From 64b098943c02cd1448576272da34c2a6f4b0bc1b Mon Sep 17 00:00:00 2001
From: Gianni Ceccarelli <gianni.ceccarelli@broadbean.com>
Date: Tue, 30 Jul 2019 09:46:15 +0100
Subject: other half of JS implementation

---
 js/mixed-server.js | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)

diff --git a/js/mixed-server.js b/js/mixed-server.js
index 3e103ed..966db7b 100644
--- a/js/mixed-server.js
+++ b/js/mixed-server.js
@@ -74,6 +74,67 @@ class HTTPController {
 }
 HTTPController.url_parse = require('url').parse;
 
+class LineController {
+    constructor(model,view) {
+        this.model = model;
+        this.view = view;
+    }
+
+    on_command(conn,command,args_string) {
+        if (command == 'get') {
+            this.get_words(conn,args_string);
+        }
+        else if (command == 'put') {
+            this.put_words(conn,args_string);
+        }
+        else {
+            this.reply(conn,"bad command, only 'get' and 'put'");
+        }
+    }
+
+    reply(conn,text) {
+        conn.write(`${text}\n`);
+    }
+
+    get_words(conn,args_string) {
+        const how_many = parseInt(args_string,10) || 10;
+        const most_common_pairs = this.model.get_most_common_pairs(how_many);
+        const table = this.view.table_from_ranked_pairs(most_common_pairs);
+
+        this.reply(conn,table);
+    }
+
+    put_words(conn,args_string) {
+        const words = this.view.words_from_input(args_string);
+        this.model.add_words(words);
+        this.reply(conn,'ok');
+    }
+}
+
+const net = require('net');
+class TextServer extends net.Server {
+    constructor(controller) {
+        super( {}, (c) => {
+            c.setEncoding('utf-8');
+            let input='';
+            c.on('data', (buffer) => {
+                input += buffer;
+                let lines = input.split(/\r?\n/);
+                input = lines.pop();
+                for (const line of lines) {
+                    const m = line.match(/^(\S+)(?:\s+(.+))?$/);
+                    if (m) {
+                        controller.on_command(
+                            c,
+                            m[1], m[2],
+                        );
+                    }
+                }
+            });
+        });
+    }
+}
+
 const model = new Model();
 const view = new View();
 
@@ -84,3 +145,7 @@ const httpserver = http.createServer((req,res) => {
 });
 
 httpserver.listen(8080,'localhost');
+
+const linecontroller = new LineController(model,view);
+const textserver = new TextServer(linecontroller);
+textserver.listen(2020,'localhost');
-- 
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