annotate libervia/backend/tools/common/utils.py @ 4094:c3b68fdc2de7

component AP gateway: fix handling of XMPP comments authors: the gateway was supposing that comments where emitted from PEP of author. While this is the case for most blog posts, it's not for comments. Instead the component is now using `author_jid` which is retrieved by XEP-0277 plugin, and reject the item if the auhor is not verified (i.e. if `publisher` attribute is not set by XMPP service).
author Goffi <goffi@goffi.org>
date Mon, 12 Jun 2023 14:50:43 +0200
parents 4b842c1fb686
children e11b13418ba6
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rev   line source
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1 #!/usr/bin/env python3
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2
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7550ae9cfbac Renamed the project from "Salut à Toi" to "Libervia":
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3 # Libervia: an XMPP client
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be6d91572633 date update
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4 # Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
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5
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6 # This program is free software: you can redistribute it and/or modify
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7 # it under the terms of the GNU Affero General Public License as published by
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8 # the Free Software Foundation, either version 3 of the License, or
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9 # (at your option) any later version.
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10
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11 # This program is distributed in the hope that it will be useful,
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12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 # GNU Affero General Public License for more details.
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15
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16 # You should have received a copy of the GNU Affero General Public License
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17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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18
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19 """Misc utils for both backend and frontends"""
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20
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21 import collections.abc
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22 size_units = {
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23 "b": 1,
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24 "kb": 1000,
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25 "mb": 1000**2,
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26 "gb": 1000**3,
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27 "tb": 1000**4,
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28 "pb": 1000**5,
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29 "eb": 1000**6,
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30 "zb": 1000**7,
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31 "yb": 1000**8,
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32 "o": 1,
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33 "ko": 1000,
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34 "mo": 1000**2,
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35 "go": 1000**3,
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36 "to": 1000**4,
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37 "po": 1000**5,
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38 "eo": 1000**6,
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39 "zo": 1000**7,
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40 "yo": 1000**8,
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41 "kib": 1024,
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42 "mib": 1024**2,
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43 "gib": 1024**3,
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44 "tib": 1024**4,
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45 "pib": 1024**5,
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46 "eib": 1024**6,
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47 "zib": 1024**7,
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48 "yib": 1024**8,
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49 "kio": 1024,
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50 "mio": 1024**2,
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51 "gio": 1024**3,
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52 "tio": 1024**4,
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53 "pio": 1024**5,
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54 "eio": 1024**6,
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55 "zio": 1024**7,
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56 "yio": 1024**8,
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57 }
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58
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59
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60 def per_luminance(red, green, blue):
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61 """Caculate the perceived luminance of a RGB color
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62
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63 @param red(int): 0-1 normalized value of red
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64 @param green(int): 0-1 normalized value of green
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65 @param blue(int): 0-1 normalized value of blue
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66 @return (float): 0-1 value of luminance (<0.5 is dark, else it's light)
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67 """
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68 # cf. https://stackoverflow.com/a/1855903, thanks Gacek
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69
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70 return 0.299 * red + 0.587 * green + 0.114 * blue
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71
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72
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73 def recursive_update(ori: dict, update: dict):
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74 """Recursively update a dictionary"""
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75 # cf. https://stackoverflow.com/a/3233356, thanks Alex Martelli
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76 for k, v in update.items():
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77 if isinstance(v, collections.abc.Mapping):
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78 ori[k] = recursive_update(ori.get(k, {}), v)
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79 else:
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80 ori[k] = v
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81 return ori
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82
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83 class OrderedSet(collections.abc.MutableSet):
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84 """A mutable sequence which doesn't keep duplicates"""
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85 # TODO: complete missing set methods
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86
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87 def __init__(self, values=None):
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88 self._dict = {}
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89 if values is not None:
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90 self.update(values)
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91
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92 def __len__(self):
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93 return len(self._dict)
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94
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95 def __iter__(self):
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96 return iter(self._dict.keys())
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97
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98 def __contains__(self, item):
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99 return item in self._dict
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100
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101 def add(self, item):
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102 self._dict[item] = None
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103
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104 def discard(self, item):
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105 try:
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106 del self._dict[item]
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107 except KeyError:
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108 pass
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109
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110 def update(self, items):
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111 self._dict.update({i: None for i in items})
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112
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113
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114 def parse_size(size):
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115 """Parse a file size with optional multiple symbole"""
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116 try:
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117 return int(size)
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118 except ValueError:
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119 number = []
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120 symbol = []
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121 try:
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122 for c in size:
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123 if c == " ":
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124 continue
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125 if c.isdigit():
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126 number.append(c)
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127 elif c.isalpha():
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128 symbol.append(c)
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129 else:
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130 raise ValueError("unexpected char in size: {c!r} (size: {size!r})")
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131 number = int("".join(number))
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132 symbol = "".join(symbol)
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133 if symbol:
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134 try:
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135 multiplier = size_units[symbol.lower()]
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136 except KeyError:
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137 raise ValueError(
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138 "unknown size multiplier symbole: {symbol!r} (size: {size!r})")
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139 else:
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140 return number * multiplier
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141 return number
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142 except Exception as e:
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143 raise ValueError(f"invalid size: {e}")
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144
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145
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146 def get_size_multiplier(size, suffix="o"):
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147 """Get multiplier of a file size"""
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148 size = int(size)
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149 #  cf. https://stackoverflow.com/a/1094933 (thanks)
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150 for unit in ["", "Ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi"]:
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151 if abs(size) < 1024.0:
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152 return size, f"{unit}{suffix}"
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153 size /= 1024.0
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154 return size, f"Yi{suffix}"
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155
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156
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157 def get_human_size(size, suffix="o", sep=" "):
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158 size, symbol = get_size_multiplier(size, suffix)
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159 return f"{size:.2f}{sep}{symbol}"