From a3f7d8b9484d14f36e34ce77d5f4b25405bcc01f Mon Sep 17 00:00:00 2001
From: Alex Shpak <alex-shpak@users.noreply.github.com>
Date: Wed, 17 Jul 2019 13:42:39 +0200
Subject: Improve search settings

---
 assets/book.scss      | 10 +++++-----
 assets/search-data.js |  6 +++---
 assets/search.js      | 45 +++++++++++++++++++++++++++++----------------
 3 files changed, 37 insertions(+), 24 deletions(-)

(limited to 'assets')

diff --git a/assets/book.scss b/assets/book.scss
index 08ae91e..86bcf84 100644
--- a/assets/book.scss
+++ b/assets/book.scss
@@ -139,20 +139,20 @@ ul.pagination {
 
 .book-search {
   #book-search-input {
+    opacity: .33;
+
     border: 0;
-    border-bottom: $padding-1 solid $gray-200;
+    border-bottom: $padding-1 solid $body-font-color;
     outline: none;
 
     padding: $padding-4 $padding-8 $padding-4 $padding-16 + $padding-4;
-    margin-bottom: $padding-4;
-
     width: 85%;
   
     background: url("svg/search.svg") left center no-repeat;
     background-size: $padding-16;
-  
+
     &:focus {
-      border-bottom-color: $body-font-color;
+      opacity: 1;
     }
   }
 
diff --git a/assets/search-data.js b/assets/search-data.js
index 5b015e4..53394e7 100644
--- a/assets/search-data.js
+++ b/assets/search-data.js
@@ -14,9 +14,9 @@
   window.bookSearch = {
     pages: pages,
     idx: lunr(function() { 
-      this.ref('idx');
-      this.field('title');
-      this.field('content');
+      this.ref("idx");
+      this.field("title", { boost: 10000 });
+      this.field("content");
 
       pages.forEach(this.add, this);
     }),
diff --git a/assets/search.js b/assets/search.js
index e29f183..edb81e9 100644
--- a/assets/search.js
+++ b/assets/search.js
@@ -6,14 +6,12 @@
   const dummy = document.querySelector("#book-search-dummy");
 
   input.addEventListener("focus", init);
+  input.addEventListener("keyup", search);
 
   function init() {
     loadScript("{{ "lunr.min.js" | relURL }}")
-    loadScript("{{ $searchData.RelPermalink }}", function() {
-      input.disabled = false;
-      input.addEventListener("keyup", search);
-      search();
-    });
+    loadScript("{{ $searchData.RelPermalink }}", search);
+
     input.removeEventListener("focus", init);
   }
 
@@ -22,19 +20,34 @@
       results.removeChild(results.firstChild);
     }
 
-    if (input.value) {
-      const hits = window.bookSearch.idx.search(`${input.value}*`);
-      hits.slice(0, 10).forEach(function(hit) {
-        const page = window.bookSearch.pages[hit.ref];
-        const li = dummy.querySelector("li").cloneNode(true),
-              a = li.querySelector("a");
-
-        a.href = page.href;
-        a.textContent = page.title;
+    if (!input.value || !window.bookSearch) {
+      return
+    }
 
-        results.appendChild(li);
+    const terms = lunr.tokenizer(input.value);
+    const searchHits = window.bookSearch.idx.query(function(query) {
+      query.term(terms, {
+        boost: 100,
       });
-    }
+      query.term(terms, {
+        boost: 10,
+        wildcard: lunr.Query.wildcard.LEADING | lunr.Query.wildcard.TRAILING,
+      });
+      query.term(terms, {
+        editDistance: 2
+      });
+    });
+
+    searchHits.slice(0, 10).forEach(function(hit) {
+      const page = window.bookSearch.pages[hit.ref];
+      const li = dummy.querySelector("li").cloneNode(true),
+            a = li.querySelector("a");
+
+      a.href = page.href;
+      a.textContent = page.title;
+
+      results.appendChild(li);
+    });
   }
 
   function loadScript(src, callback) {
-- 
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