.name"> on </span>
+                <span class="address" v-text="service.host"></span>:<span class="port" v-text="service.port"></span>
+                <span class="remove" @click="removeService(i, $event)">
+                    <img src="img/trash.png" alt="Remove">
+                </span>
+            </div>
+        </div>
+
+        <div class="scanned">
+            <h3>Scanned services</h3>
+
+            <div class="no-items" v-if="!services.scanned?.length">
                 <div class="empty">No Platypush web services found on the network</div>
             </div>
 
-        <div class="service" v-for="(service, i) in services" :key="i" @click="onClick(service)">
+            <div class="service" v-for="(service, i) in services.scanned" :key="i"
+                 @click="onServiceClick(service)">
                 <span class="name" v-text="service.name" v-if="service.name"></span>
                 <span v-if="service.name"> on </span>
                 <span class="address" v-text="service.host"></span>:<span class="port" v-text="service.port"></span>
             </div>
         </div>
+    </div>
 
-    <div class="add-modal-container" @click="addModalVisible = false" v-if="addModalVisible">
+    <div class="add-modal-container" @click="addModal.visible = false" v-if="addModal.visible">
         <div class="add-modal-background"></div>
         <div class="add-modal" @click="$event.stopPropagation()">
             <div class="header">
@@ -44,22 +63,36 @@
             </div>
 
             <div class="body">
-                <form @submit.prevent="onConnect">
+                <form @submit.prevent="onServiceConnect">
                     <label>
-                        <input type="text" placeholder="IP or hostname" v-model="addModalHost">
+                        <input type="text" placeholder="IP or hostname" v-model="addModal.host">
                     </label>
 
                     <label>
-                        <input type="number" placeholder="Port" v-model="addModalPort">
+                        <input type="number" placeholder="Port" v-model="addModal.port">
                     </label>
 
+                    <label v-if="addModal.save">
+                        <input type="text" placeholder="Name" v-model="addModal.name">
+                    </label>
+
+                    <div class="buttons">
+                        <div class="button">
                             <input type="submit" value="Connect">
+                        </div>
+                        <div class="button">
+                            <label>
+                                Remember this host
+                                <input type="checkbox" v-model="addModal.save">
+                            </label>
+                        </div>
+                    </div>
                 </form>
             </div>
         </div>
     </div>
 
-    <div class="add-btn" @click="addModalVisible = true"></div>
+    <div class="add-btn" @click="addModal.visible = true"></div>
 </div>
 
 <script type="text/javascript" src="js/main.js"></script>

app/src/main/assets/web/js/main.js

@@ -4,47 +4,164 @@ new Vue({
         return {
             loading: false,
             splash: false,
-            services: {},
-            addModalVisible: false,
-            addModalHost: undefined,
-            addModalPort: 8008,
+            services: {
+                scanned: [],
+                saved: [],
+            },
+            addModal: {
+                visible: false,
+                host: undefined,
+                port: 8008,
+                name: undefined,
+                save: false,
+            },
         }
     },
 
+    computed: {
+        servicesByName: function() {
+            return Object.values(this.services).reduce((obj, services) =>
+                services.reduce((obj2, srv) => {
+                    obj2[srv.name] = srv
+                    return obj2
+                }, obj), {})
+        },
+
+        servicesByHostAndPort: function() {
+            return Object.values(this.services).reduce((obj, services) =>
+                services.reduce((obj2, srv) => {
+                    obj2[`${srv.host}:${srv.port}`] = srv
+                    return obj2
+                }, obj), {})
+        },
+    },
+
     methods: {
         refresh: function() {
-            this.services = {
-                ...this.services,
-                ...JSON.parse(app.pollServices()),
+            this.services.scanned = [
+                ...this.services.scanned,
+                ...JSON.parse(app.pollServices()).filter((srv) => !(srv.name in this.servicesByName)),
+            ]
+        },
+
+        onServiceClick: function(service) {
+            this.connect(service.host, service.port)
+        },
+
+        onServiceConnect: function() {
+            if (!this.addModal.host?.length) {
+                app.alert('Please specify a host name or IP address')
+                return
+            }
+
+            if (this.addModal.save) {
+                if (!this.saveService(this.addModal.host, this.addModal.port, this.addModal.name || ''))
+                    return
+            }
+
+            this.connect(this.addModal.host, this.addModal.port)
+        },
+
+        saveService: function(host, port, name) {
+            name = this.addModal.name.trim()
+            if (!name.length) {
+                app.alert('Please specify a name')
+                return false
+            }
+
+            let overwrite = false
+            if (name in this.servicesByName) {
+                if (!confirm(`A service named ${name} already exists. ` +
+                                 `Do you want to overwrite it?`))
+                    return false
+
+                overwrite = true
+            } else if (`${host}:${port}` in this.servicesByHostAndPort) {
+                if (!confirm(`A service on ${host}:${port} already exists. ` +
+                                 `Do you want to overwrite it?`))
+                    return false
+
+                overwrite = true
+            }
+
+            this.loading = true
+            try {
+                const rs = app.saveService(host, port, name, overwrite)
+                if (rs?.error)
+                    throw rs.error
+
+                this.loadServices()
+                return true
+            } finally {
+                this.loading = false
             }
         },
 
-        onClick: function(service) {
-            this.loadService(service.host, service.port)
+        removeService: function(savedIndex, event) {
+            event.stopPropagation()
+            const srv = this.services.saved[savedIndex]
+            if (!(srv && confirm('Are you sure that you want to remove this service?')))
+                return false
+
+            this.loading = true
+            try {
+                const rs = app.removeService(srv.host, srv.port, srv.name)
+                if (rs?.error)
+                    throw rs.error
+
+                this.loadServices()
+                return true
+            } finally {
+                this.loading = false
+            }
         },
 
-        onConnect: function() {
-            this.loadService(this.addModalHost, this.addModalPort)
-        },
-
-        loadService: function(host, port) {
+        connect: function(host, port) {
             this.loading = true
             app.stopServicesPoll()
             window.location.href = `http://${host}:${port}/`
         },
 
         splashScreen: function(duration) {
-            var self = this
+            const self = this
             this.splash = true
-            window.setTimeout(() => {
+            setTimeout(() => {
                 self.splash = false
             }, duration)
         },
+
+        resetAddModal: function() {
+            this.addModal = {
+                host: undefined,
+                port: 8008,
+                name: undefined,
+                save: false,
+            }
+        },
+
+        loadServices: function() {
+            this.services = {
+                ...this.services,
+                ...JSON.parse(app.loadServices())
+            }
+        },
     },
 
     mounted: function() {
-        this.splashScreen(2500)
+        this.splashScreen(1500)
+
+        this.$watch(() => this.addModal.visible, (newValue) => {
+            if (!newValue)
+                this.resetAddModal()
+        })
+
+        this.$watch(() => this.addModal.save, (newValue) => {
+            if (newValue)
+                this.addModal.name = this.addModal.host
+        })
+
+        this.loadServices()
         app.startServicesPoll()
-        window.setInterval(this.refresh, 500)
+        setInterval(this.refresh, 500)
     }
 })

app/src/main/java/tech/platypush/app/JSON.kt

@@ -0,0 +1,54 @@
+package tech.platypush.app
+
+import org.json.JSONArray
+import org.json.JSONObject
+import java.util.*
+import kotlin.collections.HashMap
+
+
+class JSON {
+    companion object {
+        private fun toMap(obj: JSONObject): Map<String, Any?> {
+            val ret = HashMap<String, Any?>()
+            val keys = obj.keys()
+
+            while (keys.hasNext()) {
+                val key = keys.next()
+                var value = obj[key]
+
+                if (value is JSONObject)
+                    value = toMap(value)
+                else if (value is JSONArray)
+                    value = toList(value)
+
+                ret[key] = value
+            }
+
+            return ret
+        }
+
+        private fun toList(arr: JSONArray): List<Any?> {
+            val ret = LinkedList<Any?>()
+            for (i in 0 until arr.length()) {
+                var value = arr[i]
+
+                if (value is JSONObject)
+                    value = toMap(value)
+                else if (value is JSONArray)
+                    value = toList(value)
+
+                ret.add(value)
+            }
+
+            return ret
+        }
+
+        fun load(str: String): Map<String, Any?> {
+            return toMap(JSONObject(str))
+        }
+
+        fun dump(obj: Map<String, Any?>): String {
+            return JSONObject(obj).toString()
+        }
+    }
+}

app/src/main/java/tech/platypush/app/MainActivity.kt

@@ -2,6 +2,7 @@ package tech.platypush.app
 
 import android.annotation.SuppressLint
 import android.os.Bundle
+import android.webkit.WebChromeClient
 import androidx.appcompat.app.AppCompatActivity
 import kotlinx.android.synthetic.main.activity_main.*
 
@@ -12,6 +13,7 @@ class MainActivity : AppCompatActivity() {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
         webview.webViewClient = WebView()
+        webview.webChromeClient = WebChromeClient()
         webview.settings.javaScriptEnabled = true
         webview.settings.javaScriptCanOpenWindowsAutomatically = true
         webview.clearCache(true)

app/src/main/java/tech/platypush/app/Services.kt

@@ -5,8 +5,12 @@ import android.content.Context
 import android.net.nsd.NsdManager
 import android.net.nsd.NsdServiceInfo
 import android.util.Log
+import java.io.File
+import java.io.FileWriter
+import java.lang.RuntimeException
 import java.util.*
 import java.util.concurrent.locks.ReentrantLock
+import kotlin.concurrent.withLock
 
 
 /**
@@ -20,6 +24,20 @@ data class Service(val host: String, val port: Int, val name: String?) {
            "name" to name
        )
     }
+
+    override fun toString(): String {
+        return JSON.dump(toMap())
+    }
+
+    companion object {
+        fun load(obj: Map<String, Any?>): Service {
+            return Service(
+                    host = obj["host"] as String,
+                    port = obj["port"] as Int,
+                    name = obj["name"] as String?
+            )
+        }
+    }
 }
 
 
@@ -123,3 +141,109 @@ class Scanner(context: Context) {
         })
     }
 }
+
+/**
+ * Services manager class
+ */
+class Manager(context: Context) {
+    private val servicesFile = File(context.filesDir, "services.json")
+    private val servicesFileLock = ReentrantLock()
+    private val emptyServices = mapOf<String, List<Service>>(
+            "saved" to emptyList(),
+            "lastConnected" to emptyList()
+    )
+
+    private fun initServicesFile(reset: Boolean = false) {
+        if (reset || !servicesFile.exists())
+            saveServices(emptyServices)
+    }
+
+    fun loadServices(): Map<String, List<Service>> {
+        initServicesFile()
+        var services: Map<String, List<Service>> = emptyServices
+
+        try {
+            services = deserializeServices(servicesFile.readText())
+        } catch (e: Exception) {
+            Log.e(TAG, "Error while parsing $servicesFile: resetting it", e)
+            initServicesFile(reset = true)
+        }
+
+        return services
+    }
+
+    private fun saveServices(services: Map<String, List<Service>>) {
+        servicesFileLock.withLock {
+            FileWriter(servicesFile).use {
+                it.write(serializeServices(services))
+            }
+        }
+    }
+
+    fun saveService(host: String, port: Int, name: String, overwrite: Boolean = false) {
+        val service = Service(host, port, name)
+        val services = this.loadServices().toMutableMap()
+        val savedServices = services["saved"]?.toMutableList() ?: ArrayList()
+        val dupIndex = getSavedServiceIndex(service, savedServices)
+
+        if (dupIndex != null && !overwrite)
+            throw DuplicateServiceException(service)
+
+        savedServices.add(service)
+        services["saved"] = savedServices
+        saveServices(services)
+    }
+
+    fun removeService(host: String? = null, port: Int? = null, name: String? = null) {
+        val service = Service(host=host ?: "", port=port ?: 0, name=name)
+        val services = this.loadServices().toMutableMap()
+        val savedServices = ArrayList<Service>(services["saved"] ?: emptyList<Service>())
+        val srvIndex = getSavedServiceIndex(service, savedServices)
+                ?: throw NoSuchServiceException(host, port, name)
+
+        savedServices.removeAt(srvIndex)
+        services["saved"] = savedServices
+        saveServices(services)
+    }
+
+    private fun getSavedServiceIndex(service: Service, services: List<Service>): Int? {
+        val matchingSrvIndexes = services.indices.filter {
+            (services[it].host == service.host && services[it].port == service.port) ||
+                    services[it].name == service.name
+        }
+
+        return if (matchingSrvIndexes.isNotEmpty()) matchingSrvIndexes[0] else null
+    }
+
+    fun serializeServices(services: Map<String, List<Service>>): String {
+        val parsedServices = HashMap<String, List<Map<String, Any?>>>()
+
+        for (srvType in listOf("saved", "lastConnected")) {
+            val outputList = LinkedList<Map<String, Any?>>()
+            for (srv in services[srvType] ?: emptyList())
+                outputList.add(srv.toMap())
+            parsedServices[srvType] = outputList.toList()
+        }
+
+        return JSON.dump(parsedServices)
+    }
+
+    private fun deserializeServices(servicesJson: String): Map<String, List<Service>> {
+        @Suppress("UNCHECKED_CAST")
+        val services = JSON.load(servicesJson) as Map<String, List<Map<String, Any?>>>
+        val parsedServices = HashMap<String, List<Service>>()
+
+        for (srvType in listOf("saved", "lastConnected")) {
+            val outputList = LinkedList<Service>()
+            for (srv in services[srvType] ?: emptyList())
+                outputList.add(Service.load(srv))
+            parsedServices[srvType] = outputList
+        }
+
+        return parsedServices
+    }
+}
+
+class DuplicateServiceException(service: Service) : RuntimeException("Duplicate service: $service")
+class NoSuchServiceException(host: String? = null, port: Int? = null, name: String? = null):
+        RuntimeException("No such host: host=$host, port=$port, name=$name")

app/src/main/java/tech/platypush/app/WebAppInterface.kt

@@ -1,6 +1,8 @@
 package tech.platypush.app
 
+import android.content.ContentValues.TAG
 import android.content.Context
+import android.util.Log
 import android.webkit.JavascriptInterface
 import org.json.JSONArray
 import java.util.*
@@ -8,6 +10,7 @@ import java.util.*
 
 class WebAppInterface(context: Context) {
     private val serviceScanner = Scanner(context)
+    private val serviceManager = Manager(context)
 
     @Suppress("unused")
     @JavascriptInterface
@@ -29,4 +32,36 @@ class WebAppInterface(context: Context) {
             services.add(srv.toMap())
         return JSONArray(services).toString()
     }
+
+    @Suppress("unused")
+    @JavascriptInterface
+    fun loadServices(): String {
+        return serviceManager.serializeServices(serviceManager.loadServices())
+    }
+
+    @Suppress("unused")
+    @JavascriptInterface
+    fun saveService(host: String, port: Int, name: String, overwrite: Boolean = false): String? {
+        try {
+            serviceManager.saveService(host, port, name, overwrite=overwrite)
+        } catch (e: Exception) {
+            Log.e(TAG, e.toString())
+            return JSON.dump(mapOf("error" to e.toString()))
+        }
+
+        return null
+    }
+
+    @Suppress("unused")
+    @JavascriptInterface
+    fun removeService(host: String, port: Int, name: String): String? {
+        try {
+            serviceManager.removeService(host, port, name)
+        } catch (e: Exception) {
+            Log.e(TAG, e.toString())
+            return JSON.dump(mapOf("error" to e.toString()))
+        }
+
+        return null
+    }
 }