refactor: move search utils to util.js

assets/js/search.js

@@ -1,115 +1,4 @@
-// code from https://github.com/danestves/markdown-to-text
+; (async function() {
-const removeMarkdown = (
-  markdown,
-  options = {
-    listUnicodeChar: false,
-    stripListLeaders: true,
-    gfm: true,
-    useImgAltText: false,
-    preserveLinks: false,
-  },
-) => {
-  let output = markdown || ""
-  output = output.replace(/^(-\s*?|\*\s*?|_\s*?){3,}\s*$/gm, "")
-
-  try {
-    if (options.stripListLeaders) {
-      if (options.listUnicodeChar)
-        output = output.replace(/^([\s\t]*)([\*\-\+]|\d+\.)\s+/gm, options.listUnicodeChar + " $1")
-      else output = output.replace(/^([\s\t]*)([\*\-\+]|\d+\.)\s+/gm, "$1")
-    }
-    if (options.gfm) {
-      output = output
-        .replace(/\n={2,}/g, "\n")
-        .replace(/~{3}.*\n/g, "")
-        .replace(/~~/g, "")
-        .replace(/`{3}.*\n/g, "")
-    }
-    if (options.preserveLinks) {
-      output = output.replace(/\[(.*?)\][\[\(](.*?)[\]\)]/g, "$1 ($2)")
-    }
-    output = output
-      .replace(/<[^>]*>/g, "")
-      .replace(/^[=\-]{2,}\s*$/g, "")
-      .replace(/\[\^.+?\](\: .*?$)?/g, "")
-      .replace(/(#{1,6})\s+(.+)\1?/g, "<b>$2</b>")
-      .replace(/\s{0,2}\[.*?\]: .*?$/g, "")
-      .replace(/\!\[(.*?)\][\[\(].*?[\]\)]/g, options.useImgAltText ? "$1" : "")
-      .replace(/\[(.*?)\][\[\(].*?[\]\)]/g, "<a>$1</a>")
-      .replace(/!?\[\[\S[^\[\]\|]*(?:\|([^\[\]]*))?\S\]\]/g, "<a>$1</a>")
-      .replace(/^\s{0,3}>\s?/g, "")
-      .replace(/(^|\n)\s{0,3}>\s?/g, "\n\n")
-      .replace(/^\s{1,2}\[(.*?)\]: (\S+)( ".*?")?\s*$/g, "")
-      .replace(/([\*_]{1,3})(\S.*?\S{0,1})\1/g, "$2")
-      .replace(/([\*_]{1,3})(\S.*?\S{0,1})\1/g, "$2")
-      .replace(/(`{3,})(.*?)\1/gm, "$2")
-      .replace(/`(.+?)`/g, "$1")
-      .replace(/\n{2,}/g, "\n\n")
-      .replace(/\[![a-zA-Z]+\][-\+]? /g, "")
-  } catch (e) {
-    console.error(e)
-    return markdown
-  }
-  return output
-}
-// -----
-
-const highlight = (content, term) => {
-  const highlightWindow = 20
-
-  // try to find direct match first
-  const directMatchIdx = content.indexOf(term)
-  if (directMatchIdx !== -1) {
-    const h = highlightWindow / 2
-    const before = content.substring(0, directMatchIdx).split(" ").slice(-h)
-    const after = content
-      .substring(directMatchIdx + term.length, content.length - 1)
-      .split(" ")
-      .slice(0, h)
-    return (
-      (before.length == h ? `...${before.join(" ")}` : before.join(" ")) +
-      `<span class="search-highlight">${term}</span>` +
-      after.join(" ")
-    )
-  }
-
-  const tokenizedTerm = term.split(/\s+/).filter((t) => t !== "")
-  const splitText = content.split(/\s+/).filter((t) => t !== "")
-  const includesCheck = (token) =>
-    tokenizedTerm.some((term) => token.toLowerCase().startsWith(term.toLowerCase()))
-
-  const occurrencesIndices = splitText.map(includesCheck)
-
-  // calculate best index
-  let bestSum = 0
-  let bestIndex = 0
-  for (let i = 0; i < Math.max(occurrencesIndices.length - highlightWindow, 0); i++) {
-    const window = occurrencesIndices.slice(i, i + highlightWindow)
-    const windowSum = window.reduce((total, cur) => total + cur, 0)
-    if (windowSum >= bestSum) {
-      bestSum = windowSum
-      bestIndex = i
-    }
-  }
-
-  const startIndex = Math.max(bestIndex - highlightWindow, 0)
-  const endIndex = Math.min(startIndex + 2 * highlightWindow, splitText.length)
-  const mappedText = splitText
-    .slice(startIndex, endIndex)
-    .map((token) => {
-      if (includesCheck(token)) {
-        return `<span class="search-highlight">${token}</span>`
-      }
-      return token
-    })
-    .join(" ")
-    .replaceAll('</span> <span class="search-highlight">', " ")
-  return `${startIndex === 0 ? "" : "..."}${mappedText}${
-    endIndex === splitText.length ? "" : "..."
-  }`
-}
-
-;(async function () {
   const encoder = (str) => str.toLowerCase().split(/([^a-z]|[^\x00-\x7F])+/)
   const contentIndex = new FlexSearch.Document({
     cache: true,
@@ -138,25 +27,6 @@ const highlight = (content, term) => {
     })
   }
 
-  const resultToHTML = ({ url, title, content, term }) => {
-    const text = removeMarkdown(content)
-    const resultTitle = highlight(title, term)
-    const resultText = highlight(text, term)
-    return `<button class="result-card" id="${url}">
-        <h3>${resultTitle}</h3>
-        <p>${resultText}</p>
-    </button>`
-  }
-
-  const redir = (id, term) => {
-    // SPA navigation
-    window.Million.navigate(
-      new URL(`${BASE_URL.replace(/\/$/g, "")}${id}#:~:text=${encodeURIComponent(term)}/`),
-      ".singlePage",
-    )
-    closeSearch()
-  }
-
   const formatForDisplay = (id) => ({
     id,
     url: id,
@@ -164,16 +34,7 @@ const highlight = (content, term) => {
     content: content[id].content,
   })
 
-  const source = document.getElementById("search-bar")
+  registerHandlers((e) => {
-  const results = document.getElementById("results-container")
-  let term
-  source.addEventListener("keyup", (e) => {
-    if (e.key === "Enter") {
-      const anchor = document.getElementsByClassName("result-card")[0]
-      redir(anchor.id, term)
-    }
-  })
-  source.addEventListener("input", (e) => {
     term = e.target.value
     const searchResults = contentIndex.search(term, [
       {
@@ -195,68 +56,6 @@ const highlight = (content, term) => {
     }
     const allIds = new Set([...getByField("title"), ...getByField("content")])
     const finalResults = [...allIds].map(formatForDisplay)
-
+    displayResults(finalResults)
-    // display
-    if (finalResults.length === 0) {
-      results.innerHTML = `<button class="result-card">
-                    <h3>No results.</h3>
-                    <p>Try another search term?</p>
-                </button>`
-    } else {
-      results.innerHTML = finalResults
-        .map((result) =>
-          resultToHTML({
-            ...result,
-            term,
-          }),
-        )
-        .join("\n")
-      const anchors = [...document.getElementsByClassName("result-card")]
-      anchors.forEach((anchor) => {
-        anchor.onclick = () => redir(anchor.id, term)
-      })
-    }
-  })
-
-  const searchContainer = document.getElementById("search-container")
-
-  function openSearch() {
-    if (searchContainer.style.display === "none" || searchContainer.style.display === "") {
-      source.value = ""
-      results.innerHTML = ""
-      searchContainer.style.display = "block"
-      source.focus()
-    } else {
-      searchContainer.style.display = "none"
-    }
-  }
-
-  function closeSearch() {
-    searchContainer.style.display = "none"
-  }
-
-  document.addEventListener("keydown", (event) => {
-    if (event.key === "k" && (event.ctrlKey || event.metaKey)) {
-      event.preventDefault()
-      openSearch()
-    }
-    if (event.key === "Escape") {
-      event.preventDefault()
-      closeSearch()
-    }
-  })
-
-  const searchButton = document.getElementById("search-icon")
-  searchButton.addEventListener("click", (evt) => {
-    openSearch()
-  })
-  searchButton.addEventListener("keydown", (evt) => {
-    openSearch()
-  })
-  searchContainer.addEventListener("click", (evt) => {
-    closeSearch()
-  })
-  document.getElementById("search-space").addEventListener("click", (evt) => {
-    evt.stopPropagation()
   })
 })()

assets/js/util.js

@@ -0,0 +1,207 @@
+// code from https://github.com/danestves/markdown-to-text
+const removeMarkdown = (
+  markdown,
+  options = {
+    listUnicodeChar: false,
+    stripListLeaders: true,
+    gfm: true,
+    useImgAltText: false,
+    preserveLinks: false,
+  },
+) => {
+  let output = markdown || ""
+  output = output.replace(/^(-\s*?|\*\s*?|_\s*?){3,}\s*$/gm, "")
+
+  try {
+    if (options.stripListLeaders) {
+      if (options.listUnicodeChar)
+        output = output.replace(/^([\s\t]*)([\*\-\+]|\d+\.)\s+/gm, options.listUnicodeChar + " $1")
+      else output = output.replace(/^([\s\t]*)([\*\-\+]|\d+\.)\s+/gm, "$1")
+    }
+    if (options.gfm) {
+      output = output
+        .replace(/\n={2,}/g, "\n")
+        .replace(/~{3}.*\n/g, "")
+        .replace(/~~/g, "")
+        .replace(/`{3}.*\n/g, "")
+    }
+    if (options.preserveLinks) {
+      output = output.replace(/\[(.*?)\][\[\(](.*?)[\]\)]/g, "$1 ($2)")
+    }
+    output = output
+      .replace(/<[^>]*>/g, "")
+      .replace(/^[=\-]{2,}\s*$/g, "")
+      .replace(/\[\^.+?\](\: .*?$)?/g, "")
+      .replace(/(#{1,6})\s+(.+)\1?/g, "<b>$2</b>")
+      .replace(/\s{0,2}\[.*?\]: .*?$/g, "")
+      .replace(/\!\[(.*?)\][\[\(].*?[\]\)]/g, options.useImgAltText ? "$1" : "")
+      .replace(/\[(.*?)\][\[\(].*?[\]\)]/g, "<a>$1</a>")
+      .replace(/!?\[\[\S[^\[\]\|]*(?:\|([^\[\]]*))?\S\]\]/g, "<a>$1</a>")
+      .replace(/^\s{0,3}>\s?/g, "")
+      .replace(/(^|\n)\s{0,3}>\s?/g, "\n\n")
+      .replace(/^\s{1,2}\[(.*?)\]: (\S+)( ".*?")?\s*$/g, "")
+      .replace(/([\*_]{1,3})(\S.*?\S{0,1})\1/g, "$2")
+      .replace(/([\*_]{1,3})(\S.*?\S{0,1})\1/g, "$2")
+      .replace(/(`{3,})(.*?)\1/gm, "$2")
+      .replace(/`(.+?)`/g, "$1")
+      .replace(/\n{2,}/g, "\n\n")
+      .replace(/\[![a-zA-Z]+\][-\+]? /g, "")
+  } catch (e) {
+    console.error(e)
+    return markdown
+  }
+  return output
+}
+
+const highlight = (content, term) => {
+  const highlightWindow = 20
+
+  // try to find direct match first
+  const directMatchIdx = content.indexOf(term)
+  if (directMatchIdx !== -1) {
+    const h = highlightWindow / 2
+    const before = content.substring(0, directMatchIdx).split(" ").slice(-h)
+    const after = content
+      .substring(directMatchIdx + term.length, content.length - 1)
+      .split(" ")
+      .slice(0, h)
+    return (
+      (before.length == h ? `...${before.join(" ")}` : before.join(" ")) +
+      `<span class="search-highlight">${term}</span>` +
+      after.join(" ")
+    )
+  }
+
+  const tokenizedTerm = term.split(/\s+/).filter((t) => t !== "")
+  const splitText = content.split(/\s+/).filter((t) => t !== "")
+  const includesCheck = (token) =>
+    tokenizedTerm.some((term) => token.toLowerCase().startsWith(term.toLowerCase()))
+
+  const occurrencesIndices = splitText.map(includesCheck)
+
+  // calculate best index
+  let bestSum = 0
+  let bestIndex = 0
+  for (let i = 0; i < Math.max(occurrencesIndices.length - highlightWindow, 0); i++) {
+    const window = occurrencesIndices.slice(i, i + highlightWindow)
+    const windowSum = window.reduce((total, cur) => total + cur, 0)
+    if (windowSum >= bestSum) {
+      bestSum = windowSum
+      bestIndex = i
+    }
+  }
+
+  const startIndex = Math.max(bestIndex - highlightWindow, 0)
+  const endIndex = Math.min(startIndex + 2 * highlightWindow, splitText.length)
+  const mappedText = splitText
+    .slice(startIndex, endIndex)
+    .map((token) => {
+      if (includesCheck(token)) {
+        return `<span class="search-highlight">${token}</span>`
+      }
+      return token
+    })
+    .join(" ")
+    .replaceAll('</span> <span class="search-highlight">', " ")
+  return `${startIndex === 0 ? "" : "..."}${mappedText}${endIndex === splitText.length ? "" : "..."
+    }`
+}
+
+// Common utilities for search
+const resultToHTML = ({ url, title, content, term }) => {
+  const text = removeMarkdown(content)
+  const resultTitle = highlight(title, term)
+  const resultText = highlight(text, term)
+  return `<button class="result-card" id="${url}">
+      <h3>${resultTitle}</h3>
+      <p>${resultText}</p>
+  </button>`
+}
+
+const redir = (id, term) => {
+  // SPA navigation
+  window.Million.navigate(
+    new URL(`${BASE_URL.replace(/\/$/g, "")}${id}#:~:text=${encodeURIComponent(term)}/`),
+    ".singlePage",
+  )
+  closeSearch()
+}
+
+function openSearch() {
+  const source = document.getElementById("search-bar")
+  const results = document.getElementById("results-container")
+  const searchContainer = document.getElementById("search-container")
+  if (searchContainer.style.display === "none" || searchContainer.style.display === "") {
+    source.value = ""
+    results.innerHTML = ""
+    searchContainer.style.display = "block"
+    source.focus()
+  } else {
+    searchContainer.style.display = "none"
+  }
+}
+
+function closeSearch() {
+  const searchContainer = document.getElementById("search-container")
+  searchContainer.style.display = "none"
+}
+
+const registerHandlers = (onInputFn) => {
+  const source = document.getElementById("search-bar")
+  const searchContainer = document.getElementById("search-container")
+  let term
+  source.addEventListener("keyup", (e) => {
+    if (e.key === "Enter") {
+      const anchor = document.getElementsByClassName("result-card")[0]
+      redir(anchor.id, term)
+    }
+  })
+  source.addEventListener("input", onInputFn)
+  document.addEventListener("keydown", (event) => {
+    if (event.key === "k" && (event.ctrlKey || event.metaKey)) {
+      event.preventDefault()
+      openSearch()
+    }
+    if (event.key === "Escape") {
+      event.preventDefault()
+      closeSearch()
+    }
+  })
+
+  const searchButton = document.getElementById("search-icon")
+  searchButton.addEventListener("click", (_) => {
+    openSearch()
+  })
+  searchButton.addEventListener("keydown", (_) => {
+    openSearch()
+  })
+  searchContainer.addEventListener("click", (_) => {
+    closeSearch()
+  })
+  document.getElementById("search-space").addEventListener("click", (evt) => {
+    evt.stopPropagation()
+  })
+}
+
+const displayResults = (finalResults) => {
+  const results = document.getElementById("results-container")
+  if (finalResults.length === 0) {
+    results.innerHTML = `<button class="result-card">
+                    <h3>No results.</h3>
+                    <p>Try another search term?</p>
+                </button>`
+  } else {
+    results.innerHTML = finalResults
+      .map((result) =>
+        resultToHTML({
+          ...result,
+          term,
+        }),
+      )
+      .join("\n")
+    const anchors = [...document.getElementsByClassName("result-card")]
+    anchors.forEach((anchor) => {
+      anchor.onclick = () => redir(anchor.id, term)
+    })
+  }
+}

layouts/partials/head.html

@@ -40,10 +40,13 @@
   <link href="{{$lightSyntax.Permalink}}" rel="stylesheet" id="theme-link">
 
    <!-- Base scripts -->
-  {{ $darkMode := resources.Get "js/darkmode.js" | resources.ExecuteAsTemplate "js/darkmode.js" . | resources.Fingerprint "md5" | resources.Minify }}
+  {{$scripts := (slice "js/darkmode.js" "js/util.js")}}
-  <script src="{{$darkMode.Permalink}}"></script>
+  {{range $scripts}}
+  {{$scriptname := .}}
+  {{ $s := resources.Get $scriptname | resources.ExecuteAsTemplate $scriptname . | resources.Fingerprint "md5" | resources.Minify }}
+  <script src="{{$s.Permalink}}"></script>
+  {{end}}
   {{partial "katex.html" .}}
-
     
   <script src="https://unpkg.com/@floating-ui/core@0.7.3"></script>
   <script src="https://unpkg.com/@floating-ui/dom@0.5.4"></script>

layouts/partials/search.html

@@ -1,10 +1,12 @@
 <div id="search-container">
-    <div id="search-space">
+  <div id="search-space">
-        <input autocomplete="off" id="search-bar" name="search" type="text" aria-label="Search" placeholder="Search for something...">
+    <input autocomplete="off" id="search-bar" name="search" type="text" aria-label="Search"
-        <div id="results-container">
+      placeholder="Search for something...">
-        </div>
+    <div id="results-container">
     </div>
+  </div>
 </div>
-<script src="https://cdn.jsdelivr.net/npm/flexsearch@0.7.21/dist/flexsearch.bundle.js" integrity="sha256-i3A0NZGkhsKjVMzFxv3ksk0DZh3aXqu0l49Bbh0MdjE=" crossorigin="anonymous" defer></script>
+<script src="https://cdn.jsdelivr.net/npm/flexsearch@0.7.21/dist/flexsearch.bundle.js"
-{{ $js := resources.Get "js/search.js" |  resources.Fingerprint "md5" | resources.Minify }}
+  integrity="sha256-i3A0NZGkhsKjVMzFxv3ksk0DZh3aXqu0l49Bbh0MdjE=" crossorigin="anonymous" defer></script>
+{{ $js := resources.Get "js/search.js" | resources.Fingerprint "md5" | resources.Minify }}
 <script defer src="{{ $js.Permalink }}"></script>