Class: Hubba::Stats

Inherits:
Object
  • Object
show all
Defined in:
lib/hubba/stats.rb

Overview

keep track of repo stats over time (with history hash)

Defined Under Namespace

Classes: HistoryItem

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(full_name) ⇒ Stats

Returns a new instance of Stats.



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# File 'lib/hubba/stats.rb', line 10

def initialize( full_name )
  @data = {}
  @data['full_name'] = full_name  # e.g. poole/hyde etc.

  @cache = {}
end

Instance Attribute Details

#data ⇒ Object (readonly)

todo/check: rename to GithubRepoStats or RepoStats - why? why not?



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# File 'lib/hubba/stats.rb', line 8

def data
  @data
end

Instance Method Details

#build_history(timeseries) ⇒ Object 



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# File 'lib/hubba/stats.rb', line 141

def build_history( timeseries )
  items = []

  keys  = timeseries.keys.sort.reverse   ## newest (latest) items first
  keys.each do |key|
    h = timeseries[ key ]

    item = HistoryItem.new(
             date:  Date.strptime( key, '%Y-%m-%d' ),
             stars: h['stargazers_count'] || 0 )

    ## link items
    last_item = items[-1]
    last_item.append( item )   if last_item     ## if not nil? append (note first item has no prev item)

    items << item
  end

  ## todo/check: return [] for empty items array (items.empty?) - why?? why not??
  if items.empty?
    nil
  else
    items
  end
end

#calc_diff_stars(samples: 3, days: 30) ⇒ Object 



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# File 'lib/hubba/stats.rb', line 169

def calc_diff_stars( samples: 3, days: 30 )
  ## samples: use n history item samples e.g. 3 samples
  ## days e.g. 7 days (per week), 30 days (per month)

  if history.nil?
    nil   ## todo/check: return 0.0 too - why? why not?
  elsif history.size == 1
    ## just one item; CANNOT calc diff; return zero
    0.0
  else
    idx   = [history.size, samples].min   ## calc last index
    last  = history[idx-1]
    first = history[0]

    diff_days  = first.date.jd - last.date.jd
    diff_stars = first.stars   - last.stars

    ## note: use factor 1000 for fixed integer division
    ##  converts to float at the end

    ##  todo: check for better way (convert to float upfront - why? why not?)

    diff = (diff_stars * days * 1000) / diff_days
    ##  puts "diff=#{diff}:#{diff.class.name}"    ## check if it's a float
    (diff.to_f/1000.0)
  end
end

#commits ⇒ Object 



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# File 'lib/hubba/stats.rb', line 54

def commits() @data['commits']; end

#committed ⇒ Object

last commit date (from author NOT committer)



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# File 'lib/hubba/stats.rb', line 65

def committed   ## last commit date (from author NOT committer)
  @cache['committed'] ||= parse_date( last_commit_author_date )
end

#committed_at ⇒ Object

last commit date (from author NOT committer)



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# File 'lib/hubba/stats.rb', line 69

def committed_at()   ## last commit date (from author NOT committer)
  @cache['committed_at'] ||= parse_datetime( last_commit_author_date )
end

#created ⇒ Object

date (only) versions



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# File 'lib/hubba/stats.rb', line 27

def created() @cache['created'] ||= parse_date( @data['created_at'] ); end

#created_at ⇒ Object

note: return datetime objects (NOT strings); if not present/available return nil/null



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# File 'lib/hubba/stats.rb', line 22

def created_at() @cache['created_at'] ||= parse_datetime( @data['created_at'] ); end

#full_name ⇒ Object 



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# File 'lib/hubba/stats.rb', line 18

def full_name() @data['full_name']; end

#history ⇒ Object 



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# File 'lib/hubba/stats.rb', line 37

def history
  @cache['history'] ||= begin
                          if @data['history']
                            build_history( @data['history'] )
                          else
                            nil
                          end
                        end
end

#history_str ⇒ Object

todo/check: rename/change to format_history or fmt_history - why? why not?



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# File 'lib/hubba/stats.rb', line 198

def history_str  ## todo/check: rename/change to format_history or fmt_history - why? why not?
  ## returns "pretty printed" history as string buffer
  buf = ''
  buf << "[#{history.size}]: "

  history.each do |item|
    buf << "#{item.stars}"

    diff_stars = item.diff_stars
    diff_days  = item.diff_days
    if diff_stars && diff_days  ## note: last item has no diffs
      if diff_stars > 0 || diff_stars < 0
        if diff_stars > 0
          buf << " (+#{diff_stars}"
        else
          buf << " (#{diff_stars}"
        end
        buf << " in #{diff_days}d) "
      else  ## diff_stars == 0
        buf << " (#{diff_days}d) "
      end
    end
  end
  buf
end

#last_commit ⇒ Object

convenience shortcut; get first/last commit (use [0]) or nil



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# File 'lib/hubba/stats.rb', line 56

def last_commit   ## convenience shortcut; get first/last commit (use [0]) or nil
  if @data['commits'] && @data['commits'][0]
     @data['commits'][0]
  else
     nil
  end
end

#last_commit_author_date ⇒ Object 



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# File 'lib/hubba/stats.rb', line 73

def last_commit_author_date
  h = last_commit
  h ? h['author']['date'] : nil
end

#last_commit_message ⇒ Object

convenience shortcut; last commit message



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# File 'lib/hubba/stats.rb', line 79

def last_commit_message    ## convenience shortcut; last commit message
  h = last_commit

  committer_name = h['committer']['name']
  author_name    = h['author']['name']
  message        = h['message']

  buf = ""
  buf << message
  buf << " by #{author_name}"

  if committer_name != author_name
    buf << " w/ #{committer_name}"
  end
end

#parse_date(str) ⇒ Object 



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# File 'lib/hubba/stats.rb', line 100

def parse_date( str )     str ? Date.strptime( str, '%Y-%m-%d') : nil; end

#parse_datetime(str) ⇒ Object

helpers



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# File 'lib/hubba/stats.rb', line 99

def parse_datetime( str ) str ? DateTime.strptime( str, '%Y-%m-%dT%H:%M:%S') : nil; end

#pushed ⇒ Object 



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# File 'lib/hubba/stats.rb', line 29

def pushed()  @cache['pushed']  ||= parse_date( @data['pushed_at'] ); end

#pushed_at ⇒ Object 



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# File 'lib/hubba/stats.rb', line 24

def pushed_at()  @cache['pushed_at']  ||= parse_datetime( @data['pushed_at'] );  end

#read ⇒ Object 



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# File 'lib/hubba/stats.rb', line 297

def read
  ## note: skip reading if file not present
  basename = full_name.gsub( '/', '~' )   ## e.g. poole/hyde become poole~hyde
  data_dir = Hubba.config.data_dir
  path = "#{data_dir}/#{basename}.json"

  if File.exist?( path )
    puts "  reading stats from #{basename} (#{data_dir})..."
    json = File.open( path, 'r:utf-8' ) { |f| f.read }
    @data = JSON.parse( json )

    ## reset (invalidate) cached values from data hash
    ##   use after reading or fetching
    @cache = {}
  else
    puts "!! WARN: - skipping reading stats from #{basename} -- file not found"
  end
  self   ## return self for (easy chaining)
end

#size ⇒ Object 



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# File 'lib/hubba/stats.rb', line 31

def size
  # size of repo in kb (as reported by github api)
  @data['size'] || 0   ## return 0 if not found - why? why not? (return nil - why? why not??)
end

#stars ⇒ Object 



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# File 'lib/hubba/stats.rb', line 48

def stars
  ## return last stargazers_count entry (as number; 0 if not found)
  @cache['stars'] ||= history ? history[0].stars : 0
end

#update(repo, commits) ⇒ Object

fetch / read / write methods

Raises:

  • (ArgumentError) 


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# File 'lib/hubba/stats.rb', line 229

def update( repo, commits )   ## update stats / fetch data from github via api
  raise ArgumentError, "Hubba::Resource expected; got #{repo.class.name}"      unless repo.is_a?( Resource )
  raise ArgumentError, "Hubba::Resource expected; got #{commits.class.name}"   unless commits.is_a?( Resource )

  ## e.g. 2015-05-11T20:21:43Z
  ## puts Time.iso8601( repo.data['created_at'] )
  @data['created_at'] = repo.data['created_at']
  @data['updated_at'] = repo.data['updated_at']
  @data['pushed_at']  = repo.data['pushed_at']

  @data['size']       = repo.data['size']  # size in kb (kilobyte)

  rec = {}

  puts "stargazers_count"
  puts repo.data['stargazers_count']
  rec['stargazers_count'] = repo.data['stargazers_count']

  today = Date.today.strftime( '%Y-%m-%d' )   ## e.g. 2016-09-27
  puts "add record #{today} to history..."
  pp rec      # check if stargazers_count is a number (NOT a string)

  @data[ 'history' ] ||= {}
  @data[ 'history' ][ today ] = rec

  ##########################
  ## also check / keep track of (latest) commit
  puts "last commit/update:"
  ## pp commits
  commit = {
    'committer' => {
      'date' => commits.data[0]['commit']['committer']['date'],
      'name' => commits.data[0]['commit']['committer']['name']
    },
    'author' => {
      'date' => commits.data[0]['commit']['author']['date'],
      'name' => commits.data[0]['commit']['author']['name']
    },
    'message' => commits.data[0]['commit']['message']
  }

  ## for now store only the latest commit (e.g. a single commit in an array)
  @data[ 'commits' ] = [commit]

  pp @data

  ## reset (invalidate) cached values from data hash
  ##   use after reading or fetching
  @cache = {}

  self   ## return self for (easy chaining)
end

#updated ⇒ Object 



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# File 'lib/hubba/stats.rb', line 28

def updated() @cache['updated'] ||= parse_date( @data['updated_at'] ); end

#updated_at ⇒ Object 



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# File 'lib/hubba/stats.rb', line 23

def updated_at() @cache['updated_at'] ||= parse_datetime( @data['updated_at'] ); end

#write ⇒ Object 



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# File 'lib/hubba/stats.rb', line 284

def write
  basename = full_name.gsub( '/', '~' )   ## e.g. poole/hyde become poole~hyde
  data_dir = Hubba.config.data_dir
  puts "  writing stats to #{basename} (#{data_dir})..."

  ## todo/fix: add FileUtils.makepath_r or such!!!
  File.open( "#{data_dir}/#{basename}.json", 'w:utf-8' ) do |f|
      f.write JSON.pretty_generate( data )
  end
  self   ## return self for (easy chaining)
end