334 lines
8.4 KiB
D
334 lines
8.4 KiB
D
module ap.activity_stream;
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import std.algorithm;
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import std.array;
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import std.datetime;
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import std.format;
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import std.json;
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import util;
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union Store {
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string str;
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ASObject[] array;
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Link[] links;
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}
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enum ObjectType {
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Object,
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String,
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Array,
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}
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/++
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* Basic ActivityStream Object
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* https://www.w3.org/TR/activitypub/#obj
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+/
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class ASObject {
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// Required fields (for root objects)
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JSONValue context; /// Must be activitystream context
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string id; /// AP requirement for unique identifier
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string type; /// AP requirement for type of object
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// Optional fields
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ASObject attachment;
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ASObject attributedTo;
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ASObject audience;
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string content;
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string name;
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DateTime endTime;
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ASObject generator;
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ASObject icon;
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ASObject image;
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ASObject inReplyTo;
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ASObject location;
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ASObject preview;
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DateTime published;
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Collection replies;
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DateTime startTime;
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string summary;
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ASObject tag;
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DateTime updated;
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Link url;
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ASObject to;
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ASObject bto;
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ASObject cc;
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ASObject bcc;
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string mediaType;
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string duration;
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JSONValue raw;
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protected Store m_store;
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protected ObjectType m_objType;
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this() {
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}
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/++
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+ Constructs the object according to json source
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+ Params:
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+ json = the source json
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+ Returns: Object
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+/
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this(JSONValue json) {
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switch (json.type) {
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case JSONType.ARRAY:
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this.m_objType = ObjectType.Array;
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this.m_store.array = json.array.map!(item => new ASObject(item)).array;
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break;
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case JSONType.OBJECT:
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this.m_objType = ObjectType.Object;
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// String properties
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optional(json, "context", context);
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optional(json, "id", id);
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optional(json, "type", type);
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optional(json, "content", content);
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optional(json, "name", name);
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optional(json, "summary", summary);
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optional(json, "mediaType", mediaType);
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optional(json, "duration", duration);
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// AS Object properties
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generator = new ASObject(json.optional!JSONValue("generator"));
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icon = new ASObject(json.optional!JSONValue("icon"));
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image = new ASObject(json.optional!JSONValue("image"));
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inReplyTo = new ASObject(json.optional!JSONValue("inReplyTo"));
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location = new ASObject(json.optional!JSONValue("location"));
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preview = new ASObject(json.optional!JSONValue("preview"));
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tag = new ASObject(json.optional!JSONValue("tag"));
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to = new ASObject(json.optional!JSONValue("to"));
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bto = new ASObject(json.optional!JSONValue("bto"));
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cc = new ASObject(json.optional!JSONValue("cc"));
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bcc = new ASObject(json.optional!JSONValue("bcc"));
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const(JSONValue)* j;
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// Date properties
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// if ((j = "endTime" in json) != null)
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// endTime = DateTime.fromISOString(json["endTime"].str);
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// if ((j = "published" in json) != null)
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// published = DateTime.fromISOString(json["published"].str);
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// if ((j = "startTime" in json) != null)
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// startTime = DateTime.fromISOString(json["startTime"].str);
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// if ((j = "updated" in json) != null)
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// updated = DateTime.fromISOString(json["updated"].str);
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url = new Link(json.optional!JSONValue("url"));
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break;
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case JSONType.STRING:
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this.m_objType = ObjectType.String;
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this.m_store.str = json.str;
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break;
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case JSONType.NULL:
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break;
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default:
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throw new Exception("Unrecognized ActivityStream Object JSON format: " ~ json.type);
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}
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raw = json;
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}
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string stringRep(int indentation = 0, string indentStr = " ") const {
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string[] output;
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string indent = "";
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string j;
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if (this.m_objType == ObjectType.String)
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return format("%s%s\n", indent, this.m_store.str);
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if (this.m_objType == ObjectType.Array) {
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output ~= "[";
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foreach (obj; this.m_store.array)
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output ~= format("%s%s%s%s,", indent, indentStr, indentStr, obj.stringRep(indentation + 1));
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output ~= format("%s%s]", indent, indentStr);
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return output.length == 2 ? "" : output.join("\n");
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}
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for (int i = 0; i < indentation; i++)
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indent ~= indentStr;
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output ~= format("%s {", this.type);
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if (id)
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output ~= format("%s%sid = %s", indent, indentStr, id);
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if (content)
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output ~= format("%s%scontent = %s", indent, indentStr, content);
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if (name)
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output ~= format("%s%sname = %s", indent, indentStr, name);
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// if (summary)
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// output ~= format("%s%ssummary = %s", indent, indentStr, summary);
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if (mediaType)
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output ~= format("%s%smediaType = %s", indent, indentStr, mediaType);
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if (duration)
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output ~= format("%s%sduration = %s", indent, indentStr, duration);
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if (url && (j = url.stringRep(indentation + 1)) != string.init)
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output ~= format("%s%surl = %s", indent, indentStr, j);
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if (icon && (j = icon.stringRep(indentation + 1)) != string.init)
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output ~= format("%s%sicon = %s", indent, indentStr, j);
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if (image && (j = image.stringRep(indentation + 1)) != string.init)
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output ~= format("%s%simage = %s", indent, indentStr, j);
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if (tag && (j = tag.stringRep(indentation + 1)) != string.init)
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output ~= format("%s%stag = %s", indent, indentStr, j);
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output ~= indent ~ "}";
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return output.length == 2 ? "" : output.join("\n");
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}
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}
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class Link {
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string type;
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string href;
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string[] rel;
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string mediaType;
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string name;
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int height, width;
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ASObject preview;
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protected Store m_store;
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protected ObjectType m_objType;
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JSONValue raw;
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this() {
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}
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this(JSONValue json) {
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switch (json.type) {
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case JSONType.ARRAY:
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m_objType = ObjectType.Array;
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m_store.links = json.array.map!(item => new Link(item)).array;
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break;
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case JSONType.OBJECT:
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m_objType = ObjectType.Object;
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optional(json, "type", type);
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optional(json, "href", href);
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optional(json, "mediaType", mediaType);
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optional(json, "name", name);
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optional(json, "height", height);
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optional(json, "width", width);
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const(JSONValue)* j;
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if ((j = "rel" in json) != null)
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rel = (*j).array.map!(item => item.str).array;
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preview = new ASObject(json.optional!JSONValue("preview"));
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break;
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case JSONType.STRING:
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m_objType = ObjectType.String;
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m_store.str = json.str;
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break;
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case JSONType.NULL:
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break;
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default:
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throw new Exception("Unrecognized ActivityStream Link JSON format");
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}
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this.raw = json;
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}
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string stringRep(int indentation = 0, string indentStr = " ") const {
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string[] output;
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string indent = "";
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string j;
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if (this.m_objType == ObjectType.String)
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return format("%s%s", indent, this.m_store.str);
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for (int i = 0; i < indentation; i++)
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indent ~= indentStr;
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output ~= format("%s {", this.type);
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if (href)
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output ~= format("%s%shref = %s", indent, indentStr, href);
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if (mediaType)
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output ~= format("%s%smediaType = %s", indent, indentStr, mediaType);
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if (name)
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output ~= format("%s%sname = %s", indent, indentStr, name);
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if (height)
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output ~= format("%s%sheight = %d", indent, indentStr, height);
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if (width)
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output ~= format("%s%swidth = %d", indent, indentStr, width);
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if (preview && (j = preview.stringRep(indentation + 1)) != string.init)
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output ~= format("%s%spreview = %s", indent, indentStr, j);
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output ~= indent ~ "}";
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if (output.length == 2)
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return "";
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return output.join("\n");
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}
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}
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class Collection : ASObject {
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int totalItems;
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CollectionPage current;
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CollectionPage first;
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CollectionPage last;
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ASObject items;
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this(JSONValue json) {
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super(json);
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if (this.m_objType != ObjectType.Object)
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throw new Exception("Wrong Collection format?");
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optional(json, "totalItems", totalItems);
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current = new CollectionPage(json.optional!JSONValue("current"));
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first = new CollectionPage(json.optional!JSONValue("first"));
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last = new CollectionPage(json.optional!JSONValue("last"));
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items = new ASObject(json.optional!JSONValue("items"));
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}
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}
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class CollectionPage : Collection {
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CollectionPage partOf;
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CollectionPage next;
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CollectionPage prev;
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this(JSONValue json) {
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super(json);
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if (this.m_objType != ObjectType.Object)
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throw new Exception("Wrong CollectionPage format?");
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partOf = new CollectionPage(json.optional!JSONValue("partOf"));
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next = new CollectionPage(json.optional!JSONValue("next"));
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prev = new CollectionPage(json.optional!JSONValue("prev"));
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}
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}
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