From 78322220be2655e6360500da4e40a6c21b14a421 Mon Sep 17 00:00:00 2001
From: tiennm99 <tiennm99@outlook.com>
Date: Sat, 30 Nov 2024 20:50:31 +0700
Subject: [PATCH] [Add] search (WIP)

---
 config.yml                   |   6 ++
 content/search.md            |  51 +++++++++++++++++
 layouts/_default/index.json  |   5 ++
 layouts/_default/search.html |  27 +++++++++
 static/js/search.js          | 108 +++++++++++++++++++++++++++++++++++
 5 files changed, 197 insertions(+)
 create mode 100644 content/search.md
 create mode 100644 layouts/_default/index.json
 create mode 100644 layouts/_default/search.html
 create mode 100644 static/js/search.js

diff --git a/config.yml b/config.yml
index 1bf77d1..1d403ed 100644
--- a/config.yml
+++ b/config.yml
@@ -112,3 +112,9 @@ languages:
           url: https://tiennm99.github.io/webcv
         - name: PDF CV
           url: https://tiennm99.github.io/cv/miti99.pdf
+
+outputs:
+  home:
+    - html
+    - rss
+    - json
diff --git a/content/search.md b/content/search.md
new file mode 100644
index 0000000..9f30562
--- /dev/null
+++ b/content/search.md
@@ -0,0 +1,51 @@
+---
+title: "Search Results"
+sitemap:
+  priority : 0.1
+layout: "search"
+---
+
+
+This file exists solely to respond to /search URL with the related `search` layout template.
+
+No content shown here is rendered, all content is based in the template layouts/page/search.html
+
+Setting a very low sitemap priority will tell search engines this is not important content.
+
+This implementation uses Fusejs, jquery and mark.js
+
+
+## Initial setup
+
+Search  depends on additional output content type of JSON in config.toml
+\```
+[outputs]
+  home = ["HTML", "JSON"]
+\```
+
+## Searching additional fileds
+
+To search additional fields defined in front matter, you must add it in 2 places.
+
+### Edit layouts/_default/index.JSON
+This exposes the values in /index.json
+i.e. add `category`
+\```
+...
+  "contents":{{ .Content | plainify | jsonify }}
+  {{ if .Params.tags }},
+  "tags":{{ .Params.tags | jsonify }}{{end}},
+  "categories" : {{ .Params.categories | jsonify }},
+...
+\```
+
+### Edit fuse.js options to Search
+`static/js/search.js`
+\```
+keys: [
+  "title",
+  "contents",
+  "tags",
+  "categories"
+]
+\```
diff --git a/layouts/_default/index.json b/layouts/_default/index.json
new file mode 100644
index 0000000..c93f805
--- /dev/null
+++ b/layouts/_default/index.json
@@ -0,0 +1,5 @@
+{{- $.Scratch.Add "index" slice -}}
+{{- range .Site.RegularPages -}}
+    {{- $.Scratch.Add "index" (dict "title" .Title "tags" .Params.tags "categories" .Params.categories "contents" .Plain "permalink" .Permalink) -}}
+{{- end -}}
+{{- $.Scratch.Get "index" | jsonify -}}
diff --git a/layouts/_default/search.html b/layouts/_default/search.html
new file mode 100644
index 0000000..daa85e3
--- /dev/null
+++ b/layouts/_default/search.html
@@ -0,0 +1,27 @@
+{{ define "footerfiles" }}
+<script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/fuse.js/3.2.0/fuse.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/mark.js/8.11.1/jquery.mark.min.js"></script>
+<script src="{{ "js/search.js" | absURL }}"></script>
+{{ end }}
+{{ define "main" }}
+<section class="resume-section p-3 p-lg-5 d-flex flex-column">
+  <div class="my-auto" >
+    <form action="{{ "search" | absURL }}">
+      <input id="search-query" name="s"/>
+    </form>
+    <div id="search-results">
+     <h3>Matching pages</h3>
+    </div>
+  </div>
+</section>
+<!-- this template is sucked in by search.js and appended to the search-results div above. So editing here will adjust style -->
+<script id="search-result-template" type="text/x-js-template">
+    <div id="summary-${key}">
+      <h4><a href="${link}">${title}</a></h4>
+      <p>${snippet}</p>
+      ${ isset tags }<p>Tags: ${tags}</p>${ end }
+      ${ isset categories }<p>Categories: ${categories}</p>${ end }
+    </div>
+</script>
+{{ end }}
diff --git a/static/js/search.js b/static/js/search.js
new file mode 100644
index 0000000..add8549
--- /dev/null
+++ b/static/js/search.js
@@ -0,0 +1,108 @@
+summaryInclude=60;
+var fuseOptions = {
+  shouldSort: true,
+  includeMatches: true,
+  threshold: 0.0,
+  tokenize:true,
+  location: 0,
+  distance: 100,
+  maxPatternLength: 32,
+  minMatchCharLength: 1,
+  keys: [
+    {name:"title",weight:0.8},
+    {name:"contents",weight:0.5},
+    {name:"tags",weight:0.3},
+    {name:"categories",weight:0.3}
+  ]
+};
+
+
+var searchQuery = param("s");
+if(searchQuery){
+  $("#search-query").val(searchQuery);
+  executeSearch(searchQuery);
+}else {
+  $('#search-results').append("<p>Please enter a word or phrase above</p>");
+}
+
+
+
+function executeSearch(searchQuery){
+  $.getJSON( "/index.json", function( data ) {
+    var pages = data;
+    var fuse = new Fuse(pages, fuseOptions);
+    var result = fuse.search(searchQuery);
+    console.log({"matches":result});
+    if(result.length > 0){
+      populateResults(result);
+    }else{
+      $('#search-results').append("<p>No matches found</p>");
+    }
+  });
+}
+
+function populateResults(result){
+  $.each(result,function(key,value){
+    var contents= value.item.contents;
+    var snippet = "";
+    var snippetHighlights=[];
+    var tags =[];
+    if( fuseOptions.tokenize ){
+      snippetHighlights.push(searchQuery);
+    }else{
+      $.each(value.matches,function(matchKey,mvalue){
+        if(mvalue.key == "tags" || mvalue.key == "categories" ){
+          snippetHighlights.push(mvalue.value);
+        }else if(mvalue.key == "contents"){
+          start = mvalue.indices[0][0]-summaryInclude>0?mvalue.indices[0][0]-summaryInclude:0;
+          end = mvalue.indices[0][1]+summaryInclude<contents.length?mvalue.indices[0][1]+summaryInclude:contents.length;
+          snippet += contents.substring(start,end);
+          snippetHighlights.push(mvalue.value.substring(mvalue.indices[0][0],mvalue.indices[0][1]-mvalue.indices[0][0]+1));
+        }
+      });
+    }
+
+    if(snippet.length<1){
+      snippet += contents.substring(0,summaryInclude*2);
+    }
+    //pull template from hugo templarte definition
+    var templateDefinition = $('#search-result-template').html();
+    //replace values
+    var output = render(templateDefinition,{key:key,title:value.item.title,link:value.item.permalink,tags:value.item.tags,categories:value.item.categories,snippet:snippet});
+    $('#search-results').append(output);
+
+    $.each(snippetHighlights,function(snipkey,snipvalue){
+      $("#summary-"+key).mark(snipvalue);
+    });
+
+  });
+}
+
+function param(name) {
+    return decodeURIComponent((location.search.split(name + '=')[1] || '').split('&')[0]).replace(/\+/g, ' ');
+}
+
+function render(templateString, data) {
+  var conditionalMatches,conditionalPattern,copy;
+  conditionalPattern = /\$\{\s*isset ([a-zA-Z]*) \s*\}(.*)\$\{\s*end\s*}/g;
+  //since loop below depends on re.lastInxdex, we use a copy to capture any manipulations whilst inside the loop
+  copy = templateString;
+  while ((conditionalMatches = conditionalPattern.exec(templateString)) !== null) {
+    if(data[conditionalMatches[1]]){
+      //valid key, remove conditionals, leave contents.
+      copy = copy.replace(conditionalMatches[0],conditionalMatches[2]);
+    }else{
+      //not valid, remove entire section
+      copy = copy.replace(conditionalMatches[0],'');
+    }
+  }
+  templateString = copy;
+  //now any conditionals removed we can do simple substitution
+  var key, find, re;
+  for (key in data) {
+    find = '\\$\\{\\s*' + key + '\\s*\\}';
+    re = new RegExp(find, 'g');
+    templateString = templateString.replace(re, data[key]);
+  }
+  return templateString;
+}