Common Reading

An OVOS pipeline plugin that reads things aloud - fairy tales, articles, news, documents, reports, and whatever else a provider skill wants to offer - by orchestrating "read me something" across those provider skills, the same way OCP (ovos-common-play) orchestrates "play X" across media skills.

"If you want your children to be intelligent, read them fairy tales. If you want them to be more intelligent, read them more fairy tales." — Albert Einstein

What this is: a pipeline plugin for narrating text-based content via TTS - providers deliver plain text, and this plugin reads it aloud, sentence by sentence, with bookmarking and "continue" support.

What this is not: an audiobook or audio-file player. If you're looking for pre-recorded audiobooks, radio dramas, or narrated readings as audio files, that's already well covered by existing OCP media skills (e.g. ovos-skill-librivox, or JarbasSkills' skill-golden-audiobooks / skill-hppodcraft / skill-epic-horror-theatre). This plugin solves a different problem: letting several text content providers coexist and be searched together, without any of them registering competing voice intents.

Install

pip install ovos-common-reading-pipeline-plugin

Add it to your pipeline in mycroft.conf:

{
  "intents": {
    "pipeline": [
      "stop_high",
      "ovos-common-reading-pipeline-plugin",
      "converse",
      "ocp_high",
      "padatious_high",
      "adapt_high",
      "..."
    ]
  }
}

You'll also want at least one provider skill installed, otherwise there's nothing to read:

• ovos-skill-andersen-tales - Hans Christian Andersen fairy tales
• ovos-skill-grimm-tales - Brothers Grimm fairy tales
• ovos-skill-andrew-lang-tales - Andrew Lang's Fairy Books (Project Gutenberg, English only, no translation)
• ovos-skill-bechstein-tales - Ludwig Bechstein's German fairy tales (Project Gutenberg, German only, no translation)
• ovos-skill-cosquin-tales - Emmanuel Cosquin's Lorraine folk tales (Project Gutenberg, French only, no translation)
• ovos-skill-ovosblog - the OpenVoiceOS blog, with machine-translation support
• ovos-skill-arxiv-papers - arXiv paper abstracts (content_type: "paper")
• ovos-skill-365tomorrows-stories - daily CC-licensed flash sci-fi, with machine-translation support
• ovos-skill-horoscope-readings - daily zodiac horoscopes (content_type: "horoscope"), with machine-translation support

Building your own provider

See ovos-skill-common-reading-example - a template walking through two working patterns (RSS feeds and static-page scraping), the bus protocol, caching, and the judgment calls every provider has to make for itself (translate or not, what a human calls the source, what's worth reading aloud).

The ovos.common_reading.* bus protocol

Provider skills implement this to be usable by this plugin. It's a plain messagebus convention (like ovos.common_play.*) - no shared package dependency needed.

1. Search

Broadcast on a matched utterance:

ovos.common_reading.search
{
  "phrase": "<what the user asked for, or null for 'surprise me'>",
  "collection_hint": "<raw text like 'grimm' or 'h c andersen', or null>",
  "content_type": "<raw hint like 'story', 'book', 'article', 'poem', or null>",
  "requester": "<this plugin's id>"
}

collection_hint is set when the user names a specific source/collection ("read me a story from Grimm", "find Cinderella by Andersen"). It's raw, unvalidated text - each provider fuzzy-matches it against its own known friendly names and should only respond if it's a match, or if collection_hint is null (in which case every provider competes as usual).

content_type is a similarly raw, optional hint. A provider that only offers one kind of content can use it to stay silent when it clearly doesn't apply, but should treat a null/missing content_type as "anyone can compete".

phrase can also be null on its own - "read me a story from Grimm" with no specific title named is a valid request for the hinted provider to offer something of its own choosing.

Every provider that thinks it can help replies (within ~2s):

ovos.common_reading.search.response
{
  "skill_id": "<provider skill id>",
  "content_id": "<opaque id the provider will recognize later>",
  "title": "<human-readable title>",
  "author": "<author, optional>",
  "collection": "<book/collection name, optional>",
  "source": "<where the text comes from, e.g. 'grimmstories.com'>",
  "confidence": 0.0-1.0,
  "machine_translated": true/false (optional, defaults falsy)
}

The highest-confidence response wins (and, if it's below 0.8, this plugin confirms with the user before continuing). If a provider sets "machine_translated": true, that's disclosed as part of the announcement right before reading starts.

2. Fetch

Once something is chosen (or resumed via "continue"), a targeted request goes to just that provider:

ovos.common_reading.fetch_content.<provider_skill_id>
{"content_id": "<from the search response>", "requester": "<this plugin's id>"}

The provider replies once with the full text, split into paragraphs:

ovos.common_reading.fetch_content.response
{"paragraphs": ["First paragraph...", "Second paragraph...", ...]}

Reading pacing, sentence splitting, and bookmark tracking all happen here - providers just deliver text.

3. Ping (only used when a search comes up empty)

If a search returns zero candidates, this plugin needs to say something honest - but "I couldn't find that" and "you don't have any reading skills installed" are very different situations, and guessing which one applies (or worse, silently falling back to some other language, see #2) is worse than just asking. So it asks:

ovos.common_reading.ping
{"requester": "<this plugin's id>"}

Every provider that's loaded and listening should reply, cheaply, with no index lookup:

ovos.common_reading.pong
{"skill_id": "<provider skill id>", "collection": "<same collection name it uses in search responses>"}

This is only broadcast on the rare 0-candidates path, never on every search - a normal search/fetch round trip never triggers a ping. Based on the pongs:

• Zero pongs -> "you don't have any reading skills installed" (the most useful thing to tell the user, since it's actionable)
• At least one pong, but nothing matched a collection_hint -> "I don't know a source called X"
• At least one pong, but no phrase matched at all -> a generic "I couldn't find anything matching that"

This needs no language-awareness on the plugin's part: a provider that refused to load for the device's language (the SUPPORTED_LANGUAGES gate described below) never registers a ping handler either, so it correctly stays silent here too - the same mechanism that keeps it out of search results keeps it out of ping results, for free.

If you're building a provider, implementing this is required, not optional - a provider that never pongs looks, from the pipeline's perspective, exactly like a provider that isn't installed at all, which produces a misleading "nothing installed" message even when your skill is present and just didn't have a match. See ovos-skill-common-reading-example for the reference implementation.

Friendly names

Each provider should keep a small list of names it's willing to answer to as collection_hint - not just its skill_id, but the natural things a person might call it: ovos-skill-grimm-tales might match "grimm", "the brothers grimm"; ovos-skill-andersen-tales matches "andersen", "hans christian andersen", "h c andersen". Matching should be fuzzy (e.g. via ovos_utils.parse.match_one against the provider's own alias list) rather than exact string equality, since STT transcription is never perfectly consistent.

If collection_hint doesn't clearly match a provider's own aliases, that provider should simply not respond to the search at all - only providers that actually answered are considered.

Tune your match threshold carefully. A threshold around 0.6 can produce false positives on short strings (e.g. "andrew lang" scoring 0.63 against "andersen" on plain character overlap, nothing to do with meaning) - 0.85 is a safer default. Verify empirically for your own alias list.

Language handling

Every provider in this family handles the device's language one of two ways:

• Fixed set of supported languages, no translation (ovos-skill-andersen-tales, ovos-skill-grimm-tales, ovos-skill-andrew-lang-tales): checks a SUPPORTED_LANGUAGES set at the top of initialize(), before building any index or registering any bus events. On an unsupported device language, the provider logs why and stays completely inert - never loads an index, never listens for ovos.common_reading.search - rather than loading fully and silently declining every search.
• Machine translation (ovos-skill-ovosblog, ovos-skill-arxiv-papers): always loads (it can't know in advance whether a translation plugin will be configured), matches search phrases against translated titles, and declines per-search rather than per-load if no translator is available.

Neither pattern ever silently serves the wrong language - the difference is only when the provider decides it can't help (once, at load time, if it has no way to translate; or per-search, if it might). See ovos-skill-common-reading-example's module docstring (decision points #1 and #4) for the full reasoning behind picking one over the other for your own provider.

Category

Entertainment

Tags

#reading #stories #articles #news #orchestrator #pipeline