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annotate rlgterm.js @ 39:e8ac0e3d2614

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RLG-Web: separate logging in and starting a game. The user now logs in with a username and password, receiving a token which is then used for any actions requiring authentication. Starting a game is one such action. Games use a different set of id keys. This allows users to supply their passwords once and then play any number of successive games. Also, newly registered users do not need to supply their passwords again.
author John "Elwin" Edwards <elwin@sdf.org>
date Thu, 07 Jun 2012 15:43:06 -0700
parents b06a14876645
children ea3b7775009d
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1 /* rlgterm.js: Roguelike Gallery's driver for termemu.js */
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2
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3 // A state machine that keeps track of polling the server.
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4 var ajaxstate = {
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5 state: 0,
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6 timerID: null,
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7 clear: function () {
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8 if (this.timerID != null) {
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9 window.clearTimeout(this.timerID);
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10 this.timerID = null;
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11 }
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12 },
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13 set: function (ms) {
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14 this.clear();
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15 this.timerID = window.setTimeout(getData, ms);
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16 },
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17 gotdata: function () {
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18 this.set(1000);
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19 this.state = 1;
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20 },
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21 gotnothing: function () {
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22 if (this.state == 0) {
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23 this.set(1000);
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24 this.state = 1;
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25 }
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26 else if (this.state < 4) {
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27 this.set(4000);
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28 this.state++;
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29 }
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30 else if (this.state < 8) {
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31 this.set(15000);
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32 this.state++;
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33 }
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34 else {
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35 /* It's been over a minute. Stop polling. */
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36 this.clear();
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37 }
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38 },
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39 posted: function (wasdata) {
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40 if (wasdata) {
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41 this.set(1000);
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42 this.state = 1;
0
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43 }
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44 else {
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45 this.set(200);
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46 this.state = 0;
0
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47 }
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48 }
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49 };
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50
39
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51 /* Login name and key */
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52 var lname = null;
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53 var lcred = null;
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54
0
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55 function writeData(hexstr) {
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56 var codenum;
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57 var codes = [];
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58 var nc;
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59 var u8wait = 0; /* Stores bits from previous bytes of multibyte sequences. */
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60 var expect = 0; /* The number of 10------ bytes expected. */
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61 /* UTF-8 translation. */
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62 for (var i = 0; i < hexstr.length; i += 2) {
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63 nc = Number("0x" + hexstr.substr(i, 2));
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64 if (nc < 0x7F) {
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65 /* 0------- */
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66 codes.push(nc);
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67 /* Any incomplete sequence will be discarded. */
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68 u8wait = 0;
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69 expect = 0;
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70 }
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71 else if (nc < 0xC0) {
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72 /* 10------ : part of a multibyte sequence */
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73 if (expect > 0) {
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74 u8wait <<= 6;
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75 u8wait += (nc & 0x3F);
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76 expect--;
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77 if (expect == 0) {
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78 codes.push(u8wait);
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79 u8wait = 0;
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80 }
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81 }
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82 else {
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83 /* Assume an initial byte was missed. */
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84 u8wait = 0;
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