Allow email node to fetch node if required

to close #513

social/email/61-email.html

@@ -121,9 +121,16 @@
 
 
 <script type="text/x-red" data-template-name="e-mail in">
-    <div class="form-row node-input-repeat">
+    <div class="form-row">
-        <label for="node-input-repeat"><i class="fa fa-repeat"></i> <span data-i18n="email.label.repeat"></span></label>
+        <label for="node-input-fetch"><i class="fa fa-hourglass-half"></i> <span data-i18n="email.label.getmail"></span></label>
-        <input type="text" id="node-input-repeat" style="width: 80px"> <span data-i18n="email.label.seconds">seconds</span>
+        <select type="text" id="node-input-fetch" style="width:130px;">
+            <option value="auto" data-i18n="email.label.auto"></option>
+            <option value="trigger" data-i18n="email.label.trigger"></option>
+        </select>
+        <span id="node-repeatTime">
+            <span style="margin-left:20px;" data-i18n="email.label.repeat"></span>
+            <input type="text" id="node-input-repeat" style="width:80px"> <span data-i18n="email.label.seconds">seconds</span>
+        </span>
     </div>
     <div class="form-row">
         <label for="node-input-protocol"><i class="fa fa-envelope"></i> <span data-i18n="email.label.protocol"></span></label>
@@ -182,8 +189,8 @@
         };
 
         $("#node-input-useSSL").change(function(x, y) {
-          console.log("useSSL: x="+ JSON.stringify(x) + ", y=" + y);
+          // console.log("useSSL: x="+ JSON.stringify(x) + ", y=" + y);
-          console.log("Value: " + $("#node-input-useSSL").prop("checked"));
+          // console.log("Value: " + $("#node-input-useSSL").prop("checked"));
           checkPorts();
         });
 
@@ -245,15 +252,17 @@
             port: {value:"993",required:true},
             box: {value:"INBOX"}, // For IMAP, The mailbox to process
             disposition: { value: "Read" }, // For IMAP, the disposition of the read email
-            repeat: {value:"300",required:true}
+            repeat: {value:"300",required:true},
+            fetch: {value:"auto"},
+            inputs: {value:0}
         },
         credentials: {
             userid: {type:"text"},
             password: {type: "password"},
             global: { type:"boolean"}
         },
-        inputs:0,
+        inputs: 0,
-        outputs:1,
+        outputs: 1,
         icon: "envelope.png",
         paletteLabel: function() {
             return this._("email.email");
@@ -265,6 +274,7 @@
             return (this.name)?"node_label_italic":"";
         },
         oneditprepare: function() {
+            var that = this;
             if (this.credentials.global) {
                 $('#node-tip').show();
             } else {
@@ -274,6 +284,17 @@
                 $("#node-input-box").val("INBOX");
                 this.box = "INBOX";
             }
+            if ($("#node-input-fetch").val() === null) { $("#node-input-fetch").val("auto"); }
+            $("#node-input-fetch").change(function() {
+                if ($("#node-input-fetch").val() === "trigger") {
+                    $('#node-repeatTime').hide();
+                    that.inputs = 1;
+                }
+                else  {
+                    $('#node-repeatTime').show();
+                    that.inputs = 0;
+                }
+            });
         }
     });
 })();

social/email/61-email.js

@@ -146,12 +146,14 @@ module.exports = function(RED) {
 
         RED.nodes.createNode(this,n);
         this.name = n.name;
+        this.inputs = n.inputs;
         this.repeat = n.repeat * 1000 || 300000;
         if (this.repeat > 2147483647) {
             // setTimeout/Interval has a limit of 2**31-1 Milliseconds
             this.repeat = 2147483647;
             this.error(RED._("email.errors.refreshtoolarge"));
         }
+        if (this.inputs === 1) { this.repeat = 0; }
         this.inserver = n.server || (globalkeys && globalkeys.server) || "imap.gmail.com";
         this.inport = n.port || (globalkeys && globalkeys.port) || "993";
         this.box = n.box || "INBOX";
@@ -315,10 +317,12 @@ module.exports = function(RED) {
         // checkIMAP
         //
         // Check the email sever using the IMAP protocol for new messages.
+        var s = true;
         function checkIMAP(msg) {
             //node.log("Checking IMAP for new messages");
             // We get back a 'ready' event once we have connected to imap
             imap.once("ready", function() {
+                s = true;
                 node.status({fill:"blue", shape:"dot", text:"email.status.fetching"});
                 //console.log("> ready");
                 // Open the inbox folder
@@ -328,6 +332,7 @@ module.exports = function(RED) {
                     //console.log("> Inbox err : %j", err);
                     //console.log("> Inbox open: %j", box);
                     if (err) {
+                        s = false;
                         node.status({fill:"red", shape:"ring", text:"email.status.foldererror"});
                         node.error(RED._("email.errors.fetchfail", {folder:node.box}),err);
                         imap.end();
@@ -337,6 +342,7 @@ module.exports = function(RED) {
                     else {
                         imap.search([ 'UNSEEN' ], function(err, results) {
                             if (err) {
+                                s = false;
                                 node.status({fill:"red", shape:"ring", text:"email.status.foldererror"});
                                 node.error(RED._("email.errors.fetchfail", {folder:node.box}),err);
                                 imap.end();
@@ -347,6 +353,7 @@ module.exports = function(RED) {
                                 //console.log("> search - err=%j, results=%j", err, results);
                                 if (results.length === 0) {
                                     //console.log(" [X] - Nothing to fetch");
+                                    s = true;
                                     node.status({});
                                     imap.end();
                                     setInputRepeatTimeout();
@@ -386,6 +393,7 @@ module.exports = function(RED) {
 
                                 // When we have fetched all the messages, we don't need the imap connection any more.
                                 fetch.on('end', function() {
+                                    s = true;
                                     node.status({});
                                     var cleanup = function() {
                                         imap.end();
@@ -409,6 +417,7 @@ module.exports = function(RED) {
                     }
                 }); // End of imap->openInbox
             }); // End of imap->ready
+            s = false;
             node.status({fill:"grey",shape:"dot",text:"node-red:common.status.connecting"});
             imap.connect();
         } // End of checkIMAP
@@ -416,10 +425,13 @@ module.exports = function(RED) {
 
         // Perform a check of the email inboxes using either POP3 or IMAP
         function checkEmail(msg) {
+            console.log("STAT",s);
             if (node.protocol === "POP3") {
                 checkPOP3(msg);
             } else if (node.protocol === "IMAP") {
-                checkIMAP(msg);
+                if (s !== false) {
+                    checkIMAP(msg);
+                }
             }
         }  // End of checkEmail
 
@@ -437,8 +449,10 @@ module.exports = function(RED) {
             imap.on('error', function(err) {
                 if (err.errno !== "ECONNRESET") {
                     node.log(err);
+                    s = true;
                     node.status({fill:"red",shape:"ring",text:"email.status.connecterror"});
                 }
+                setInputRepeatTimeout()
             });
         }
 
@@ -462,7 +476,7 @@ module.exports = function(RED) {
             }
         }
 
-        node.emit("input",{});
+        if (this.inputs !== 1) { node.emit("input",{}); }
     }
 
     RED.nodes.registerType("e-mail in",EmailInNode,{

social/email/locales/en-US/61-email.json

@@ -2,13 +2,16 @@
     "email": {
         "email": "email",
         "label": {
+            "getmail":"Get mail",
+            "auto": "automatically",
+            "trigger": "when triggered",
             "to": "To",
             "server": "Server",
             "port": "Port",
             "useSecureConnection": "Use secure connection.",
             "userid": "Userid",
             "password": "Password",
-            "repeat": "Refresh",
+            "repeat": "every",
             "seconds": "seconds",
             "folder": "Folder",
             "protocol": "Protocol",

social/email/package.json

@@ -1,6 +1,6 @@
 {
   "name": "node-red-node-email",
-  "version": "1.0.7",
+  "version": "1.1.0",
   "description": "Node-RED nodes to send and receive simple emails",
   "dependencies": {
     "imap": "^0.8.19",