public/javascripts/components/problems.js

   1 Vue.component('my-problems', {
   2     data: function () {
   3         return {
   4             problems: problemArray, //initial value
   5             newProblem: {
   6                 fen: V.GenRandInitFen(),
   7                 instructions: "",
   8                 solution: "",
   9                 stage: "nothing", //or "preview" after new problem is filled
  10             },
  11         };
  12     },
  13     template: `
  14         <div>
  15             <button @click="fetchProblems('backward')">Previous</button>
  16             <button @click="fetchProblems('forward')">Next</button>
  17             <button @click="showNewproblemModal">New</button>
  18             <my-problem-summary v-on:show-problem="bubbleUp(p)"
  19                 v-for="(p,idx) in sortedProblems"
  20                 v-bind:prob="p" v-bind:preview="false" v-bind:key="idx">
  21             </my-problem-summary>
  22             <input type="checkbox" id="modal-newproblem" class="modal">
  23             <div role="dialog" aria-labelledby="newProblemTxt">
  24                 <div v-show="newProblem.stage=='nothing'" class="card newproblem-form">
  25                     <label for="modal-newproblem" class="modal-close"></label>
  26                     <h3 id="newProblemTxt">Add problem</h3>
  27                     <form @submit.prevent="previewNewProblem">
  28                         <fieldset>
  29                             <label for="newpbFen">Fen</label>
  30                             <input id="newpbFen" type="text" v-model="newProblem.fen"/>
  31                         </fieldset>
  32                         <fieldset>
  33                             <p class="emphasis">Safe HTML tags allowed</p>
  34                             <label for="newpbInstructions">Instructions</label>
  35                             <textarea id="newpbInstructions" v-model="newProblem.instructions"
  36                                 placeholder="Explain the problem here"></textarea>
  37                             <label for="newpbSolution">Solution</label>
  38                             <textarea id="newpbSolution" v-model="newProblem.solution"
  39                                 placeholder="How to solve the problem?"></textarea>
  40                             <button class="center-btn">Preview</button>
  41                         </fieldset>
  42                     </form>
  43                 </div>
  44                 <div v-show="newProblem.stage=='preview'" class="card newproblem-preview">
  45                     <label for="modal-newproblem" class="modal-close"></label>
  46                     <my-problem-summary v-bind:prob="newProblem" v-bind:preview="true">
  47                     </my-problem-summary>
  48                     <div class="col-sm-12 col-md-6 col-lg-3 col-lg-offset-3 topspace">
  49                         <button @click="sendNewProblem()">Send</button>
  50                         <button @click="newProblem.stage='nothing'">Cancel</button>
  51                     </div>
  52                 </div>
  53             </div>
  54         </div>
  55     `,
  56     computed: {
  57         sortedProblems: function() {
  58             // Newest problem first
  59             return this.problems.sort((p1,p2) => { return p2.added - p1.added; });
  60         },
  61         mailErrProblem: function() {
  62             return "mailto:contact@vchess.club?subject=[" + variant + " problems] error";
  63         },
  64     },
  65     methods: {
  66         // Propagate "show problem" event to parent component (my-variant)
  67         bubbleUp: function(problem) {
  68             this.$emit('show-problem', JSON.stringify(problem));
  69         },
  70         fetchProblems: function(direction) {
  71             return; //TODO: re-activate after server side is implemented (see routes/all.js)
  72             if (this.problems.length == 0)
  73                 return; //what could we do?!
  74             // Search for newest date (or oldest)
  75             let last_dt = this.problems[0].added;
  76             for (let i=0; i<this.problems.length; i++)
  77             {
  78                 if ((direction == "forward" && this.problems[i].added > last_dt) ||
  79                     (direction == "backward" && this.problems[i].added < last_dt))
  80                 {
  81                     last_dt = this.problems[i].added;
  82                 }
  83             }
  84             ajax("/problems/" + variant, "GET", {
  85                 direction: direction,
  86                 last_dt: last_dt,
  87             }, response => {
  88                 if (response.problems.length > 0)
  89                     this.problems = response.problems;
  90             });
  91         },
  92         showNewproblemModal: function() {
  93             document.getElementById("modal-newproblem").checked = true;
  94         },
  95         previewNewProblem: function() {
  96             if (!V.IsGoodFen(this.newProblem.fen))
  97                 return alert("Bad FEN string");
  98             this.newProblem.stage = "preview";
  99         },
 100         sendNewProblem: function() {
 101             // Send it to the server and close modal
 102             ajax("/problems/" + variant, "POST", {
 103                 fen: this.newProblem.fen,
 104                 instructions: this.newProblem.instructions,
 105                 solution: this.newProblem.solution,
 106             }, response => {
 107                 this.newProblem.added = Date.now();
 108                 this.problems.push(JSON.parse(JSON.stringify(this.newProblem)));
 109                 document.getElementById("modal-newproblem").checked = false;
 110                 this.newProblem.stage = "nothing";
 111             });
 112         },
 113     },
 114 })