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" v-bind:prob="p" v-bind:key="idx">
  20             </my-problem-summary>
  21             <input type="checkbox" id="modal-newproblem" class="modal">
  22             <div role="dialog" aria-labelledby="newProblemTxt">
  23                 <div v-show="newProblem.stage=='nothing'" class="card newproblem-form">
  24                     <label for="modal-newproblem" class="modal-close"></label>
  25                     <h3 id="newProblemTxt">Add problem</h3>
  26                     <form @submit.prevent="previewNewProblem">
  27                         <fieldset>
  28                             <label for="newpbFen">Fen</label>
  29                             <input id="newpbFen" type="text" v-model="newProblem.fen"/>
  30                         </fieldset>
  31                         <fieldset>
  32                             <p class="emphasis">Safe HTML tags allowed</p>
  33                             <label for="newpbInstructions">Instructions</label>
  34                             <textarea id="newpbInstructions" v-model="newProblem.instructions"
  35                                 placeholder="Explain the problem here"/>
  36                             <label for="newpbSolution">Solution</label>
  37                             <textarea id="newpbSolution" v-model="newProblem.solution"
  38                                 placeholder="How to solve the problem?"/>
  39                             <button class="center-btn">Preview</button>
  40                         </fieldset>
  41                     </form>
  42                 </div>
  43                 <div v-show="newProblem.stage=='preview'" class="card newproblem-preview">
  44                     // TODO: we don't want exactly the same display (-date +solution)
  45                     <my-problem-summary v-bind:prob="newProblem"></my-problem-summary>
  46                     <button @click="sendNewProblem()" class="center-btn">Send</button>
  47                 </div>
  48             </div>
  49         </div>
  50     `,
  51     computed: {
  52         sortedProblems: function() {
  53             // Newest problem first
  54             return this.problems.sort((p1,p2) => { return p2.added - p1.added; });
  55         },
  56         mailErrProblem: function() {
  57             return "mailto:contact@vchess.club?subject=[" + variant + " problems] error";
  58         },
  59     },
  60     methods: {
  61         // Propagate "show problem" event to parent component (my-variant)
  62         bubbleUp: function(problem) {
  63             this.$emit('show-problem', JSON.stringify(problem));
  64         },
  65         fetchProblems: function(direction) {
  66             return; //TODO: re-activate after server side is implemented (see routes/all.js)
  67             if (this.problems.length == 0)
  68                 return; //what could we do?!
  69             // Search for newest date (or oldest)
  70             let last_dt = this.problems[0].added;
  71             for (let i=0; i<this.problems.length; i++)
  72             {
  73                 if ((direction == "forward" && this.problems[i].added > last_dt) ||
  74                     (direction == "backward" && this.problems[i].added < last_dt))
  75                 {
  76                     last_dt = this.problems[i].added;
  77                 }
  78             }
  79             ajax("/problems/" + variant, "GET", {
  80                 direction: direction,
  81                 last_dt: last_dt,
  82             }, response => {
  83                 if (response.problems.length > 0)
  84                     this.problems = response.problems;
  85             });
  86         },
  87         showNewproblemModal: function() {
  88             document.getElementById("modal-newproblem").checked = true;
  89         },
  90         previewNewProblem: function() {
  91             if (!V.IsGoodFen(this.newProblem.fen))
  92                 return alert("Bad FEN string");
  93             this.newProblem.stage = "preview";
  94         },
  95         sendNewProblem: function() {
  96             // Send it to the server and close modal
  97             ajax("/problems/" + variant, "POST", {
  98                 fen: this.newProblem.fen,
  99                 instructions: this.newProblem.instructions,
 100                 solution: this.newProblem.solution,
 101             }, response => {
 102                 document.getElementById("modal-newproblem").checked = false;
 103                 this.newProblem.stage = "nothing";
 104             });
 105         },
 106     },
 107 })