CoCalc -- print_to

Path: cocalc/src / smc-project / print_to_pdf.coffee
Views: ³⁹⁵³⁴
1
###############################################
2
# Printing an individual file to pdf
3
###############################################
4

5
async     = require('async')
6
fs        = require('fs')
7
temp      = require('temp')
8

9
misc      = require('smc-util/misc')
10
misc_node = require('smc-util-node/misc_node')
11
message   = require('smc-util/message')
12

13
{defaults, required} = misc
14

15
print_sagews = (opts) ->
16
    opts = defaults opts,
17
        path       : required
18
        outfile    : required
19
        title      : required
20
        author     : required
21
        date       : required
22
        contents   : required
23
        subdir     : required    # 'true' or 'false', if true, then workdir is a generated subdirectory which will retain the temporary tex files
24
        base_url   : undefined   # the base_url for downloading blobs/images
25
        extra_data : undefined   # extra data that is useful for displaying certain things in the worksheet.
26
        timeout    : 90
27
        cb         : required
28

29
    extra_data_file = undefined
30
    args = [opts.path,                 \
31
            '--outfile', opts.outfile, \
32
            '--title', opts.title,     \
33
            '--author', opts.author,   \
34
            '--date', opts.date,       \
35
            '--subdir', opts.subdir,   \
36
            '--contents', opts.contents\
37
           ]
38
    if opts.base_url
39
        args = args.concat(['--base_url', opts.base_url])
40

41
    async.series([
42
        (cb) ->
43
            if not opts.extra_data?
44
                cb(); return
45
            extra_data_file = temp.path() + '.json'
46
            args.push('--extra_data_file')
47
            args.push(extra_data_file)
48
            # NOTE: extra_data is a string that is *already* in JSON format.
49
            fs.writeFile(extra_data_file, opts.extra_data, cb)
50
        (cb) ->
51
            # run the converter script
52
            misc_node.execute_code
53
                command     : "smc-sagews2pdf"
54
                args        : args
55
                err_on_exit : true
56
                bash        : false
57
                timeout     : opts.timeout
58
                cb          : cb
59

60
        ], (err) =>
61
            if extra_data_file?
62
                fs.unlink(extra_data_file)  # no need to wait for completion before calling opts.cb
63
            opts.cb(err)
64
        )
65

66
exports.print_to_pdf = (socket, mesg) ->
67
    ext  = misc.filename_extension(mesg.path)
68
    if ext
69
        pdf = "#{mesg.path.slice(0,mesg.path.length-ext.length)}pdf"
70
    else
71
        pdf = mesg.path + '.pdf'
72

73
    async.series([
74
        (cb) ->
75
            switch ext
76
                when 'sagews'
77
                    print_sagews
78
                        path       : mesg.path
79
                        outfile    : pdf
80
                        title      : mesg.options.title
81
                        author     : mesg.options.author
82
                        date       : mesg.options.date
83
                        contents   : mesg.options.contents
84
                        subdir     : mesg.options.subdir
85
                        extra_data : mesg.options.extra_data
86
                        timeout    : mesg.options.timeout
87
                        cb         : cb
88
                else
89
                    cb("unable to print file of type '#{ext}'")
90
    ], (err) ->
91
        if err
92
            socket.write_mesg('json', message.error(id:mesg.id, error:err))
93
        else
94
            socket.write_mesg('json', message.printed_to_pdf(id:mesg.id, path:pdf))
95
    )
96

97