ox_content_ssg 0.7.0

const toggle = document.querySelector(".menu-toggle"),
  sidebar = document.querySelector(".sidebar"),
  overlay = document.querySelector(".overlay")
if (toggle && sidebar && overlay) {
  const close = () => {
    sidebar.classList.remove("open")
    overlay.classList.remove("open")
  }
  toggle.addEventListener("click", () => {
    sidebar.classList.toggle("open")
    overlay.classList.toggle("open")
  })
  overlay.addEventListener("click", close)
  sidebar
    .querySelectorAll("a")
    .forEach((a) => a.addEventListener("click", close))
}
if (sidebar) {
  const savedPos = sessionStorage.getItem("sidebarScroll")
  if (savedPos) sidebar.scrollTop = parseInt(savedPos, 10)
  sidebar.addEventListener("scroll", () =>
    sessionStorage.setItem("sidebarScroll", sidebar.scrollTop),
  )
}
const themeToggle = document.querySelector(".theme-toggle"),
  setTheme = (t) => {
    document.documentElement.setAttribute("data-theme", t)
    localStorage.setItem("theme", t)
  },
  getTheme = () =>
    document.documentElement.getAttribute("data-theme") || "light"
themeToggle?.addEventListener("click", () =>
  setTheme(getTheme() === "dark" ? "light" : "dark"),
)
const searchBtn = document.querySelector(".search-button"),
  searchOverlay = document.querySelector(".search-modal-overlay"),
  searchInput = document.querySelector(".search-input"),
  searchResults = document.querySelector(".search-results"),
  searchClose = document.querySelector(".search-close")
let searchIndex = null,
  selectedIdx = 0,
  results = []
const openSearch = () => {
    searchOverlay.classList.add("open")
    searchInput.focus()
  },
  closeSearch = () => {
    searchOverlay.classList.remove("open")
    searchInput.value = ""
    searchResults.innerHTML = ""
    selectedIdx = 0
    results = []
  }
const loadIndex = async () => {
  if (searchIndex) return
  try {
    searchIndex = await (await fetch("{{base}}search-index.json")).json()
  } catch (e) {
    console.warn("Search index load failed:", e)
  }
}
const tokenize = (t) => {
  const r = []
  let c = ""
  for (const ch of t) {
    if (
      /[\u4E00-\u9FFF\u3400-\u4DBF\u3040-\u309F\u30A0-\u30FF\uAC00-\uD7AF]/.test(
        ch,
      )
    ) {
      if (c) {
        r.push(c.toLowerCase())
        c = ""
      }
      r.push(ch)
    } else if (/[a-zA-Z0-9_]/.test(ch)) c += ch
    else if (c) {
      r.push(c.toLowerCase())
      c = ""
    }
  }
  if (c) r.push(c.toLowerCase())
  return r
}
const search = async (q) => {
  if (!q.trim()) {
    searchResults.innerHTML = ""
    results = []
    return
  }
  await loadIndex()
  if (!searchIndex) {
    searchResults.innerHTML =
      '<div class="search-empty">Index unavailable</div>'
    return
  }
  const tokens = tokenize(q)
  if (!tokens.length) {
    searchResults.innerHTML = ""
    results = []
    return
  }
  const k1 = 1.2,
    b = 0.75,
    scores = new Map()
  for (let i = 0; i < tokens.length; i++) {
    const tok = tokens[i],
      isLast = i === tokens.length - 1
    let terms =
      isLast && tok.length >= 2
        ? Object.keys(searchIndex.index).filter((t) => t.startsWith(tok))
        : searchIndex.index[tok]
          ? [tok]
          : []
    for (const term of terms) {
      const posts = searchIndex.index[term] || [],
        df = searchIndex.df[term] || 1,
        idf = Math.log((searchIndex.doc_count - df + 0.5) / (df + 0.5) + 1)
      for (const p of posts) {
        const doc = searchIndex.documents[p.doc_idx]
        if (!doc) continue
        const boost = p.field === "Title" ? 10 : p.field === "Heading" ? 5 : 1,
          score =
            idf *
            ((p.tf * (k1 + 1)) /
              (p.tf +
                k1 * (1 - b + (b * doc.body.length) / searchIndex.avg_dl))) *
            boost
        if (!scores.has(p.doc_idx))
          scores.set(p.doc_idx, { score: 0, matches: new Set() })
        const e = scores.get(p.doc_idx)
        e.score += score
        e.matches.add(term)
      }
    }
  }
  results = Array.from(scores.entries())
    .map(([idx, d]) => {
      const doc = searchIndex.documents[idx]
      let snip = ""
      if (doc.body) {
        const bl = doc.body.toLowerCase()
        let fp = -1
        for (const m of d.matches) {
          const pos = bl.indexOf(m)
          if (pos !== -1 && (fp === -1 || pos < fp)) fp = pos
        }
        const st = Math.max(0, fp - 50),
          en = Math.min(doc.body.length, st + 150)
        snip = doc.body.slice(st, en)
        if (st > 0) snip = "..." + snip
        if (en < doc.body.length) snip += "..."
      }
      return { ...doc, score: d.score, snippet: snip }
    })
    .sort((a, b) => b.score - a.score)
    .slice(0, 10)
  selectedIdx = 0
  render()
}
const render = () => {
  if (!results.length) {
    searchResults.innerHTML = '<div class="search-empty">No results</div>'
    return
  }
  searchResults.innerHTML = results
    .map(
      (r, i) =>
        '<a href="' +
        r.url +
        '" class="search-result' +
        (i === selectedIdx ? " selected" : "") +
        '"><div class="search-result-title">' +
        r.title +
        "</div>" +
        (r.snippet
          ? '<div class="search-result-snippet">' + r.snippet + "</div>"
          : "") +
        "</a>",
    )
    .join("")
}
searchBtn?.addEventListener("click", openSearch)
searchClose?.addEventListener("click", closeSearch)
searchOverlay?.addEventListener("click", (e) => {
  if (e.target === searchOverlay) closeSearch()
})
let timeout = null
searchInput?.addEventListener("input", () => {
  if (timeout) clearTimeout(timeout)
  timeout = setTimeout(() => search(searchInput.value), 150)
})
searchInput?.addEventListener("keydown", (e) => {
  if (e.key === "Escape") closeSearch()
  else if (e.key === "ArrowDown") {
    e.preventDefault()
    if (selectedIdx < results.length - 1) {
      selectedIdx++
      render()
    }
  } else if (e.key === "ArrowUp") {
    e.preventDefault()
    if (selectedIdx > 0) {
      selectedIdx--
      render()
    }
  } else if (e.key === "Enter" && results[selectedIdx]) {
    e.preventDefault()
    location.href = results[selectedIdx].url
  }
})
document.addEventListener("keydown", (e) => {
  if (
    (e.key === "/" && !(e.target instanceof HTMLInputElement)) ||
    ((e.metaKey || e.ctrlKey) && e.key.toLowerCase() === "k")
  ) {
    e.preventDefault()
    openSearch()
  }
})
// Scroll to hash on page load and handle hash link clicks
const scrollToHash = () => {
  const hash = location.hash
  if (hash) {
    const target = document.querySelector(hash)
    if (target) {
      setTimeout(
        () => target.scrollIntoView({ behavior: "smooth", block: "start" }),
        100,
      )
    }
  }
}
scrollToHash()
window.addEventListener("hashchange", scrollToHash)
document.querySelectorAll('a[href^="#"]').forEach((a) =>
  a.addEventListener("click", (e) => {
    const hash = a.getAttribute("href")
    const target = document.querySelector(hash)
    if (target) {
      e.preventDefault()
      target.scrollIntoView({ behavior: "smooth", block: "start" })
      history.pushState(null, null, hash)
    }
  }),
)
// Mobile footer buttons
const mobileMenuBtn = document.querySelector("[data-mobile-menu]"),
  mobileSearchBtn = document.querySelector("[data-mobile-search]"),
  mobileThemeBtn = document.querySelector("[data-mobile-theme]")
mobileMenuBtn?.addEventListener("click", () => {
  if (sidebar && overlay) {
    sidebar.classList.toggle("open")
    overlay.classList.toggle("open")
  }
})
mobileSearchBtn?.addEventListener("click", openSearch)
mobileThemeBtn?.addEventListener("click", () =>
  setTheme(getTheme() === "dark" ? "light" : "dark"),
)