Add some logic for articles

data/lang/articles/en/modes.master_ph.html

@@ -0,0 +1,45 @@
+Master PHANTASM is a unique mode of the Master modes,
+featuring several unique challenges other than plain 20G and invisible.  
+
+<h1>Sections</h1>
+
+Master PHANTASM consists of 9 sections.
+
+<h3>Section 1 - 0 ~ 11 points</h3>
+In this section, you are forced to clear 3 Techrashes in a row. <br>
+If you fail to meet this requirement, the game ends prematurely.
+
+<h3>Section 2 - 12 ~ 25 points</h3>
+In this section, the Z/S and J/L pieces' colors are swapped. <br>
+This makes it easier to mistake those pieces with its mirror.
+
+<h3>Section 3 - 26 ~ 42 points</h3>
+In this section, 10 lines of garbage appear. <br>
+This isn't your usual multiplayer cheese garbage; it's closer to the "Type B" kind of garbage. <br>
+Significantly less garbage blocks appear the lower your stack is when you enter this section. <br>
+If you enter this section without using hold up to this point, you get an extra life as a reward. <br>
+You are required to clear all 10 rows of garbage to continue.
+
+<h3>Section 4 - 42 ~ 62 points</h3>
+This section is a regular 20G + bone blocks section. The Hold mechanic is also disabled. Not much to say here.
+
+<h3>Section 5 - 62 ~ ?? points</h3>
+This section disables move-reset, making it harder to survive. The speed here is comparable to the middle stages of Master FINAL.
+
+<h3>Section 6 - ?? ~ ?? points</h3>
+The game speeds up significantly in this section. Not much else changes.
+
+<h3>Section 7 - ?? ~ ?? points</h3>
+The game speeds up even more in this section. <br>
+The Hold mechanic is re-enabled. <br>
+Placed blocks fade away slowly.
+
+<h3>Section 8 - ?? ~ ?? points</h3>
+The bone block mechanic is disabled in this section. <br>
+Placed blocks fade away faster.
+
+<h3>Section 9 - ?? ~ ?? points</h3>
+The pieces' colors are randomized upon entering this section. <br>
+Placed blocks fade away nearly instantly. <br>
+You have to clear 8 more Techrashes to finally finish the mode. <br>
+You don't have to clear the Techrashes in a row; unlike the first section, getting any other kind of line clear doesn't end the game prematurely.

js/lang.js

@@ -1,4 +1,5 @@
 let langEntries = {};
+let showdown;
 
 export function getCurrentLang() {
     return localStorage.getItem('lang') || 'en';
@@ -30,6 +31,22 @@ export function getModeFullName(mode) {
 export function getLanguageEntries() {
     return langEntries;
 };
+
+export async function getArticle(key, fallback) {
+    if(typeof key !== 'string') throw new Error("Key must be a string!");
+
+    const result = await fetch(`/data/lang/articles/${getCurrentLang()}/${key}.html`);
+
+    if(!result.ok) {
+        if(fallback === undefined) {
+            throw new Error(`Failed to fetch article ${key}`);
+        }
+        return fallback;
+    }
+
+    return await result.text();
+}
+
 export async function setLanguage(lang){
     if(lang === localStorage.getItem('lang')) return;
     if(typeof lang !== 'string') throw new Error("Language must be a string!");