Create _design/app CouchDB design document.

_design/app/lists/collections.js

@@ -0,0 +1,27 @@
+function(head, req) {
+    registerType("hal", "application/hal+json");
+    provides("hal", function() {
+        start({
+            "headers": {
+                "Content-Type": "application/hal+json",
+                "Vary": "Accept"
+            }
+        });
+        var collections = {
+            "_links": {
+                "self": { "href": "/" },
+                "item": []
+            },
+            "title": "Collections"
+        };
+        var row;
+        while (row = getRow()) {
+            collections._links.item.push({
+                "href": "/" + row.key + "/",
+                "title": row.value
+            });
+        }
+        send(toJSON(collections));
+        send("\n");
+    });
+}

_design/app/lists/items.js

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+function(head, req) {
+    registerType("hal", "application/hal+json");
+    provides("hal", function() {
+        start({
+            "headers": {
+                "Content-Type": "application/hal+json",
+                "Vary": "Accept"
+            }
+        });
+        var resource = {};
+        var row;
+        while (row = getRow()) {
+            if (0 == row.key[1]) {
+                resource = row.value;
+                resource._links.item = [];
+            } else if (1 == row.key[1] && resource._links) {
+                resource._links.item.push({
+                    "href": "/" + row.key[0] + "/" + row.id
+                });
+            }
+        }
+        send(toJSON(resource));
+        send("\n");
+    });
+}

_design/app/rewrites.json

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+[
+    {
+        "from": "/",
+        "to": "/_list/collections/collections",
+        "method": "GET"
+    },
+    {
+        "from": "/",
+        "to": "/_update/collection",
+        "method": "POST"
+    },
+    {
+        "from": "/:collection/",
+        "to": "/_list/items/items",
+        "method": "GET",
+        "query": {
+            "reduce": false,
+            "startkey": [":collection", 0],
+            "endkey": [":collection", 1]
+        }
+    },
+    {
+        "from": "/:collection",
+        "to": "/_update/collection/:collection",
+        "method": "PUT"
+    },
+    {
+        "from": "/:collection",
+        "to": "/_update/collection/:collection",
+        "method": "DELETE"
+    },
+    {
+        "from": "/:collection/",
+        "to": "/_update/item",
+        "method": "POST",
+        "query": {
+            "collection": ":collection"
+        }
+    },
+    {
+        "from": "/:collection/:item",
+        "to": "/_show/item/:item",
+        "method": "GET"
+    },
+    {
+        "from": "/:collection/:item",
+        "to": "/_update/item/:item",
+        "method": "PUT"
+    },
+    {
+        "from": "/:collection/:item",
+        "to": "/_update/item/:item",
+        "method": "DELETE"
+    }
+]

_design/app/shows/item.js

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+function(doc, req) {
+    registerType("hal", "application/hal+json");
+    provides("hal", function() {
+        return {
+            "headers": {
+                "Content-Type": "application/hal+json",
+                "Vary": "Accept"
+            },
+            "body": toJSON(doc.resource) + "\n"
+        };
+    });
+}

_design/app/updates/collection.js

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+function(doc, req) {
+    if ("DELETE" == req.method) {
+        doc._deleted = true;
+        return [doc, {}];
+    }
+    switch (req.headers["Content-Type"]) {
+        case "application/hal+json":
+            if (doc) {
+                updatedDoc = doc;
+            } else {
+                var updatedDoc = {};                
+            }
+            updatedDoc.resource = JSON.parse(req.body);
+            if (!updatedDoc._id) {
+                if (req.id) {
+                    updatedDoc._id = req.id;
+                } else if (req.uuid) {
+                    updatedDoc._id = req.uuid;
+                }
+            }
+            updatedDoc.is_collection = true;
+            updatedDoc.resource._links = {
+                "self": { "href": "/" + updatedDoc._id + "/" },
+                "up": { "href": "/" }
+            };
+            return [
+                updatedDoc,
+                {
+                    "headers": {
+                        "Location": updatedDoc.resource._links.self.href,
+                        "Content-Type": "application/hal+json",
+                        "Vary": "Accept"
+                    },
+                    "body": toJSON(updatedDoc.resource) + "\n"
+                }
+            ];
+        default:
+            return [
+                null,
+                {
+                    "code": 415,
+                    "headers": {
+                        "Content-Type": "text/plain;charset=utf-8",
+                        "Vary": "Accept"
+                    },
+                    "body": toJSON({"error":"unsupported_media_type","reason":"The media type sent is not supported."}) + "\n"
+                }
+            ];
+    }
+}

_design/app/updates/item.js

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+function(doc, req) {
+    if ("DELETE" == req.method) {
+        doc._deleted = true;
+        return [doc, {}];
+    }
+    switch (req.headers["Content-Type"]) {
+        case "application/hal+json":
+            if (doc) {
+                updatedDoc = doc;
+            } else {
+                var updatedDoc = {};                
+            }
+            updatedDoc.resource = JSON.parse(req.body);
+            if (!updatedDoc._id) {
+                if (req.id) {
+                    updatedDoc._id = req.id;
+                } else if (req.uuid) {
+                    updatedDoc._id = req.uuid;
+                }
+            }
+            if (req.query.collection) {
+                updatedDoc.collection = req.query.collection;
+            }
+            updatedDoc.resource._links = {
+                "self": { "href": "/" + updatedDoc.collection + "/" + updatedDoc._id },
+                "collection": { "href": "/" + updatedDoc.collection + "/" }
+            };
+            return [
+                updatedDoc,
+                {
+                    "headers": {
+                        "Location": updatedDoc.resource._links.self.href,
+                        "Content-Type": "application/hal+json",
+                        "Vary": "Accept"
+                    },
+                    "body": toJSON(updatedDoc.resource) + "\n"
+                }
+            ];
+        default:
+            return [
+                null,
+                {
+                    "code": 415,
+                    "headers": {
+                        "Content-Type": "text/plain;charset=utf-8",
+                        "Vary": "Accept"
+                    },
+                    "body": toJSON({"error":"unsupported_media_type","reason":"The media type sent is not supported."}) + "\n"
+                }
+            ];
+    }
+}

_design/app/views/collections/map.js

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+function(doc) {
+    if (doc.is_collection) {
+        emit(doc._id, doc.resource.title);
+    }
+}

_design/app/views/items/map.js

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+function(doc) {
+    if (doc.is_collection) {
+        emit([doc._id, 0], doc.resource);
+    }
+    if (doc.collection) {
+        emit([doc.collection, 1], doc.resource);
+    }
+}

_design/app/views/items/reduce.js

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+_count