mai2: add tachi to tachi session bookmarklet

mai2/tachi/README.md

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+# maimai DX Tachi to Tachi
+
+This is a bookmarklet that will allow you to download data shown in the Web UI of Tachi into a `Batch-Manual` compatible form again.
+
+This can be handy if you want to download/save data from the MYT network if you are already in a Tachi instance that has integrations with it.
+
+# Scripts
+
+## `tachi_to_tachi_session.js`
+For a singular session. Choose the session to export and go to the `All Scores` tab
+Page: `https://my-tachi-instance.com/u/USERNAME/games/chunithm/Single/sessions/SESSION_ID`
+
+# Usage
+
+1. Copy the contents of the script you want to use
+2. Create a new bookmark and paste the full contents of the script into the URL section
+3. Navigate to the relevant score page as shown in the previous section
+4. Show as many scores as possible on a singular view, if you exceed the largest limit then repeat the steps above for the next page(s)

mai2/tachi/tachi_to_tachi_session.js

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+javascript:void(async function () {
+  function waitForRows() {
+    return new Promise((resolve) => {
+      const check = () => {
+        const rows = document.querySelectorAll("table tbody tr");
+        if (rows.length > 0) resolve(rows);
+        else setTimeout(check, 500);
+      };
+      check();
+    });
+  }
+
+  const difficultyMap = {
+    "DX Basic": "DX Basic",
+    "DX Advanced": "DX Advanced",
+    "DX Expert": "DX Expert",
+    "DX Master": "DX Master",
+    "DX Re:Master": "DX Re:Master"
+  };
+
+  const lampMap = {
+    "FAILED": "FAILED",
+    "CLEAR": "CLEAR",
+    "FULL COMBO": "FULL COMBO",
+    "FULL COMBO+": "FULL COMBO+",
+    "ALL PERFECT": "ALL PERFECT",
+    "ALL PERFECT+": "ALL PERFECT+"
+  };
+
+  const gradeList = ["D", "C", "B", "BB", "BBB", "A", "AA", "AAA", "S", "S+", "SS", "SS+", "SSS", "SSS+"];
+
+  const rows = await waitForRows();
+
+  const results = {
+    meta: {
+      game: "maimaidx",
+      playtype: "Single",
+      service: "Tachi to Tachi PB Export"
+    },
+    scores: []
+  };
+
+  for (let i = 0; i < rows.length; i++) {
+    const row = rows[i];
+    if (row.classList.contains("expandable-pseudo-row") || row.classList.contains("fake-row")) continue;
+
+    const cells = row.querySelectorAll("td");
+    if (cells.length < 9) continue;
+
+    const difficultyText = cells[0].innerText.split("\n")[0].trim();
+    const difficulty = Object.keys(difficultyMap).find(d => difficultyText.includes(d)) || difficultyText;
+
+    const titleAnchor = cells[2].querySelector("a");
+    const title = titleAnchor?.childNodes[0]?.textContent.trim() || "";
+    const artist = titleAnchor?.querySelector("small")?.textContent.trim() || "";
+
+    const percentText = cells[3].innerText.trim();
+    const percent = parseFloat(percentText.match(/([\d.]+)%/)?.[1]) || 0;
+    const grade = gradeList.find(g => percentText.includes(g)) || "D";
+
+    const judgmentSpans = cells[4].querySelectorAll("span");
+    const [pcrit, perfect, great, good, miss] = Array.from(judgmentSpans).map(span => parseInt(span.textContent.trim()));
+
+    const lampText = cells[5].innerText.trim();
+    const lamp = lampMap[lampText] || "FAILED";
+
+    const timeText = cells[7].querySelector("small")?.textContent?.trim();
+    let timeAchieved = null;
+    if (timeText) {
+      const parsed = new Date(timeText);
+      if (!isNaN(parsed)) {
+        timeAchieved = parsed.getTime();
+      }
+    }
+
+    const score = {
+      identifier: title,
+      artist,
+      difficulty,
+      percent,
+      lamp,
+      judgements: {
+        pcrit,
+        perfect,
+        great,
+        good,
+        miss
+      },
+      matchType: "songTitle",
+      timeAchieved: timeAchieved
+    };
+
+    results.scores.push(score);
+  }
+
+  const blob = new Blob([JSON.stringify(results, null, 2)], { type: "application/json" });
+  const url = URL.createObjectURL(blob);
+  const a = document.createElement("a");
+  a.href = url;
+  a.download = "maimaidx_session_scores.json";
+  document.body.appendChild(a);
+  a.click();
+  URL.revokeObjectURL(url);
+})();