1 files changed, 126 insertions, 0 deletions
diff --git a/src/util/wiki-data.js b/src/util/wiki-data.js
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--- /dev/null
+++ b/src/util/wiki-data.js
@@ -0,0 +1,126 @@
+// Utility functions for interacting with wiki data.
+
+// Generic value operations
+
+export function getKebabCase(name) {
+    return name
+        .split(' ')
+        .join('-')
+        .replace(/&/g, 'and')
+        .replace(/[^a-zA-Z0-9\-]/g, '')
+        .replace(/-{2,}/g, '-')
+        .replace(/^-+|-+$/g, '')
+        .toLowerCase();
+}
+
+export function chunkByConditions(array, conditions) {
+    if (array.length === 0) {
+        return [];
+    } else if (conditions.length === 0) {
+        return [array];
+    }
+
+    const out = [];
+    let cur = [array[0]];
+    for (let i = 1; i < array.length; i++) {
+        const item = array[i];
+        const prev = array[i - 1];
+        let chunk = false;
+        for (const condition of conditions) {
+            if (condition(item, prev)) {
+                chunk = true;
+                break;
+            }
+        }
+        if (chunk) {
+            out.push(cur);
+            cur = [item];
+        } else {
+            cur.push(item);
+        }
+    }
+    out.push(cur);
+    return out;
+}
+
+export function chunkByProperties(array, properties) {
+    return chunkByConditions(array, properties.map(p => (a, b) => {
+        if (a[p] instanceof Date && b[p] instanceof Date)
+            return +a[p] !== +b[p];
+
+        if (a[p] !== b[p]) return true;
+
+        // Not sure if this line is still necessary with the specific check for
+        // d8tes a8ove, 8ut, uh, keeping it anyway, just in case....?
+        if (a[p] != b[p]) return true;
+
+        return false;
+    }))
+        .map(chunk => ({
+            ...Object.fromEntries(properties.map(p => [p, chunk[0][p]])),
+            chunk
+        }));
+}
+
+// Sorting functions
+
+export function sortByName(a, b) {
+    let an = a.name.toLowerCase();
+    let bn = b.name.toLowerCase();
+    if (an.startsWith('the ')) an = an.slice(4);
+    if (bn.startsWith('the ')) bn = bn.slice(4);
+    return an < bn ? -1 : an > bn ? 1 : 0;
+}
+
+// This function was originally made to sort just al8um data, 8ut its exact
+// code works fine for sorting tracks too, so I made the varia8les and names
+// more general.
+export function sortByDate(data) {
+    // Just to 8e clear: sort is a mutating function! I only return the array
+    // 8ecause then you don't have to define it as a separate varia8le 8efore
+    // passing it into this function.
+    return data.sort((a, b) => a.date - b.date);
+}
+
+// Same details as the sortByDate, 8ut for covers~
+export function sortByArtDate(data) {
+    return data.sort((a, b) => (a.coverArtDate || a.date) - (b.coverArtDate || b.date));
+}
+
+// Specific data utilities
+
+// This gets all the track o8jects defined in every al8um, and sorts them 8y
+// date released. Generally, albumData will pro8a8ly already 8e sorted 8efore
+// you pass it to this function, 8ut individual tracks can have their own
+// original release d8, distinct from the al8um's d8. I allowed that 8ecause
+// in Homestuck, the first four Vol.'s were com8ined into one al8um really
+// early in the history of the 8andcamp, and I still want to use that as the
+// al8um listing (not the original four al8um listings), 8ut if I only did
+// that, all the tracks would 8e sorted as though they were released at the
+// same time as the compilation al8um - i.e, after some other al8ums (including
+// Vol.'s 5 and 6!) were released. That would mess with chronological listings
+// including tracks from multiple al8ums, like artist pages. So, to fix that,
+// I gave tracks an Original Date field, defaulting to the release date of the
+// al8um if not specified. Pretty reasona8le, I think! Oh, and this feature can
+// 8e used for other projects too, like if you wanted to have an al8um listing
+// compiling a 8unch of songs with radically different & interspersed release
+// d8s, 8ut still keep the al8um listing in a specific order, since that isn't
+// sorted 8y date.
+export function getAllTracks(albumData) {
+    return sortByDate(albumData.flatMap(album => album.tracks));
+}
+
+export function getArtistNumContributions(artist) {
+    return (
+        artist.tracks.asAny.length +
+        artist.albums.asCoverArtist.length +
+        (artist.flashes ? artist.flashes.asContributor.length : 0)
+    );
+}
+
+export function getArtistCommentary(artist, {justEverythingMan}) {
+    return justEverythingMan.filter(thing =>
+        (thing?.commentary
+            .replace(/<\/?b>/g, '')
+            .includes('<i>' + artist.name + ':</i>')));
+}