Annotation-System/cinera/cinera_search.js

if (location.hash && location.hash.length > 0) {
    var initialQuery = location.hash;
    if (initialQuery[0] == "#") {
        initialQuery = initialQuery.slice(1);
    }
    document.getElementById("query").value = decodeURIComponent(initialQuery);
}


var indexContainer = document.getElementById("cineraIndex");
var lastQuery = null;
var resultsToRender = [];
var resultsIndex = 0;
var resultsMarkerIndex = 0;
var resultsContainer = document.getElementById("results");
var rendering = false;

var dayContainerPrototype = document.createElement("DIV");
dayContainerPrototype.classList.add("dayContainer");
dayContainerPrototype.classList.add(projectID);

var dayNamePrototype = document.createElement("SPAN");
dayNamePrototype.classList.add("dayName");
dayContainerPrototype.appendChild(dayNamePrototype);

var markerListPrototype = document.createElement("DIV");
markerListPrototype.classList.add("markerList");
markerListPrototype.classList.add(projectID);
dayContainerPrototype.appendChild(markerListPrototype);

var markerPrototype = document.createElement("A");
markerPrototype.classList.add("marker");
markerPrototype.setAttribute("target", "_blank");

var highlightPrototype = document.createElement("B");

var episodes = [];

function getEpisodeName(filename) {
    var day = filename;
    var dayParts = day.match(/([a-zA-Z_-]+)([0-9]+)?([a-zA-Z]+)?/);
    day = dayParts[1].slice(0, 1).toUpperCase() + dayParts[1].slice(1) + (dayParts[2] ? " " + dayParts[2] : "") + (dayParts[3] ? " " + dayParts[3].toUpperCase() : "");
    return day;
}

function markerTime(totalTime) {
    var markTime = "(";
    var hours = Math.floor(totalTime / 60 / 60);
    var minutes = Math.floor(totalTime / 60) % 60;
    var seconds = totalTime % 60;
    if (hours > 0) {
        markTime += padTimeComponent(hours) + ":";
    }

    markTime += padTimeComponent(minutes) + ":" + padTimeComponent(seconds) + ")";

    return markTime;
}

function padTimeComponent(component) {
    return (component < 10 ? "0" + component : component);
}

function runSearch() {
    var queryStr = document.getElementById("query").value;
    if (lastQuery != queryStr) {
        var oldResultsContainer = resultsContainer;
        resultsContainer = oldResultsContainer.cloneNode(false);
        oldResultsContainer.parentNode.insertBefore(resultsContainer, oldResultsContainer);
        oldResultsContainer.remove();
        resultsIndex = 0;
        resultsMarkerIndex = 0;
    }
    lastQuery = queryStr;
    resultsToRender = [];
    var numEpisodes = 0;
    var numMarkers = 0;
    var totalSeconds = 0;
    if (queryStr && queryStr.length > 0) {
        indexContainer.style.display = "none";
        if (episodes.length > 0) {
            var query = new RegExp(queryStr.replace("(", "\\(").replace(")", "\\)").replace(/(^|[^\\])\\$/, "$1"), "gi");
            for (var i = 0; i < episodes.length; ++i) {
                var episode = episodes[i];
                var matches = [];
                for (var j = 0; j < episode.markers.length; ++j) {
                    query.lastIndex = 0;
                    var result = query.exec(episode.markers[j].text);
                    if (result && result[0].length > 0) {
                        numMarkers++;
                        matches.push(episode.markers[j]);
                        if (j < episode.markers.length-1) {
                            totalSeconds += episode.markers[j+1].totalTime - episode.markers[j].totalTime;
                        }
                    }
                }
                if (matches.length > 0) {
                    numEpisodes++;
                    resultsToRender.push({
                        query: query,
                        episode: episode,
                        matches: matches
                    });
                }
            }

            if (!rendering) {
                renderResults();
            }
        } else {
            document.querySelector(".spinner").classList.add("show");
        }
    }
    else
    {
        indexContainer.style.display = "block";
    }

    var totalTime = Math.floor(totalSeconds/60/60) + "h " + Math.floor(totalSeconds/60)%60 + "m " + totalSeconds%60 + "s ";

    document.getElementById("resultsSummary").textContent = "Found: " + numEpisodes + " episodes, " + numMarkers + " markers, " + totalTime + "total.";
}

function renderMatches(renderStart) {
    var query = resultsToRender[resultsIndex].query;
    var episode = resultsToRender[resultsIndex].episode;
    var matches = resultsToRender[resultsIndex].matches;
    var markerList = null;
    if (resultsMarkerIndex == 0) {
        var dayContainer = dayContainerPrototype.cloneNode(true);
        var dayName = dayContainer.children[0];
        markerList = dayContainer.children[1];
        dayName.textContent = episode.day + ": " + episode.title;
        resultsContainer.appendChild(dayContainer);
    } else {
        markerList = document.querySelector("#results > .dayContainer:nth-child(" + (resultsIndex+1) + ") .markerList");
    }

    do {
        var match = matches[resultsMarkerIndex];
        var marker = markerPrototype.cloneNode();
        marker.setAttribute("href", episode.filename.replace(/"/g, "") + "/#" + match.totalTime);
        query.lastIndex = 0;
        var cursor = 0;
        var text = match.text;
        var result = null;
        marker.appendChild(document.createTextNode(match.prettyTime + " "));
        while (result = query.exec(text)) {
            if (result.index > cursor) {
                marker.appendChild(document.createTextNode(text.slice(cursor, result.index)));
            }
            var highlightEl = highlightPrototype.cloneNode();
            highlightEl.textContent = result[0];
            marker.appendChild(highlightEl);
            cursor = result.index + result[0].length;
        }

        if (cursor < text.length) {
            marker.appendChild(document.createTextNode(text.slice(cursor, text.length)));
        }
        markerList.appendChild(marker);
        resultsMarkerIndex++;
    } while (resultsMarkerIndex < matches.length && performance.now() - renderStart < 1);

    return resultsMarkerIndex == matches.length;
}

function renderResults() {
    if (resultsIndex < resultsToRender.length) {
        rendering = true;
        var renderStart = performance.now();
        while (resultsIndex < resultsToRender.length && performance.now() - renderStart < 1) {
            var done = renderMatches(renderStart);
            if (done) {
                resultsMarkerIndex = 0;
                resultsIndex++;
            }
        }
        requestAnimationFrame(renderResults);
    } else {
        rendering = false;
    }
}

var queryEl = document.getElementById("query")
queryEl.addEventListener("input", function(ev) {
    history.replaceState(null, null, "#" + encodeURIComponent(queryEl.value));
    runSearch();
});

var xhr = new XMLHttpRequest();
xhr.addEventListener("load", function() {
    var contents = xhr.response;
    var lines = contents.split("\n");
    var mode = "none";
    var episode = null;
    for (var i = 0; i < lines.length; ++i) {
        var line = lines[i];
        if (line.trim().length == 0) { continue; }
        if (line == "---") {
            if (episode != null) {
                episode.filename = episode.name;
                episode.day = getEpisodeName(episode.filename + ".html.md");
                episodes.push(episode);
            }
            episode = {};
            mode = "none";
        } else if (line.startsWith("name:")) {
            episode.name = line.slice(6);
        } else if (line.startsWith("title:")) {
            episode.title = line.slice(7).replace(/"/g, "");
        } else if (line.startsWith("markers")) {
            mode = "markers";
            episode.markers = [];
        } else if (mode == "markers") {
            var match = line.match(/"(\d+)": "(.+)"/);
            if (match == null) {
                console.log(name, line);
            } else {
                var totalTime = parseInt(line.slice(1));
                var marker = {
                    totalTime: totalTime,
                    prettyTime: markerTime(totalTime),
                    text: match[2].replace(/\\"/g, "\"")
                }
                episode.markers.push(marker);
            }
        }
    }
    document.querySelector(".spinner").classList.remove("show");
    runSearch();
});
xhr.addEventListener("error", function() {
    console.error("Failed to load content");
});
xhr.open("GET", indexLocation);
xhr.setRequestHeader("Content-Type", "text/plain");
xhr.send();

runSearch();