add js version rendering. still needs download

1 files changed, 53 insertions, 0 deletions

diff --git a/worker.js b/worker.js
new file mode 100644
index 0000000..77a861b
--- /dev/null
+++ b/worker.js
@@ -0,0 +1,53 @@
+import CSVParse from './csv.mjs';
+
+let ignoreLines = 0;
+let sequenceNames = [];
+
+function process(threshold, row) {
+    const name = row[0];
+    if (name === undefined || /^\s*$/.test(name)) {
+        return;
+    }
+    if (ignoreLines > 0) {
+        ignoreLines--;
+        return;
+    }
+    sequenceNames.push(name);
+
+    let i = 0;
+    for (const col of row) {
+        const val = Number(col);
+        if (isNaN(val)) {
+            continue;
+        }
+        if (val >= threshold && name !== sequenceNames[i]) {
+            postMessage([name, sequenceNames[i], val]);
+        }
+        i++;
+    }
+}
+
+onmessage = e => {
+    console.debug('got message', e);
+    console.debug('reading file');
+
+    console.debug('e.data', e.data);
+    const { ignoreHeader, threshold, file } = e.data;
+    console.debug('threshold', threshold, 'file', file);
+
+    const reader = new FileReader();
+    reader.onload = e => {
+        const parser = new CSVParse();
+        for (const c of e.target.result) {
+            parser.push(c);
+        }
+        if (ignoreHeader) {
+            ignoreLines = 1;
+        }
+        parser.results.forEach(row => process(threshold, row));
+    }
+    reader.progress = e => {
+        console.debug('reader.progress', e);
+    }
+    reader.readAsText(file);
+}