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@@ -0,0 +1,114 @@ +## 1.0 Architecture Design + +![dat-arch.001.jpg](dat-arch.001.jpg) + + + * dat: command-line + * dat-desk: desktop application + * dat-server: http and ui frontend + * dat-js: JS api + * hyperdrive: storage layer + * discovery-swarm: swarm + + +## dat-js + +A common JavaScript API for Dat. + +``` +var Dat = require('dat-js') +``` + +#### `var dat = Dat(opts, cb)` + +Options + + * `db`: leveldb instance for underlying hyperdrive + * `DISCOVERY_SERVER`: the discovery server to use. (default 'discovery1.publicbits.org') + * `DAT_DOMAIN`: the domain to use (default 'dat.local') + +#### `dat.link(dir, cb)` + +Create a dat link for the given directory. Does not start sharing the dat. Must use `dat.join` to begin serving the link to the swarm. + +```js +var linker = dat.link(dir) +var done = function (err, link) { + if (err) throw err + console.log('Done linking!', link) +} +var dir = '/Users/karissa/data/mydata' +var linker = dat.link(dir, done) +linker.on('progress', function (progress) { + console.log('progress item', progress) +}) +``` + +#### `dat.download(link, dir, cb)` + +Download the given link to a given location. Get progress events from the stream. Progress events are the same as emitted by the `dat` object. + +```js +var done = function (err) { + if (err) throw err + console.log('Done downloading!') +} +var link = 'dat://8a82dae10ee8384' +var dir = '/Users/karissa/data/mydata' +var downloader = dat.download(link, dir, done) +downloader.on('progress', function (progress) { + console.log('progress item', progress) +}) +``` + +#### `dat.join(link, cb)` + +Join a swarm for the given link. Should be called after `link` or `download`. Throws error if data has not been downloaded or linked. + +#### `dat.leave(link, cb)` + +Leave the swarm for the given link. + +#### `dat.on('progress', cb)` + +Get all progress events from uploading and downloading data. + +```js +dat.on('progress', function (progress) { + console.log(progress) +}) +``` + +## dat + +Command-line interface for dat + +#### `dat link DIR` + +Create a new link for the contents of a directory and begin automatically serving the data to a swarm in the background. + + * `--foreground`: run the server in the foreground instead. + +#### `dat download LINK DIR` + +Download a link to a directory and begin automatically serving the data to a swarm in the background. + + * `--foreground`: run the server in the foreground instead. + +#### `dat join LINK` + +Starts serving the given link in a background progress. Must have already performed `link` or `download`. + + * `--foreground`: run the server in the foreground instead. + +#### `dat leave LINK` + +Stops serving the given link to the discovery swarm. Must have already performed `link` or `download`. + +#### `dat ls` + +View a static list of the current dat links that are served. + +#### `dat mon` + +Opens up real-time monitoring panel for viewing progress of running dats. Can provide optional parameter `dat mon LINK` to filter the monitor and logs for a given dat link. |