Function init

lib/index-browser.js:5877–6627

(api, opts, callback)

}

function init(api, opts, callback) {

  var dbName = opts.name;

  var idb = null;
  var idbGlobalFailureError = null;
  api._meta = null;

  function enrichCallbackError(callback) {
    return function (error, result) {
      if (error && error instanceof Error && !error.reason) {
        if (idbGlobalFailureError) {
          error.reason = idbGlobalFailureError;
        }
      }

      callback(error, result);
    };
  }

  // called when creating a fresh new database
  function createSchema(db) {
    var docStore = db.createObjectStore(DOC_STORE, {keyPath : 'id'});
    db.createObjectStore(BY_SEQ_STORE, {autoIncrement: true})
      .createIndex('_doc_id_rev', '_doc_id_rev', {unique: true});
    db.createObjectStore(ATTACH_STORE, {keyPath: 'digest'});
    db.createObjectStore(META_STORE, {keyPath: 'id', autoIncrement: false});
    db.createObjectStore(DETECT_BLOB_SUPPORT_STORE);

    // added in v2
    docStore.createIndex('deletedOrLocal', 'deletedOrLocal', {unique : false});

    // added in v3
    db.createObjectStore(LOCAL_STORE, {keyPath: '_id'});

    // added in v4
    var attAndSeqStore = db.createObjectStore(ATTACH_AND_SEQ_STORE,
      {autoIncrement: true});
    attAndSeqStore.createIndex('seq', 'seq');
    attAndSeqStore.createIndex('digestSeq', 'digestSeq', {unique: true});
  }

  // migration to version 2
  // unfortunately "deletedOrLocal" is a misnomer now that we no longer
  // store local docs in the main doc-store, but whaddyagonnado
  function addDeletedOrLocalIndex(txn, callback) {
    var docStore = txn.objectStore(DOC_STORE);
    docStore.createIndex('deletedOrLocal', 'deletedOrLocal', {unique : false});

    docStore.openCursor().onsuccess = function (event) {
      var cursor = event.target.result;
      if (cursor) {
        var metadata = cursor.value;
        var deleted = isDeleted(metadata);
        metadata.deletedOrLocal = deleted ? "1" : "0";
        docStore.put(metadata);
        cursor.continue();
      } else {