Feature/add presentations

.github/ISSUE_TEMPLATE/presentation-submission.md

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+---
+name: Presentation Submission
+about: Submit Vue.js presentation to post for the community
+title: "[Presentation]"
+labels: ''
+assignees: ''
+---
+
+## Presentation
+
+No need to post an issue for a presentation just get the presentation author authorization and submit a pull request following [this format](https://github.com/vuejs/events/compare/master...presnetation-pr-example?template=pull-request-presentation.md)
+
+If you meet a deadlink or a wrong informations please contact the author of the presentation.

.github/PULL_REQUEST_TEMPLATE/pull-request-presentation.md

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+---
+name: Presentation PR
+about: Share a new presnetation
+title: ''
+labels: ''
+assignees: ''
+---
+
+Thank you for submitting a presentation.
+
+To submit a presentation you just need to add a json file that contain your data at: src/.vuepress/data/presentations/\[theme\]/\[year\]/presentation-title.json
+
+The json format is the following, please copy it fully even if some fields are not filled:
+
+{
+  "slides": "",
+  "author": "",
+  "sourceLanguage": "",
+  "city": "",
+  "country": "",
+  "vueVersion": "",
+  "event": {
+    "name": "",
+    "link": ""
+  },
+  "gitRepository": "",
+  "videoLink": "",
+  "reachSpeaker": {
+    "twitter": "",
+    "github": "",
+    "vueDiscord": "",
+    "email": ""
+  },
+  "description": ""
+}

src/.vuepress/components/PresentationFilters.vue

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+<template>
+  <div>
+    <div style="margin-top: 20px;">
+      <label for="title-input">Title:</label>
+      <input id="title-input" class="input-css" v-model="value.title" placeholder="Type to filter title that contains your search" />
+    </div>
+    <div style="margin-top: 20px;">
+      <p>Filters:</p>
+      <select v-model="value.theme" class="select-css">
+        <option value="">Theme</option>
+        <option v-for="item in themes">{{item}}</option>
+      </select>
+      <select v-model="value.year" class="select-css">
+        <option value="">Year</option>
+        <option v-for="item in years">{{item}}</option>
+      </select>
+      <select v-model="value.author" class="select-css">
+        <option value="">Author</option>
+        <option v-for="item in getItemsForPresentationKey('author')">{{item}}</option>
+      </select>
+      <select v-model="value.event" class="select-css">
+        <option value="">Event</option>
+        <option v-for="item in getItemsForPresentationKey('event', 'name')">{{item}}</option>
+      </select>
+      <select v-model="value.country" class="select-css">
+        <option value="">Country</option>
+        <option v-for="item in getItemsForPresentationKey('country')">{{item}}</option>
+      </select>
+      <select v-model="value.language" class="select-css">
+        <option value="">Language</option>
+        <option v-for="item in getItemsForPresentationKey('sourceLanguage')">{{item}}</option>
+      </select>
+    </div>
+  </div>
+</template>
+
+<script>
+import {presentationData} from '../data';
+export default {
+  name: "PresentationFilters",
+  props: {
+    value: {
+      type: Object,
+      required: true
+    },
+  },
+  computed: {
+    themes() {
+      return Object.keys(presentationData);
+    },
+    years() {
+      let years = [];
+      Object.values(presentationData).forEach(presentationByYear => {
+        // presentationByYear look like {2019: [...], 2020: [...]}
+        // So basically we concat the keys of presentationByYear with already found years and put it in a set to avoid duplcate
+        years = [...new Set(years.concat(Object.keys(presentationByYear)))]
+      })
+      return years
+    }
+  },
+  data() {
+    return {};
+  },
+  methods: {
+    getItemsForPresentationKey(key, subKey=null) {
+      const items = new Set();
+      Object.values(presentationData).forEach(presentationsByYear => {
+        // presentationByYear look like {2019: [...], 2020: [...]}
+
+        Object.values(presentationsByYear).forEach(presentations => {
+          presentations.forEach(presentation => {
+            // presentation is a presentation object as declared in json file
+            if(!subKey && presentation[key]) {
+              return items.add(presentation[key])
+            }
+            else if(presentation[key] && presentation[key][subKey]) {
+              items.add(presentation[key][subKey])
+            }
+          })
+        })
+      })
+      return items
+    }
+  }
+};
+</script>
+
+<style lang="css" scoped>
+  .select-css {
+    margin-right: 10px;
+    font-size: 16px;
+    font-family: sans-serif;
+    font-weight: 700;
+    color: #444;
+    line-height: 1.3;
+    padding: .6em 1.4em .5em .8em;
+    box-sizing: border-box;
+    border: 1px solid #aaa;
+    box-shadow: 0 1px 0 1px rgba(0,0,0,.04);
+    border-radius: .5em;
+    -moz-appearance: none;
+    -webkit-appearance: none;
+    appearance: none;
+    background-color: #fff;
+    background-image: url('data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%23007CB2%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E'),
+      linear-gradient(to bottom, #ffffff 0%,#e5e5e5 100%);
+    background-repeat: no-repeat, repeat;
+    background-position: right .7em top 50%, 0 0;
+    background-size: .65em auto, 100%;
+  }
+  .select-css::-ms-expand {
+    display: none;
+  }
+  .select-css:hover {
+    border-color: #888;
+  }
+  .select-css:focus {
+    border-color: #aaa;
+    box-shadow: 0 0 1px 3px rgba(59, 153, 252, .7);
+    box-shadow: 0 0 0 3px -moz-mac-focusring;
+    color: #222;
+    outline: none;
+  }
+  .select-css option {
+    font-weight:normal;
+  }
+
+
+  .input-css {
+    width: 100%;
+    padding: 12px 20px;
+    margin: 8px 0;
+    display: inline-block;
+    border: 1px solid #ccc;
+    border-radius: 4px;
+    box-sizing: border-box;
+  }
+</style>

src/.vuepress/components/PresentationInfoLine.vue

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+<template>
+  <li>{{text}} 
+    <a 
+      v-if="link" 
+      :href="link"
+      target="_blank"
+      rel="noopener noreferrer">
+      {{value}}
+    </a>
+    <span v-else>{{value}}</span>
+  </li>
+</template>
+
+<script>
+export default {
+  name: "PresentationInfoLine",
+  props: {
+    text: {
+      type: String,
+      default: ""
+    },
+    value: {
+      type: String,
+      default: ""
+    },
+    link: {
+      type: String,
+      default: ""
+    }
+  },
+};
+</script>

src/.vuepress/components/PresentationItem.vue

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+<template>
+  <div>
+    <h4>{{presentation.title}} ({{year}}) <span class="author-by">by {{presentation.author}}</span></h4>
+    <ul>
+      <PresentationInfoLine text="Slides:" :value="presentation.slides" :link="presentation.slides" />
+      <PresentationInfoLine text="Vue version:" :value="presentation.vueVersion" />
+      <PresentationInfoLine text="Source Language:" :value="presentation.sourceLanguage" />
+      <PresentationInfoLine text="City:" :value="`${presentation.city}, ${presentation.country}`" />
+      <PresentationInfoLine text="Event:" :value="presentation.event.name" :link="presentation.event.link" />
+      <PresentationInfoLine text="Git:" :value="presentation.gitRepository" :link="presentation.gitRepository" />
+      <PresentationInfoLine text="Video:" :value="presentation.video" :link="presentation.video" />
+      <PresentationInfoLine text="Source Language:" :value="presentation.sourceLanguage" />
+      <li>Reach Speaker: 
+        <ul>
+          <PresentationInfoLine text="Twitter:" :value="presentation.reachSpeaker.twitter" :link="presentation.reachSpeaker.twitter" />
+          <PresentationInfoLine text="Github:" :value="presentation.reachSpeaker.github" :link="presentation.reachSpeaker.github" />
+          <PresentationInfoLine text="Vue Discord:" :value="presentation.reachSpeaker.vueDiscord" />
+          <PresentationInfoLine text="Email:" :value="presentation.reachSpeaker.email" />
+        </ul>
+      </li>
+    </ul>
+    <strong>Description:</strong>
+    <p>{{presentation.description}}</p>
+  </div>
+</template>
+
+<script>
+import PresentationInfoLine from './PresentationInfoLine';
+
+export default {
+  name: "PresentationItem",
+  components: {
+    PresentationInfoLine,
+  },
+  props: {
+    presentation: {
+      type: Object,
+      required: true
+    },
+    year: {
+      type: String,
+      required: true
+    }
+  },
+  computed: {
+    presentationWithMeta() {
+      const presentationWithMeta = {};
+      Object.entries(this.presentation).forEach(([key, value]) => {
+        if(["description"].includes(key)) {
+          return;
+        }
+
+      })
+    }
+  }
+};
+</script>
+
+<style lang="css" scoped>
+.author-by {
+  float: right;
+}
+</style>