mirror of
https://github.com/flynx/ImageGrid.git
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169 lines
3.6 KiB
Plaintext
Executable File
169 lines
3.6 KiB
Plaintext
Executable File
Concepts
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basic
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key
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| a basic global identification mechanism.
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| each entity in the system has a key.
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| NOTE: a good key should be uniquely calculable from an entity.
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item
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| a basic element in the system.
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| an item is represented by a URL
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group (item)
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| a special item that unifies several items
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list
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| a representation of several items
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tag
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| a piece of text connected with an item
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action
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| a user defined command or script
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constructed
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state (tag)
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| a named state of an item
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stack (group)
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| a set of versions or states of an item
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| a stack behaves like an item
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collection/list
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| a special list defined manually or with a search that is maintained in the filesystem
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tag chain
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| a special tag that consists of several tags
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event
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| a condition that can be bound to an action
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workflow
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| a named sequence/graph of states and transitions (actions)
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structural
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URL
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index
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| contains:
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metadata
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item data
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GID
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metadata
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GIDs of available local sub-items (thumbs, previews, ...)
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GIDs of available remote sub-items (thumbs, previews, ...)
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URLs (optional)
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| URLs are only local...
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store
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cache
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cache
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store
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clone/remote (???)
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structure
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configuration (archive-wide)
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general settings
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actions
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scripts
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remote refs
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clone settings
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index (metadata)
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item store (URLs)
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local cache (previews)
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version info
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index directory structure
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.ig/
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items/
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| item store.
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| contains refs to original objects.
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<item-id>.json
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| contains refs to original data (remote)
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...
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<pack-id>.pack
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...
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meta/ XXX
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| metadata and tag store
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| XXX this is not final...
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<tag-name>.json
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...
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cache/
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| cache configuration and listings
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<cache-id>/
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<cache-id>.json
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| contains specific cache configuration
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| - query
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| - generator configuration
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| - image resolution
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| - ...
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| - output dir (default: .ig/cache/<cache-id>)
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...
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<image-id>.jpg
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...
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<item-id>.json
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| contains refs to specific <cache-id> and location.
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| NOTE: a single item may appear in several caches, hence a
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| single place to keep the item-specific refs and multiple
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| cache dirs.
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...
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<pack-id>.pack
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...
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config/ XXX
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history/ XXX
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| this directory is dependant on what VCS is used.
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scripts/ XXX
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actions/
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<action-name>
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...
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<script-name>
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...
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events/ XXX
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<event-name>/
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<priority>.<action-name>
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...
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...
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<catalogue-name>/
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...
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requirements
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index external data (represented by URLs and groups of URLs)
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indexing is done via tags (metadata)
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provide generic data operations
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search/select
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import
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copy/move/...
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...
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provide data-specific operations
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import
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thumbnails/previews (for images)
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...
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provide archive-level operations
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clone
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push/pull
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commit
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...
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provide trivial configurability
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data-specific actions
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domain-specific archive actions
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stored data
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| the main idea behind this is to make a git like management system
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| suited for a slightly different data, characterised as:
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very large umbers of elements/files
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continually increasing number of elements
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elements rarely change (almost no diffing needed)
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metadata is constantly changed
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large elements
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span more than one storage media
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indirect as well as direct element cloning
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copy / backup
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preview
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thumbnail
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data is constantly searched or accessed
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basic requirements
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safe originals
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main workflows
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import new data
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.
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| vim:set spell ts=4 sw=4 :
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