Automated Lecture Note link generation in the homepage.

README.md

@@ -13,7 +13,7 @@ Yes. Consider sharing it with your classmates ;)
 Here's a quick rundown of how to build from source:
 1) download or clone the repository ```git clone https://git.sasserisop.com/Sasserisop/MATH201```
 2) make sure you have hugo installed
-3) if you are using localhost, inside of themes/zettels/assets/js/search.js set 'const localhost' to false.
+3) if you are using localhost, inside of themes/zettels/assets/js/search.js set 'const localhost' to true.
 4) open a command prompt in the MATH201/ directory and run the command ```hugo server --disableFastRender```
 5) visit your site by opening http://localhost:1313 on your browser.
 

content/_index.md

@@ -5,32 +5,6 @@ I have written these notes for myself, I thought it would be cool to share them.
 Good luck on the final! <3
 If we do bad on the exam, Petar will come after us with the Dirac delta 🤜💥
 </br>
-[Separable equations (lec 1)](separable-equations-lec-1.html)
-[Homogenous equations (lec 2)](homogenous-equations-lec-2.html)
-[Linear equations (lec 2-3)](linear-equations-lec-2-3.html)
-[Bernoulli equations (lec 3)](bernoulli-equations-lec-3.html)
-[Linear coefficient equations (lec 4)](linear-coefficient-equations-lec-4.html)
-[Exact equations (lec 4-5)](exact-equations-lec-4-5.html)
-[Second order homogenous linear equations (lec 5-7)](second-order-homogenous-linear-equations-lec-5-7.html) 
-[Method of undetermined coefficients (lec 8-9)](method-of-undetermined-coefficients-lec-8-9.html)
-[Variation of parameters (lec 9-10)](variation-of-parameters-lec-9-10.html) 
-[Cauchy-Euler equations (lec 10-11)](cauchy-euler-equations-lec-10-11.html)
-[Reduction of order (lec 11)](reduction-of-order-lec-11.html)
-[Free vibrations (lec 11-12)](free-vibrations-lec-11-12.html) 
-[Resonance & AM (lec 13-14)](resonance-am-lec-13-14.html)
-[Laplace transform (lec 14-16)](laplace-transform-lec-14-16.html)
-[Solving IVP's using Laplace transform (lec 17-18)](solving-ivps-using-laplace-transform-lec-17-18.html)
-[(Heaviside) Unit step function (lec 18)](heaviside-unit-step-function-lec-18.html)
-[Periodic functions (lec 19)](periodic-functions-lec-19.html)
-[Convolution (lec 19-20)](convolution-lec-19-20.html)
-[Dirak δ-function (lec 21)](dirak-δ-function-lec-21.html)
-[Systems of linear equations (lec 21-22)](systems-of-linear-equations-lec-21-22.html)
-[Power series (lec 22-25)](power-series-lec-22-25.html)
-[Separation of variables & Eigen value problems (lec 26-28)](separation-of-variables-eigen-value-problems-lec-26-28.html)
-[Fourier series (lec 28-29)](fourier-series-lec-28-29.html)
-[Heat equation (lec 30-33)](heat-equation-lec-30-33.html)
-[Wave equation (lec 33-36)](wave-equation-lec-33-36.html)
-
 </br>
 [How to solve any DE, a flow chart](Solve-any-DE.png) (Last updated Oct 1st, needs revision. But it gives a nice overview.)
 [Big LT table (.png)](drawings/bigLTtable.png)

themes/zettels/assets/js/search.js

@@ -1,6 +1,8 @@
 // On localhost the root url is /MATH201 
 // On sasserisop the root url is /sasserisop
 const localhost = true;
+const root = localhost ? "" : "/MATH201";
+
 loadIndex()
 
 // Highlight with jQuery
@@ -149,8 +151,47 @@ document.addEventListener("turbolinks:load", function () {
 	}
 })
 
+// load the lecture note links in homepage
+function load_lecture_links() {
+	// check if links have already been generated first
+	if ($("p.lecture-link").length == 0) {
+		fetchJSON(function (response) {
+			const notes = response;
+			// for homepage lecture links
+			const lecture_links = new Map();
+
+			notes.index.filter(n => !/^Drawing|^20/.test(n.title)).forEach(note => {
+				// Add lecture notes to a dictionary, and then sort them by lecture number.
+				// second last character of the title may be first digit of lecture number
+				const d1 = note.title[note.title.length - 2];
+				// find the lecture number, if there is one
+				if (/\d/.test(d1)) {
+					// it has a lecture number
+					// if the third last character is a digit, then the lecture number is 2 digits
+					const d2 = note.title[note.title.length - 3];
+					var lecture_number = /\d/.test(d2) ? Number(d2 + d1) : Number(d1);
+					// some lecture titles have the same last lecture number
+					if (lecture_links.has(lecture_number)) {
+						// prevents two lectures from having the same key
+						lecture_number += 0.5;
+					}
+					lecture_links.set(lecture_number, [note.title, note.permalink])
+				}
+			});
+			const sorted_links = new Map([...lecture_links.entries()].sort((a, b) => (a[0] - b[0])));
+			sorted_links.forEach(val => {
+				a_tag = document.createElement('a');
+				a_tag.innerText = val[0];
+				a_tag.href = val[1];
+				p_tag = document.createElement('p');
+				p_tag.append(a_tag);
+				p_tag.className = "lecture-link"
+				$("#note-wrapper br:nth-of-type(3)").before(p_tag);
+			});
+		}, root);
+	}
+}
 function loadIndex() {
-	const root = localhost ? "" : "/MATH201";
 
 	fetchJSON(function (response) {
 		const notes = response;
@@ -203,7 +244,11 @@ function loadIndex() {
 				// it has a lecture number
 				// if the third last character is a digit, then the lecture number is 2 digits
 				const d2 = note.title[note.title.length - 3];
-				const lecture_number = /\d/.test(d2) ? Number(d2 + d1) : Number(d1);
+				var lecture_number = /\d/.test(d2) ? Number(d2 + d1) : Number(d1);
+				if (lecture_notes.has(lecture_number)) {
+					// prevent lectures from having the same key
+					lecture_number += 0.5;
+				}
 				lecture_notes.set(lecture_number, child);
 			} else {
 				non_lecture_notes.push(child);
@@ -211,13 +256,14 @@ function loadIndex() {
 		});
 		// sort notes by lecture number
 		const sorted_notes = new Map([...lecture_notes.entries()].sort((a, b) => (a[0] - b[0])));
+
 		// Add sorted notes first
 		sorted_notes.forEach(val => {
 			search_results.append(val);
 		});
 		non_lecture_notes.forEach(child => {
 			search_results.append(child);
-		})
+		});
 
 		// @todo: wip
 		// notes.tags.forEach(tag => {

themes/zettels/layouts/index.html

@@ -1,7 +1,14 @@
 {{ define "main" }}
-	<p style="text-align: center;"><a href="http://sasserisop.com">Back to Sasserisop homepage</a></p>
-	{{ partial "content.html" . }}
-	<p style="font-size:25pt;">❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦</p></br>
-	<p style="text-align: left;"><a href="https://git.sasserisop.com/Sasserisop/MATH201/src/branch/master">Gitea repository <img style="vertical-align: middle;" border="0" src="gitea-logo.svg" width="35" height="35"></a></p></br>
-	<p style="text-align: left;"><a href="https://discord.gg/G3DWjgvP3A" target="_blank" rel="noopener noreferrer">Community discord <img style="vertical-align: middle;" border="0" src="discord-logo.svg" width="35" height="35"></a></p>
-{{ end }}
+<p style="text-align: center;"><a href="http://sasserisop.com">Back to Sasserisop homepage</a></p>
+{{ partial "content.html" . }}
+<p style="font-size:25pt;">❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦ ❦</p></br>
+<p style="text-align: left;"><a href="https://git.sasserisop.com/Sasserisop/MATH201/src/branch/master">Gitea repository
+		<img style="vertical-align: middle;" border="0" src="gitea-logo.svg" width="35" height="35"></a></p></br>
+<p style="text-align: left;"><a href="https://discord.gg/G3DWjgvP3A" target="_blank" rel="noopener noreferrer">Community
+		discord <img style="vertical-align: middle;" border="0" src="discord-logo.svg" width="35" height="35"></a></p>
+<script>
+	$(function () {
+		load_lecture_links();
+	});
+</script>
+{{ end }}

themes/zettels/layouts/partials/search.html

@@ -33,10 +33,8 @@
 	}
 
 	#search-header {
-		padding: 12px;
-		position: fixed;
-		padding-left: 12px;
-		padding-right: 12px;
+		padding: 12px 0;
+		margin: 0 auto;
 		background: var(--background-search);
 		width: 250px;
 		opacity: 1;
@@ -78,7 +76,6 @@
 	}
 
 	#search-results {
-		margin-top: 50px;
 		overflow: auto;
 		height: 100%;
 	}