Managed Metadata Service JSOM Examples for SharePoint 2013 -

//This is the most verbose way of accessing the OM that is possible.
//This is so as to familiarize myself with the JSOM for the Taxonomy service.
//It is the WORST kind of demo code!
//My idea was just to be able to go to my O365 dev site and play in the console.
//The SP.Taxonomy name space is found in _layouts/15/sp.taxonomy.js

//Load the script
var fileref = document.createElement('script');
fileref.setAttribute("type","text/javascript");
fileref.setAttribute("src", "_layouts/15/sp.taxonomy.js");
document.getElementsByTagName("head")[0].appendChild(fileref);


var context = SP.ClientContext.get_current();
var taxonomySession = SP.Taxonomy.TaxonomySession.getTaxonomySession(context);

//How do you determine the Term Stores that are available?
var termStores = taxonomySession.get_termStores();

context.load(taxonomySession);
context.load(termStores);

var termStoresEnum;
var currentTermStore;

context.executeQueryAsync(function(){
        termStoresEnum = termStores.getEnumerator();

        console.log("Available Term Stores:\n");

        while (termStoresEnum.moveNext()) {
            currentTermStore =  termStoresEnum.get_current();
            console.log( "Name: " + currentTermStore.get_name() +
                         " ID:" + currentTermStore.get_id() +
                         " Language: " + currentTermStore.get_languages() );
        }
    },
    function(){
        console.log("Error loading termstore.");
    });


//What is returned by Execute Query Async?
[{
        "SchemaVersion": "15.0.0.0",
        "LibraryVersion": "16.0.2524.1200",
        "ErrorInfo": null,
        "TraceCorrelationId": "2647739c-ebe6-d05b-9278-0fcd71853134"
    },
    11, {
        "IsNull": false
    },
    12, {
        "_ObjectIdentity_": "fec14c62-7c3b-561b-851b-c80d7802b224:ss:"
    },
    14, {
        "IsNull": false
    },
    15, {
        "_ObjectType_": "SP.Taxonomy.TaxonomySession",
        "_ObjectIdentity_": "fec14c62-7c3b-321b-851b-c80d7802b224:ss:",
        "OfflineTermStoreNames": [

        ]
    },
    16, {
        "_ObjectType_": "SP.Taxonomy.TermStoreCollection",
        "_Child_Items_": [{
            "_ObjectType_": "SP.Taxonomy.TermStore",
            "_ObjectIdentity_": "fec14c62-7c3b-481b-851b-c80d7802b224:st:jBvd4CKJqEKgXy799vjajw==",
            "DefaultLanguage": 1033,
            "Id": "\/Guid(e0dd1b8c-8922-42a8-a05f-262df6f8da8f)\/",
            "IsOnline": true,
            "Languages": [
                1033
            ],
            "Name": "Managed Metadata Service Application Proxy",
            "WorkingLanguage": 1033
        }]
    }
]

//You might only have one termstore.
//How do you get the default term store?

var termStore = taxonomySession.getDefaultSiteCollectionTermStore();
context.load(termStore);
context.executeQueryAsync(function(){
        console.log( "Name: " + termStore.get_name() +
                         " ID:" + termStore.get_id() +
                         " Language: " + termStore.get_languages() );
    },
    function(){
        console.log("Something went wrong");
    });

//How do you get the groups in a term store?

var groups = termStore.get_groups();
context.load(groups);
var groupsEnum;

context.executeQueryAsync(function(){
                groupsEnum = groups.getEnumerator();

                while(groupsEnum.moveNext()){
                    var currentGroup = groupsEnum.get_current();
                    console.log("Group name: " + currentGroup.get_name() + " ID: " + currentGroup.get_id() + "\n");
                }
            },
            function(){
                console.log("Could not load groups.");
            });

//Once you know which groups can be accessed, you can look up specific groups by ID.
var peopleGroup = groups.getById('59b265c3-d9e5-433e-acf8-a18a2e5b9839');

var peopleTermSets = peopleGroup.get_termSets();
var departments;
context.load(peopleTermSets);
context.executeQueryAsync(function(){
    var peopleTermSetsEnum = peopleTermSets.getEnumerator();
    while(peopleTermSetsEnum.moveNext()){
        if(peopleTermSetsEnum.get_current().get_name() === 'Department'){
            departments = peopleTermSetsEnum.get_current();
            break;
        }
    }
},function(){});

var terms = departments.getAllTerms();
context.load(terms);
var departmentNames = [];

context.executeQueryAsync(function(){
    var termsEnum = terms.getEnumerator();
    while(termsEnum.moveNext()){
        var currentTerm = termsEnum.get_current();
        departmentNames.push({name: currentTerm.get_name(), id: currentTerm.get_id().toString(); });
    }
}, function(){});