Title template (#194)

* added template option and validation

* update comment link to element list

* get author info when fetching video info

* added template elements to video object

* minor function naming changes

* better exit message for template error

* changed template elements for better substitution

* implemented video title template

* removed trailing decimals on duration

* added template description

* removed hashing from uniqueId
removed debug logger.warn()

* fixed typos in default template
added elements to template fail message

* moved ffmpeg version logging to verbose

src/Types.ts

@@ -6,11 +6,29 @@ export type Session = {
 
 
 export type Video = {
-    date: string;
     title: string;
+    duration: string;
+    publishDate: string;
+    publishTime: string;
+    author: string;
+    authorEmail: string;
+    uniqueId: string;
     outPath: string;
     totalChunks: number;    // Abstraction of FFmpeg timemark
     playbackUrl: string;
     posterImageUrl: string;
     captionsUrl?: string
 }
+
+
+/* TODO: expand this template once we are all on board with a list
+see https://github.com/snobu/destreamer/issues/190#issuecomment-663718010 for list*/
+export const templateElements: Array<string> = [
+    'title',
+    'duration',
+    'publishDate',
+    'publishTime',
+    'author',
+    'authorEmail',
+    'uniqueId'
+];