util.js (16206B)
1 2 function log_error(fmt, ...args) { 3 console.error(fmt, ...args) 4 } 5 6 function log_debug(fmt, ...args) { 7 console.debug(fmt, ...args) 8 } 9 10 /* find_node is a short name for document.querySelector, it also takes in a 11 * parent element to search on. 12 */ 13 function find_node(selector, parentEl) { 14 const el = parentEl ? parentEl : document; 15 return el.querySelector(selector) 16 } 17 18 /* find_nodes is a short name for document.querySelectorAll, it also takes in a 19 * parent element to search on. 20 */ 21 function find_nodes(selector, parentEl) { 22 const el = parentEl ? parentEl : document; 23 return el.querySelectorAll(selector) 24 } 25 26 /* uuidv4 returns a new uuid v4 27 */ 28 function uuidv4() { 29 return ([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g, c => 30 (c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> c / 4).toString(16) 31 ); 32 } 33 34 function bech32_decode(pubkey) { 35 const decoded = bech32.decode(pubkey) 36 const bytes = fromWords(decoded.words) 37 return nostrjs.hex_encode(bytes) 38 } 39 40 function get_since_time(created_at) { 41 if (created_at == null) 42 return null 43 return created_at - 60 * 10 44 } 45 46 function zero_bits(b) { 47 let n = 0; 48 if (b == 0) return 8; 49 while (b >>= 1) { 50 n++; 51 } 52 return 7-n; 53 } 54 55 function leading_zero_bits(id) { 56 const buf = nostrjs.hex_decode(id) 57 let i 58 for (i = 0, total = 0; i < 32; i++) { 59 bits = zero_bits(buf[i]) 60 total += bits 61 if (bits != 8) { 62 break 63 } 64 } 65 return total 66 } 67 68 /* min returns the minimum value of a or b 69 */ 70 function min(a, b) { 71 return a < b ? a : b; 72 } 73 74 function difficulty_to_prefix(d) { 75 const n = Math.floor(d / 4) 76 let s = "" 77 for (i = 0; i < n; i++) { 78 s += "0" 79 } 80 return s 81 } 82 83 function calculate_pow(ev) { 84 const id_bits = leading_zero_bits(ev.id) 85 for (const tag of ev.tags) { 86 if (tag.length >= 3 && tag[0] === "nonce") { 87 const target = +tag[2] 88 if (isNaN(target)) 89 return 0 90 91 // if our nonce target is smaller than the difficulty, 92 // then we use the nonce target as the actual difficulty 93 return min(target, id_bits) 94 } 95 } 96 97 // not a valid pow if we don't have a difficulty target 98 return 0 99 } 100 101 /* can_reply returns a boolean value based on if you can "reply" to the event 102 * in the manner of a chat. 103 */ 104 function can_reply(ev) { 105 return ev.kind === 1 || ev.kind === 42 106 } 107 108 function should_add_to_timeline(ev) { 109 // TODO rename should_add_to_timeline to is_timeline_event 110 return ev.kind === 1 || ev.kind === 42 || ev.kind === 6 111 } 112 113 /* time_delta returns a string of the time of current since previous. 114 */ 115 function time_delta(current, previous) { 116 var msPerMinute = 60 * 1000; 117 var msPerHour = msPerMinute * 60; 118 var msPerDay = msPerHour * 24; 119 var msPerMonth = msPerDay * 30; 120 var msPerYear = msPerDay * 365; 121 var elapsed = current - previous; 122 123 if (elapsed < msPerMinute) { 124 return Math.round(elapsed/1000) + ' seconds ago'; 125 } 126 else if (elapsed < msPerHour) { 127 return Math.round(elapsed/msPerMinute) + ' minutes ago'; 128 } 129 else if (elapsed < msPerDay ) { 130 return Math.round(elapsed/msPerHour ) + ' hours ago'; 131 } 132 else if (elapsed < msPerMonth) { 133 return Math.round(elapsed/msPerDay) + ' days ago'; 134 } 135 else if (elapsed < msPerYear) { 136 return Math.round(elapsed/msPerMonth) + ' months ago'; 137 } 138 else { 139 return Math.round(elapsed/msPerYear ) + ' years ago'; 140 } 141 } 142 143 function is_valid_reaction_content(content) { 144 return content === "+" || content === "" || is_emoji(content) 145 } 146 147 function get_reaction_emoji(ev) { 148 if (ev.content === "+" || ev.content === "") { 149 return "❤️"; 150 } 151 return ev.content 152 } 153 154 const IMG_REGEX = /(png|jpeg|jpg|gif|webp)$/i 155 function is_img_url(path) { 156 return IMG_REGEX.test(path) 157 } 158 159 const VID_REGEX = /(webm|mp4)$/i 160 function is_video_url(path) { 161 return VID_REGEX.test(path) 162 } 163 164 const URL_REGEX = /(^|\s)(https?:\/\/[^\s]+)[,:)]?(\w|$)/g; 165 function linkify(text, show_media) { 166 return text.replace(URL_REGEX, function(match, p1, p2, p3) { 167 const url = p2+p3 168 const parsed = new URL(url) 169 let markup; 170 if (show_media && is_img_url(parsed.pathname)) { 171 markup = html` 172 <a target="_blank" href="${url}"> 173 <img class="inline-img" src="${url}"/> 174 </a> 175 `; 176 } else if (show_media && is_video_url(parsed.pathname)) { 177 markup = html` 178 <video controls class="inline-img" /> 179 <source src="${url}"> 180 </video> 181 `; 182 } else { 183 markup = html`<a target="_blank" rel="noopener noreferrer" href="${url}">${url}</a>`; 184 } 185 return p1+markup; 186 }) 187 } 188 189 const WORD_REGEX=/\w/ 190 function is_emoji(str) { 191 return !WORD_REGEX.test(str) && REACTION_REGEX.test(str) 192 } 193 194 const REACTION_REGEX = 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83E\uDDD1\uD83C[\uDFFB-\uDFFF])))?|\uDFFC(?:\u200D(?:[\u2695\u2696\u2708]\uFE0F?|\u2764\uFE0F?\u200D(?:\uD83D\uDC8B\u200D)?\uD83E\uDDD1\uD83C[\uDFFB\uDFFD-\uDFFF]|\uD83C[\uDF3E\uDF73\uDF7C\uDF84\uDF93\uDFA4\uDFA8\uDFEB\uDFED]|\uD83D[\uDCBB\uDCBC\uDD27\uDD2C\uDE80\uDE92]|\uD83E(?:[\uDDAF-\uDDB3\uDDBC\uDDBD]|\uDD1D\u200D\uD83E\uDDD1\uD83C[\uDFFB-\uDFFF])))?|\uDFFD(?:\u200D(?:[\u2695\u2696\u2708]\uFE0F?|\u2764\uFE0F?\u200D(?:\uD83D\uDC8B\u200D)?\uD83E\uDDD1\uD83C[\uDFFB\uDFFC\uDFFE\uDFFF]|\uD83C[\uDF3E\uDF73\uDF7C\uDF84\uDF93\uDFA4\uDFA8\uDFEB\uDFED]|\uD83D[\uDCBB\uDCBC\uDD27\uDD2C\uDE80\uDE92]|\uD83E(?:[\uDDAF-\uDDB3\uDDBC\uDDBD]|\uDD1D\u200D\uD83E\uDDD1\uD83C[\uDFFB-\uDFFF])))?|\uDFFE(?:\u200D(?:[\u2695\u2696\u2708]\uFE0F?|\u2764\uFE0F?\u200D(?:\uD83D\uDC8B\u200D)?\uD83E\uDDD1\uD83C[\uDFFB-\uDFFD\uDFFF]|\uD83C[\uDF3E\uDF73\uDF7C\uDF84\uDF93\uDFA4\uDFA8\uDFEB\uDFED]|\uD83D[\uDCBB\uDCBC\uDD27\uDD2C\uDE80\uDE92]|\uD83E(?:[\uDDAF-\uDDB3\uDDBC\uDDBD]|\uDD1D\u200D\uD83E\uDDD1\uD83C[\uDFFB-\uDFFF])))?|\uDFFF(?:\u200D(?:[\u2695\u2696\u2708]\uFE0F?|\u2764\uFE0F?\u200D(?:\uD83D\uDC8B\u200D)?\uD83E\uDDD1\uD83C[\uDFFB-\uDFFE]|\uD83C[\uDF3E\uDF73\uDF7C\uDF84\uDF93\uDFA4\uDFA8\uDFEB\uDFED]|\uD83D[\uDCBB\uDCBC\uDD27\uDD2C\uDE80\uDE92]|\uD83E(?:[\uDDAF-\uDDB3\uDDBC\uDDBD]|\uDD1D\u200D\uD83E\uDDD1\uD83C[\uDFFB-\uDFFF])))?))?|\uDEF1(?:\uD83C(?:\uDFFB(?:\u200D\uD83E\uDEF2\uD83C[\uDFFC-\uDFFF])?|\uDFFC(?:\u200D\uD83E\uDEF2\uD83C[\uDFFB\uDFFD-\uDFFF])?|\uDFFD(?:\u200D\uD83E\uDEF2\uD83C[\uDFFB\uDFFC\uDFFE\uDFFF])?|\uDFFE(?:\u200D\uD83E\uDEF2\uD83C[\uDFFB-\uDFFD\uDFFF])?|\uDFFF(?:\u200D\uD83E\uDEF2\uD83C[\uDFFB-\uDFFE])?))?)$/ 195