overleaf/services/web/app/coffee/Features/Documents/DocumentController.coffee

ProjectGetter = require "../Project/ProjectGetter"
ProjectLocator = require "../Project/ProjectLocator"
ProjectEntityHandler = require "../Project/ProjectEntityHandler"
ProjectEntityUpdateHandler = require "../Project/ProjectEntityUpdateHandler"
logger = require("logger-sharelatex")

module.exports =
	getDocument: (req, res, next = (error) ->) ->
		project_id = req.params.Project_id
		doc_id = req.params.doc_id
		plain = req?.query?.plain == 'true'
		logger.log doc_id:doc_id, project_id:project_id, "receiving get document request from api (docupdater)"
		ProjectGetter.getProject project_id, rootFolder: true, overleaf: true, (error, project) ->
			return next(error) if error?
			return res.sendStatus(404) if !project?
			ProjectLocator.findElement {project: project, element_id: doc_id, type: 'doc'}, (error, doc, path) ->
				if error?
					logger.err err:error, doc_id:doc_id, project_id:project_id, "error finding element for getDocument"
					return next(error)
				ProjectEntityHandler.getDoc project_id, doc_id, (error, lines, rev, version, ranges) ->
					if error?
						logger.err err:error, doc_id:doc_id, project_id:project_id, "error finding doc contents for getDocument"
						return next(error)
					if plain
						res.type "text/plain"
						res.send lines.join('\n')

					else
						projectHistoryId = project?.overleaf?.history?.id
						res.type "json"
						res.send JSON.stringify {
							lines: lines
							version: version
							ranges: ranges
							pathname: path.fileSystem
							projectHistoryId: projectHistoryId
						}

	setDocument: (req, res, next = (error) ->) ->
		project_id = req.params.Project_id
		doc_id = req.params.doc_id
		{lines, version, ranges} = req.body
		logger.log doc_id:doc_id, project_id:project_id, "receiving set document request from api (docupdater)"
		ProjectEntityUpdateHandler.updateDocLines project_id, doc_id, lines, version, ranges, (error) ->
			if error?
				logger.err err:error, doc_id:doc_id, project_id:project_id, "error finding element for getDocument"
				return next(error)
			logger.log doc_id:doc_id, project_id:project_id, "finished receiving set document request from api (docupdater)"
			res.sendStatus 200