client/next_src/views/Problems.vue

   1 <template>
   2   <div class="test">
   3     <TestComp :vname="variant.name"/>
   4   </div>
   5 </template>
   6
   7 <script>
   8 // @ is an alias to /src
   9 import TestComp from "@/components/TestComp.vue";
  10
  11 export default {
  12   name: "test",
  13   components: {
  14     TestComp,
  15   },
  16     data: function() {
  17         return {
  18             variant: {name: "Atomic", id: 3},
  19         };
  20     }
  21 };
  22 </script>
  23 Vue.component('my-problems', {
  24     props: ["probId","settings"],
  25     data: function () {
  26         return {
  27             userId: user.id,
  28             problems: [], //oldest first
  29             myProblems: [], //same, but only mine
  30             singletons: [], //requested problems (using #num)
  31             display: "others", //or "mine"
  32             curProb: null, //(reference to) current displayed problem (if any)
  33             showSolution: false,
  34             nomoreMessage: "",
  35             mode: "analyze", //for game component
  36             pbNum: 0, //to navigate directly to some problem
  37             // New problem (to upload), or existing problem to edit:
  38             modalProb: {
  39                 id: 0, //defined if it's an edit
  40                 uid: 0, //...also
  41                 fen: "",
  42                 instructions: "",
  43                 solution: "",
  44                 preview: false,
  45             },
  46         };
  47     },
  48     // NOTE: always modals first, because otherwise "scroll to the end" undesirable effect
  49     template: `
  50             <div id="problemControls" class="button-group">
  51                 <button :aria-label='translate("Previous problem(s)")' class="tooltip"
  52                     @click="showNext('backward')"
  53                 >
  54                     <i class="material-icons">skip_previous</i>
  55                 </button>
  56                 <button v-if="!!userId" :aria-label='translate("Add a problem")'
  57                     class="tooltip" onClick="doClick('modal-newproblem')"
  58                 >
  59                     {{ translate("New") }}
  60                 </button>
  61                 <button :aria-label='translate("Next problem(s)")' class="tooltip"
  62                     @click="showNext('forward')"
  63                 >
  64                     <i class="material-icons">skip_next</i>
  65                 </button>
  66             </div>
  67             <div id="mainBoard" v-if="!!curProb">
  68                 <div id="instructions-div" class="section-content">
  69                     <p id="problem-instructions">{{ curProb.instructions }}</p>
  70                 </div>
  71                 <my-game :fen="curProb.fen" :mode="mode" :allowMovelist="true"
  72                     :settings="settings">
  73                 </my-game>
  74                 <div id="solution-div" class="section-content">
  75                     <h3 class="clickable" @click="showSolution = !showSolution">
  76                         {{ translate("Show solution") }}
  77                     </h3>
  78                     <p id="problem-solution" v-show="showSolution">{{ curProb.solution }}</p>
  79                 </div>
  80                 <button @click="displayList">Back to list display</button>
  81             </div>
  82             <div>
  83                 <input type="text" placeholder="Type problem number" v-model="pbNum"/>
  84                 <button @click="() => showProblem(pbNum)">Show problem</button>
  85             </div>
  86             <button v-if="!!userId" @click="toggleListDisplay"
  87                 :class="{'only-mine':display=='mine'}"
  88             >
  89                 My problems (only)
  90             </button>
  91             <my-problem-summary v-show="!curProb"
  92                 v-on:edit-problem="editProblem(p)" v-on:delete-problem="deleteProblem(p.id)"
  93                 v-on:show-problem="() => showProblem(p.id)"
  94                 v-for="p in curProblems()" @click="curProb=p"
  95                 v-bind:prob="p" v-bind:userid="userId" v-bind:key="p.id">
  96             </my-problem-summary>
  97         </div>
  98     `,
  99     watch: {
 100         probId: function() {
 101             this.showProblem(this.probId);
 102         },
 103     },
 104     created: function() {
 105         if (!!this.probId)
 106             this.showProblem(this.probId);
 107         else
 108             this.firstFetch();
 109     },
 110     methods: {
 111         translate: translate,
 112         firstFetch: function() {
 113             // Fetch most recent problems from server, for both lists
 114             this.fetchProblems("others", "bacwkard");
 115             this.fetchProblems("mine", "bacwkard");
 116             this.listsInitialized = true;
 117         },
 118         showProblem: function(pid) {
 119             location.hash = "#problems?id=" + pid;
 120             for (let parray of [this.singletons,this.problems,this.myProblems])
 121             {
 122                 const pIdx = parray.findIndex(p => p.id == pid);
 123                 if (pIdx >= 0)
 124                 {
 125                     this.curProb = parray[pIdx];
 126                     break;
 127                 }
 128             }
 129             if (!this.curProb)
 130             {
 131                 // Cannot find problem in current set; get from server, and add to singletons.
 132                 ajax(
 133                     "/problems/" + variant.id + "/" + pid, //TODO: variant ID should not be required
 134                     "GET",
 135                     response => {
 136                         if (!!response.problem)
 137                         {
 138                             this.singletons.push(response.problem);
 139                             this.curProb = response.problem;
 140                             this.display = (response.problem.uid == this.userId ? "mine" : "others");
 141                         }
 142                         else
 143                             this.noMoreProblems("Sorry, problem " + pid + " does not exist");
 144                     }
 145                 );
 146             }
 147             else
 148                 this.display = (this.curProb.uid == this.userId ? "mine" : "others");
 149         },
 150         curProblems: function() {
 151             switch (this.display)
 152             {
 153                 case "others":
 154                     return this.problems;
 155                 case "mine":
 156                     return this.myProblems;
 157             }
 158         },
 159         // TODO?: get 50 from server but only show 10 at a time (for example)
 160         showNext: function(direction) {
 161             const nomorePb =
 162                 problems => {
 163                     if (!problems || problems.length == 0)
 164                         this.noMoreProblems("No more problems in this direction");
 165                 };
 166             if (!this.curProb)
 167                 return this.fetchProblems(this.display, direction, nomorePb);
 168             // Show next problem (older or newer):
 169             let curProbs = this.curProblems();
 170             // Try to find a neighbour problem in the direction, among current set
 171             const neighbor = this.findClosestNeighbor(this.curProb, curProbs, direction);
 172             if (!!neighbor)
 173             {
 174                 this.curProb = neighbor;
 175                 return;
 176             }
 177             // Boundary case: nothing in current set, need to fetch from server
 178             const curSize = curProbs.length;
 179             this.fetchProblems(this.display, direction, problems => {
 180                 if (problems.length > 0)
 181                 {
 182                     // Ok, found something:
 183                     this.curProb =
 184                         this.findClosestNeighbor(this.curProb, curProbs, direction);
 185                 }
 186                 else
 187                     nomorePb();
 188             });
 189         },
 190         findClosestNeighbor: function(problem, probList, direction) {
 191             let neighbor = undefined;
 192             let smallestDistance = Number.MAX_SAFE_INTEGER;
 193             for (let prob of probList)
 194             {
 195                 const delta = Math.abs(prob.id - problem.id);
 196                 if (delta < smallestDistance &&
 197                     ((direction == "backward" && prob.id < problem.id)
 198                     || (direction == "forward" && prob.id > problem.id)))
 199                 {
 200                     neighbor = prob;
 201                     smallestDistance = delta;
 202                 }
 203             }
 204             return neighbor;
 205         },
 206         noMoreProblems: function(message) {
 207             this.nomoreMessage = message;
 208             let modalNomore = document.getElementById("modalNomore");
 209             modalNomore.checked = true;
 210             setTimeout(() => modalNomore.checked = false, 2000);
 211         },
 212         displayList: function() {
 213             this.curProb = null;
 214             location.hash = "#problems";
 215             // Fetch problems if first call (if #num, and then lists)
 216             if (!this.listsInitialized)
 217                 this.firstFetch();
 218         },
 219         toggleListDisplay: function() {
 220             const displays = ["mine","others"];
 221             const curIndex = displays.findIndex(item => item == this.display);
 222             this.display = displays[1-curIndex];
 223         },
 224         fetchProblems: function(type, direction, cb) {
 225             let problems = (type == "others" ? this.problems : this.myProblems);
 226             // "last datetime" set at a value OK for an empty initial array
 227             let last_dt = (direction=="forward" ? 0 : Number.MAX_SAFE_INTEGER);
 228             if (problems.length > 0)
 229             {
 230                 // Search for newest date (or oldest)
 231                 last_dt = problems[0].added;
 232                 for (let i=1; i<problems.length; i++)
 233                 {
 234                     if ((direction == "forward" && problems[i].added > last_dt) ||
 235                         (direction == "backward" && problems[i].added < last_dt))
 236                     {
 237                         last_dt = problems[i].added;
 238                     }
 239                 }
 240             }
 241             ajax(
 242                 "/problems/" + variant.id,
 243                 "GET",
 244                 {
 245                     type: type,
 246                     direction: direction,
 247                     last_dt: last_dt,
 248                 },
 249                 response => {
 250                     if (response.problems.length > 0)
 251                     {
 252                         Array.prototype.push.apply(problems, response.problems.sort(
 253                             (p1,p2) => { return p2.added - p1.added; }));
 254                         // If one list is empty but not the other, show the non-empty
 255                         const otherArray =
 256                             (type == "mine" ? this.problems : this.myProblems);
 257                         if (otherArray.length == 0)
 258                             this.display = type;
 259                         this.$forceUpdate(); //TODO...
 260                     }
 261                     if (!!cb)
 262                         cb(response.problems);
 263                 }
 264             );
 265         },
 266     },
 267 })