{% extends "base_2020.html" %}
{% block lang %}fr{% endblock %}
{% block title %}Recherche{% endblock %}
{% block description %}Voici l’espace personnel de David Larlet sur le Web.{% endblock %}
{% block content %}
  <article>
    <header>
      <h1>Recherche</h1>
    </header>
    <nav>
      <p class="center">
        <nobr>
          <a href="/david/" title="Aller à l’accueil">
            <svg class="icon icon-home">
              <use xlink:href="/static/david/icons2/symbol-defs-2022-03.svg#icon-home"></use>
            </svg>
          Accueil</a>
        </nobr>
      </p>
    </nav>
    <hr>
    <form action="https://duckduckgo.com/" method="get" id="form-search">
      <label for="input-search">Termes de votre recherche :</label>
      <input type="search" name="q" id="input-search" required>
      <input type="hidden" name="sites" value="larlet.fr">
      <button>Chercher</button>
      <button type="reset">Annuler</button>
    </form>
    <p id="search-status" role="status"></p>
    <div id="search-results"></div>
    <hr>
    <p>
      Seuls les écrits de ces dernières années sont indexés.
      Vous pouvez aussi consulter les archives chronologiques de
      <a href="/david/2024/">2024</a>,
      <a href="/david/2023/">2023</a>,
      <a href="/david/2022/">2022</a>,
      <a href="/david/2021/">2021</a>,
      <a href="/david/2020/">2020</a>,
      <a href="/david/blog/">etc</a>.
    </p>
  {% endblock content %}
  {% block extra_body %}
    <template id="search-result">
      <h2>
        <a href="${url}">${title}</a> (${date})
      </h2>
      <p>${content}</p>
    </template>
    {# djlint:off #}
    <script id="search-index" type="application/json">{{ search_index }}</script>
    {# djlint:on #}
    <!-- French stopwords from https://github.com/stopwords-iso/stopwords-fr -->
    <script id="search-stop-words" type="application/json">
      [
        "a", "abord", "absolument", "afin", "ah", "ai", "aie", "aient", "aies",
        "ailleurs", "ainsi", "ait", "allaient", "allo", "allons", "allô",
        "alors", "anterieur", "anterieure", "anterieures", "apres", "après",
        "as", "assez", "attendu", "au", "aucun", "aucune", "aucuns", "aujourd",
        "aujourd'hui", "aupres", "auquel", "aura", "aurai", "auraient", "aurais",
        "aurait", "auras", "aurez", "auriez", "aurions", "aurons", "auront",
        "aussi", "autant", "autre", "autrefois", "autrement", "autres", "autrui",
        "aux", "auxquelles", "auxquels", "avaient", "avais", "avait", "avant",
        "avec", "avez", "aviez", "avions", "avoir", "avons", "ayant", "ayez",
        "ayons", "b", "bah", "bas", "basee", "bat", "beau", "beaucoup", "bien",
        "bigre", "bon", "boum", "bravo", "brrr", "c", "car", "ce", "ceci",
        "cela", "celle", "celle-ci", "celle-là", "celles", "celles-ci",
        "celles-là", "celui", "celui-ci", "celui-là", "celà", "cent",
        "cependant", "certain", "certaine", "certaines", "certains", "certes",
        "ces", "cet", "cette", "ceux", "ceux-ci", "ceux-là", "chacun", "chacune",
        "chaque", "cher", "chers", "chez", "chiche", "chut", "chère", "chères",
        "ci", "cinq", "cinquantaine", "cinquante", "cinquantième", "cinquième",
        "clac", "clic", "combien", "comme", "comment", "comparable",
        "comparables", "compris", "concernant", "contre", "couic", "crac", "d",
        "da", "dans", "de", "debout", "dedans", "dehors", "deja", "delà",
        "depuis", "dernier", "derniere", "derriere", "derrière", "des",
        "desormais", "desquelles", "desquels", "dessous", "dessus", "deux",
        "deuxième", "deuxièmement", "devant", "devers", "devra", "devrait",
        "different", "differentes", "differents", "différent", "différente",
        "différentes", "différents", "dire", "directe", "directement", "dit",
        "dite", "dits", "divers", "diverse", "diverses", "dix", "dix-huit",
        "dix-neuf", "dix-sept", "dixième", "doit", "doivent", "donc", "dont",
        "dos", "douze", "douzième", "dring", "droite", "du", "duquel", "durant",
        "dès", "début", "désormais", "e", "effet", "egale", "egalement",
        "egales", "eh", "elle", "elle-même", "elles", "elles-mêmes", "en",
        "encore", "enfin", "entre", "envers", "environ", "es", "essai", "est",
        "et", "etant", "etc", "etre", "eu", "eue", "eues", "euh", "eurent",
        "eus", "eusse", "eussent", "eusses", "eussiez", "eussions", "eut", "eux",
        "eux-mêmes", "exactement", "excepté", "extenso", "exterieur", "eûmes",
        "eût", "eûtes", "f", "fais", "faisaient", "faisant", "fait", "faites",
        "façon", "feront", "fi", "flac", "floc", "fois", "font", "force",
        "furent", "fus", "fusse", "fussent", "fusses", "fussiez", "fussions",
        "fut", "fûmes", "fût", "fûtes", "g", "gens", "h", "ha", "haut", "hein",
        "hem", "hep", "hi", "ho", "holà", "hop", "hormis", "hors", "hou", "houp",
        "hue", "hui", "huit", "huitième", "hum", "hurrah", "hé", "hélas", "i",
        "ici", "il", "ils", "importe", "j", "je", "jusqu", "jusque", "juste",
        "k", "l", "la", "laisser", "laquelle", "las", "le", "lequel", "les",
        "lesquelles", "lesquels", "leur", "leurs", "longtemps", "lors",
        "lorsque", "lui", "lui-meme", "lui-même", "là", "lès", "m", "ma",
        "maint", "maintenant", "mais", "malgre", "malgré", "maximale", "me",
        "meme", "memes", "merci", "mes", "mien", "mienne", "miennes", "miens",
        "mille", "mince", "mine", "minimale", "moi", "moi-meme", "moi-même",
        "moindres", "moins", "mon", "mot", "moyennant", "multiple", "multiples",
        "même", "mêmes", "n", "na", "naturel", "naturelle", "naturelles", "ne",
        "neanmoins", "necessaire", "necessairement", "neuf", "neuvième", "ni",
        "nombreuses", "nombreux", "nommés", "non", "nos", "notamment", "notre",
        "nous", "nous-mêmes", "nouveau", "nouveaux", "nul", "néanmoins", "nôtre",
        "nôtres", "o", "oh", "ohé", "ollé", "olé", "on", "ont", "onze",
        "onzième", "ore", "ou", "ouf", "ouias", "oust", "ouste", "outre",
        "ouvert", "ouverte", "ouverts", "o|", "où", "p", "paf", "pan", "par",
        "parce", "parfois", "parle", "parlent", "parler", "parmi", "parole",
        "parseme", "partant", "particulier", "particulière", "particulièrement",
        "pas", "passé", "pendant", "pense", "permet", "personne", "personnes",
        "peu", "peut", "peuvent", "peux", "pff", "pfft", "pfut", "pif", "pire",
        "pièce", "plein", "plouf", "plupart", "plus", "plusieurs", "plutôt",
        "possessif", "possessifs", "possible", "possibles", "pouah", "pour",
        "pourquoi", "pourrais", "pourrait", "pouvait", "prealable",
        "precisement", "premier", "première", "premièrement", "pres", "probable",
        "probante", "procedant", "proche", "près", "psitt", "pu", "puis",
        "puisque", "pur", "pure", "q", "qu", "quand", "quant", "quant-à-soi",
        "quanta", "quarante", "quatorze", "quatre", "quatre-vingt", "quatrième",
        "quatrièmement", "que", "quel", "quelconque", "quelle", "quelles",
        "quelqu'un", "quelque", "quelques", "quels", "qui", "quiconque",
        "quinze", "quoi", "quoique", "r", "rare", "rarement", "rares",
        "relative", "relativement", "remarquable", "rend", "rendre", "restant",
        "reste", "restent", "restrictif", "retour", "revoici", "revoilà", "rien",
        "s", "sa", "sacrebleu", "sait", "sans", "sapristi", "sauf", "se", "sein",
        "seize", "selon", "semblable", "semblaient", "semble", "semblent",
        "sent", "sept", "septième", "sera", "serai", "seraient", "serais",
        "serait", "seras", "serez", "seriez", "serions", "serons", "seront",
        "ses", "seul", "seule", "seulement", "si", "sien", "sienne", "siennes",
        "siens", "sinon", "six", "sixième", "soi", "soi-même", "soient", "sois",
        "soit", "soixante", "sommes", "son", "sont", "sous", "souvent", "soyez",
        "soyons", "specifique", "specifiques", "speculatif", "stop",
        "strictement", "subtiles", "suffisant", "suffisante", "suffit", "suis",
        "suit", "suivant", "suivante", "suivantes", "suivants", "suivre",
        "sujet", "superpose", "sur", "surtout", "t", "ta", "tac", "tandis",
        "tant", "tardive", "te", "tel", "telle", "tellement", "telles", "tels",
        "tenant", "tend", "tenir", "tente", "tes", "tic", "tien", "tienne",
        "tiennes", "tiens", "toc", "toi", "toi-même", "ton", "touchant",
        "toujours", "tous", "tout", "toute", "toutefois", "toutes", "treize",
        "trente", "tres", "trois", "troisième", "troisièmement", "trop", "très",
        "tsoin", "tsouin", "tu", "té", "u", "un", "une", "unes", "uniformement",
        "unique", "uniques", "uns", "v", "va", "vais", "valeur", "vas", "vers",
        "via", "vif", "vifs", "vingt", "vivat", "vive", "vives", "vlan", "voici",
        "voie", "voient", "voilà", "voire", "vont", "vos", "votre", "vous",
        "vous-mêmes", "vu", "vé", "vôtre", "vôtres", "w", "x", "y", "z", "zut",
        "à", "â", "ça", "ès", "étaient", "étais", "était", "étant", "état",
        "étiez", "étions", "été", "étée", "étées", "étés", "êtes", "être", "ô"
      ]
    </script>
    <script type="text/javascript">
      /* See:
       * https://gomakethings.com/how-to-create-a-search-page-for-a-static-website-with-vanilla-js/
       * https://gomakethings.com/how-to-update-the-url-of-a-page-without-causing-a-reload-using-vanilla-javascript/
       */
      ;
      (function() {
        // Retrieving the search index and stopwords from JSON.
        // See https://v8.dev/blog/cost-of-javascript-2019#json
        let searchIndex = JSON.parse(
          document.getElementById('search-index').textContent
        )
        let stopWords = JSON.parse(
          document.getElementById('search-stop-words').textContent
        )

        // Get the DOM elements
        let form = document.querySelector('#form-search')
        let input = document.querySelector('#input-search')
        let resultList = document.querySelector('#search-results')
        let searchStatus = document.querySelector('#search-status')
        let searchResultTemplate = document.querySelector('#search-result')

        // Make sure required content exists
        if (
          !form ||
          !input ||
          !resultList ||
          !searchStatus ||
          !searchIndex ||
          !stopWords ||
          !searchResultTemplate
        )
          return

        // Create a submit handler
        form.addEventListener('submit', function(event) {
          event.preventDefault()
          search(input.value)
        })

        // Create a typeahead handler
        form.addEventListener('keyup', function(event) {
          search(input.value)
        })

        // Create a reset handler
        form.addEventListener('reset', function() {
          search('')
          searchStatus.innerHTML = ''
        })

        // Check for query strings onload
        onload()

        /**
         * If there's a query string search term, search it on page load
         */
        function onload() {
          let query = new URLSearchParams(window.location.search).get('s')
          if (!query) return
          input.value = query
          search(query)
        }

        /**
         * Search for matches
         * @param  {String} query The term to search for
         */
        function search(query) {
          // Create a regex for each query
          let regMap = query
            .toLowerCase()
            .split(' ')
            .filter(function(word) {
              return word.length && !stopWords.includes(word)
            })
            .map(function(word) {
              return new RegExp(word, 'i')
            })

          // Get and sort the results
          let results = searchIndex
            .reduce(function(results, article, index) {
              // Setup priority count
              let priority = 0

              // Assign priority
              for (let reg of regMap) {
                if (reg.test(article.title)) {
                  priority += 100
                }
                let occurences = article.content.match(reg)
                if (occurences) {
                  priority += occurences.length
                }
              }

              // If any matches, push to results
              if (priority > 0) {
                results.push({
                  priority: priority,
                  article: article,
                })
              }

              return results
            }, [])
            .sort(function(article1, article2) {
              return article2.priority - article1.priority
            })

          results = [
            ...new Map(results.map(item => [item['article']['title'], item])).values()
          ]

          // Display the results
          showResults(results, regMap)

          // Update the URL
          updateURL(query)
        }

        /**
         * Show the search results in the UI
         * @param  {Array}  results The results to display
         * @param  {List}  regMap Regular expressions for the highlights
         */
        function showResults(results, regMap) {
          let status = 'Aucune publication n’a été trouvée 😢'
          let searchResults = ''
          if (results.length) {
            const plural = results.length > 1 ? 's' : ''
            status = `${results.length} publication${plural} trouvée${plural} 🙌`
            searchResults = results
              .map(function(result) {
                return interpolate(searchResultTemplate.innerHTML, {
                  url: result.article.url,
                  title: highlightText(result.article.title, regMap),
                  date: result.article.date,
                  content: highlightText(result.article.content, regMap),
                })
              })
              .join('')
          }
          searchStatus.innerHTML = status
          resultList.innerHTML = searchResults
        }

        /**
         * Get a template from a string
         * https://stackoverflow.com/a/41015840
         * https://gomakethings.com/html-templates-with-vanilla-javascript/
         * @param  {String} str    The string to interpolate
         * @param  {Object} params The parameters
         * @return {String}        The interpolated string
         */
        function interpolate(str, params) {
          let names = Object.keys(params)
          let vals = Object.values(params)
          return new Function(...names, `return \`${str}\``)(...vals)
        }

        /**
         * Highlight the text in the UI
         * @param  {String}  text The content to highlight
         * @param  {List}  regMap Regular expressions for the highlights
         */
        function highlightText(text, regMap) {
          // TODO: deal with close matches when multiple words are looked for,
          // it does not look trivial because you have to memorize positions
          // then create extracts.
          // For instance: `microsoft github`
          const extractBoundariesSize = 100
          const textLength = text.length
          let extracts = []
          for (let reg of regMap) {
            const index = text.search(reg)
            if (index === -1) {
              continue
            }
            let extract = text.substring(
              index - extractBoundariesSize,
              index + reg.source.length + extractBoundariesSize
            )
            // TODISCUSS: we replace with the source but in case there is
            // an uppercase letter it will disappear from the extract
            // (is that confusing or closer to what is expected?)
            extract = extract.replace(reg, `<mark>${reg.source}</mark>`)
            const prefixEllipsis = index - extractBoundariesSize >= 0 ? '…' : ''
            const suffixEllipsis =
              index + extractBoundariesSize <= textLength ? '…' : ''
            extracts.push(`${prefixEllipsis}${extract}${suffixEllipsis}`)
          }
          if (!extracts.length && textLength < 200) {
            // If there is no match but it's a short title, return it.
            return text
          }
          return extracts.join('')
        }

        /**
         * Update the URL with a query string for the search string
         * @param  {String} query The search query
         */
        function updateURL(query) {
          // Create the properties
          let state = history.state
          let title = document.title
          let url = window.location.origin + window.location.pathname
          if (query) {
            url += '?s=' + encodeURI(query)
          }

          // Update the URL
          history.pushState(state, title, url)
        }
      })()
    </script>
  {% endblock %}