perkeep/server/go/camlistored/ui/permanode.js

/*
Copyright 2011 Google Inc.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

// Gets the |p| query parameter, assuming that it looks like a blobref.
function getPermanodeParam() {
    var blobRef = getQueryParam('p');
    return (blobRef && isPlausibleBlobRef(blobRef)) ? blobRef : null;
}

function handleFormTitleSubmit(e) {
    e.stopPropagation();
    e.preventDefault();

    var inputTitle = document.getElementById("inputTitle");
    inputTitle.disabled = "disabled";
    var btnSave = document.getElementById("btnSave");
    btnSave.disabled = "disabled";

    var startTime = new Date();

    camliNewSetAttributeClaim(
        getPermanodeParam(),
        "title",
        inputTitle.value,
        {
            success: function() {
                var elapsedMs = new Date().getTime() - startTime.getTime();
                setTimeout(function() {
                    inputTitle.disabled = null;
                    btnSave.disabled = null;
                }, Math.max(250 - elapsedMs, 0));
            },
            fail: function(msg) {
                alert(msg);
                inputTitle.disabled = null;
                btnSave.disabled = null;
            }
        });
}

function handleFormTagsSubmit(e) {
    e.stopPropagation();
    e.preventDefault();

    var input = document.getElementById("inputNewTag");
    var btn = document.getElementById("btnAddTag");

    if (input.value == "") {
        return;
    }

    input.disabled = "disabled";
    btn.disabled = "disabled";

    var startTime = new Date();

    var tags = input.value.split(/\s*,\s*/);
    var nRemain = tags.length;

    var oneDone = function() {
        nRemain--;
        if (nRemain == 0) {
            var elapsedMs = new Date().getTime() - startTime.getTime();
            setTimeout(function() {
                           input.disabled = null;
                           btn.disabled = null;
                       }, Math.max(250 - elapsedMs, 0));
        }
    };
    for (idx in tags) {
        var tag = tags[idx]; 
        camliNewAddAttributeClaim(
            getPermanodeParam(),
            "tag",
            tag,
            {
                success: oneDone,
                fail: function(msg) {
                    alert(msg);
                    oneDone();
                }
            });
    }
}

function deleteTagFunc(tag, strikeEle, removeEle) {
    return function(e) {
        strikeEle.innerHTML = "<s>" + strikeEle.innerHTML + "</s>";
        camliNewDelAttributeClaim(
            getPermanodeParam(),
            "tag",
            tag,
            {
                success: function() {
                    removeEle.innerHTML = "";
                },
                fail: function(msg) {
                    alert(msg);
                }
            });
    };
}

function onTypeChange(e) {
    var sel = document.getElementById("type");
    var dnd = document.getElementById("dnd");

    if (sel.value == "collection" || sel.value == "") {
        dnd.style.display = "block";
    } else {
        dnd.style.display = "none"; 
    }
    
}

var lastFiles;
function handleFiles(files) {
    lastFiles = files;

    for (var i = 0; i < files.length; i++) {
        var file = files[i];
        startFileUpload(file);
    }
}

function startFileUpload(file) {
    var dnd = document.getElementById("dnd");
    var up = document.createElement("div");
    up.setAttribute("class", "fileupload");
    dnd.appendChild(up);
    var info = "name=" + file.name + " size=" + file.size + "; type=" + file.type;

    var setStatus = function(status) {
        up.innerHTML = info + " " + status;
    };
    setStatus("(scanning)");

    var contentsRef; // set later

    var onFail = function(msg) {
        up.innerHTML = info + " <b>fail:</b> ";
        up.appendChild(document.createTextNode(msg));
    };

    var onGotFileSchemaRef = function(fileref) {
        setStatus(" <b>fileref: " + fileref + "</b>");
        camliCreateNewPermanode(
            {
            success: function(filepn) {
                var doneWithAll = function() {
                    setStatus("- done");
                };
                var addMember = function() {
                    setStatus("adding member");
                    camliNewAddAttributeClaim(getPermanodeParam(), "member", filepn, { success: doneWithAll, fail: onFail });
                };
                var makePermanode = function() {
                    setStatus("making permanode");
                    camliNewSetAttributeClaim(filepn, "camliContent", fileref, { success: addMember, fail: onFail });
                };
                makePermanode();
            },
            fail: onFail
        });
    };

    var fr = new FileReader();
    fr.onload = function() {
        dataurl = fr.result;
        comma = dataurl.indexOf(",")
        if (comma != -1) {
            b64 = dataurl.substring(comma + 1);
            var arrayBuffer = Base64.decode(b64).buffer;
            var hash = Crypto.SHA1(new Uint8Array(arrayBuffer, 0));

            contentsRef = "sha1-" + hash;
            setStatus("(checking for dup of " + contentsRef + ")");
            camliUploadFileHelper(file, contentsRef, { success: onGotFileSchemaRef, fail: onFail });
        }
    };
    fr.readAsDataURL(file);
}

function onFileFormSubmit(e) {
    e.stopPropagation();
    e.preventDefault();
    alert("TODO: upload");
}

function onFileInputChange(e) {
    handleFiles(document.getElementById("fileInput").files);
}

function setupFilesHandlers(e) {    
    var dnd = document.getElementById("dnd");
    document.getElementById("fileForm").addEventListener("submit", onFileFormSubmit);
    document.getElementById("fileInput").addEventListener("change", onFileInputChange);

    stop = function(e) {
        e.stopPropagation();
        e.preventDefault();
    };
    dnd.addEventListener("dragenter", stop, false);
    dnd.addEventListener("dragover", stop, false);

    drop = function(e) {
        stop(e);
        var dt = e.dataTransfer;
        var files = dt.files;
        document.getElementById("info").innerHTML = "";
        handleFiles(files);
    };
    dnd.addEventListener("drop", drop, false);
}

window.addEventListener("load", function (e) {
    var permanode = getPermanodeParam();
    if (permanode) {
      document.getElementById('permanode').innerHTML = "<a href='./?p=" + permanode + "'>" + permanode + "</a>";
        document.getElementById('permanodeBlob').innerHTML = "<a href='./?b=" + permanode + "'>view blob</a>";
    }

    var formTitle = document.getElementById("formTitle");
    formTitle.addEventListener("submit", handleFormTitleSubmit);
    var formTags = document.getElementById("formTags");
    formTags.addEventListener("submit", handleFormTagsSubmit);

    var selectType = document.getElementById("type");
    selectType.addEventListener("change", onTypeChange);

    setupFilesHandlers();

    camliDescribeBlob(permanode, {
        success: function(jres) {
            if (!jres[permanode]) {
                alert("didn't get blob " + permanode);
                return;
            }
            var permanodeObject = jres[permanode].permanode;
            if (!permanodeObject) {
                alert("blob " + permanode + " isn't a permanode");
                return;
            }

            var inputTitle = document.getElementById("inputTitle");
            inputTitle.value =
                (permanodeObject.attr.title && permanodeObject.attr.title.length == 1) ?
                permanodeObject.attr.title[0] :
                "";
            inputTitle.disabled = null;


            var spanTags = document.getElementById("spanTags");
            while (spanTags.firstChild) {
                spanTags.removeChild(spanTags.firstChild);
            }

            var membersDiv = document.getElementById("members");
            membersDiv.innerHTML = "";
            var members = permanodeObject.attr.member;
            if (members && members.length > 0) {
                var membersUl = document.createElement("ul");
                for (idx in members) {
                    var member = members[idx];
                    var memberLi = document.createElement("li");
                    var memberLink = document.createElement("a");
                    memberLi.appendChild(memberLink);
                    memberLink.href = "./?p=" + member;
                    memberLink.innerText = member;
                    membersUl.appendChild(memberLi);
                }
                membersDiv.appendChild(document.createTextNode("Members:"));
                membersDiv.appendChild(membersUl);
            }

            var tags = permanodeObject.attr.tag;
            for (idx in tags) {
                var tagSpan = document.createElement("span");

                if (idx > 0) {
                    tagSpan.appendChild(document.createTextNode(", "));
                }
                var tagLink = document.createElement("i");
                var tag = tags[idx];
                tagLink.innerText = tags[idx];
                tagSpan.appendChild(tagLink);
                tagSpan.appendChild(document.createTextNode(" ["));
                var delLink = document.createElement("a");
                delLink.href = '#';
                delLink.innerText = "X";
                delLink.addEventListener("click", deleteTagFunc(tag, tagLink, tagSpan));
                tagSpan.appendChild(delLink);
                tagSpan.appendChild(document.createTextNode("]"));

                spanTags.appendChild(tagSpan);
            }

            var btnSave = document.getElementById("btnSave");
            btnSave.disabled = null;
        },
        failure: function(msg) { alert("failed to get blob description: " + msg); }
    });
});