X-Git-Url: https://git.auder.net/rpsls.js?a=blobdiff_plain;f=parser.js;fp=parser.js;h=d6cee80cab3350e63d20bd40f8cb937e70944426;hb=b06f8fe6700d326e5bfae39e01a6ec58c1f46680;hp=6d028fd05e07e5f812a4a0238f13dbce54aa30ef;hpb=e570c0aab6f7b776cb8c6ce3c7d64c585deb66a0;p=erdiag.git diff --git a/parser.js b/parser.js index 6d028fd..d6cee80 100644 --- a/parser.js +++ b/parser.js @@ -1,7 +1,7 @@ // ER diagram description parser class ErDiags { - constructor(description) + constructor(description, output, image) { this.entities = { }; this.inheritances = [ ]; @@ -9,22 +9,21 @@ class ErDiags this.tables = { }; this.mcdParsing(description); this.mldParsing(); - // Cache SVG graphs returned by server (in addition to server cache = good perfs) - this.mcdGraph = ""; - this.mldGraph = ""; - this.sqlText = ""; + this.output = output || "compact"; + this.image = image || "svg"; } - static get CARDINAL() + static CARDINAL(symbol) { - return { - "*": "0,n", - "+": "1,n", - "?": "0,1", - "1": "1,1", - "?R": "(0,1)", - "1R": "(1,1)", - }; + let res = { "*": "0,n", "+": "1,n", "?": "0,1", "1": "1,1" } [ symbol[0] ]; + if (symbol.length >= 2) + { + if (symbol[1] == 'R') + res = '(' + res + ')'; + else if (['>','<'].includes(symbol[1])) + res += symbol[1]; + } + return res; } /////////////////////////////// @@ -99,13 +98,12 @@ class ErDiags field.isKey = true; line = line.slice(1); } - field.name = line.match(/[^()"\s]+/)[0]; - let parenthesis = line.match(/\((.+)\)/); - if (parenthesis !== null) + field.name = line.match(/[^"\s]+/)[0]; + let sqlClues = line.substring(field.name.length).trim(); + if (sqlClues.length > 0) { - let sqlClues = parenthesis[1]; field.type = sqlClues.match(/[^\s]+/)[0]; //type is always the first indication (mandatory) - field.qualifiers = sqlClues.substring(field.type.length).trim(); + field.qualifiers = sqlClues.substring(field.type.length); } attributes.push(field); } @@ -166,12 +164,17 @@ class ErDiags Object.keys(this.entities).forEach( name => { let newTable = [ ]; //array of fields this.entities[name].attributes.forEach( attr => { - newTable.push({ + let newField = { name: attr.name, type: attr.type, isKey: attr.isKey, - qualifiers: attr.qualifiers, - }); + }; + if (!!attr.qualifiers && !!attr.qualifiers.match(/references/i)) + { + Object.assign(newField, {ref: attr.qualifiers.match(/references ([^\s]+)/i)[1]}); + newField.qualifiers = attr.qualifiers.replace(/references [^\s]+/i, ""); + } + newTable.push(newField); }); this.tables[name] = newTable; }); @@ -184,8 +187,13 @@ class ErDiags name: inh.parent + "_id", type: this.tables[inh.parent][idx].type, isKey: true, +<<<<<<< HEAD qualifiers: (this.tables[inh.parent][idx].qualifiers || "") + " foreign key references " + inh.parent, ref: inh.parent, +======= + qualifiers: this.tables[inh.parent][idx].qualifiers || "", + ref: inh.parent + "(" + this.tables[inh.parent][idx].name + ")", +>>>>>>> 40b4a9d230d105a61e22bef0a63a6e8d515524e9 }); }); }); @@ -204,12 +212,14 @@ class ErDiags this.entities[e2.name].attributes.forEach( attr => { if (attr.isKey) { + // For "weak tables", foreign keys become part of the key + const isKey = e.card.length >= 2 && e.card[1] == 'R'; this.tables[e.name].push({ - isKey: e.card.length >= 2 && e.card[1] == 'R', //"weak tables" foreign keys become part of the key + isKey: isKey, name: e2.name + "_" + attr.name, type: attr.type, - qualifiers: "foreign key references " + e2.name + " " + (e.card[0]=='1' ? "not null" : ""), - ref: e2.name, //easier drawMld function (fewer regexps) + qualifiers: !isKey && e.card[0]=='1' ? "not null" : "", + ref: e2.name + "(" + attr.name + ")", }); } }); @@ -238,11 +248,27 @@ class ErDiags name: item.entity + "_" + f.name, isKey: true, type: f.type, - qualifiers: (f.qualifiers || "") + " foreign key references " + item.entity + " not null", - ref: item.entity, + qualifiers: f.qualifiers || "", + ref: item.entity + "(" + f.name + ")", }); }); }); + // Check for duplicates (in case of self-relationship), rename if needed + newTable.fields.forEach( (f,i) => { + const idx = newTable.fields.findIndex( item => { return item.name == f.name; }); + if (idx < i) + { + // Current field is a duplicate + let suffix = 2; + let newName = f.name + suffix; + while (newTable.fields.findIndex( item => { return item.name == newName; }) >= 0) + { + suffix++; + newName = f.name + suffix; + } + f.name = newName; + } + }); // Add relationship potential own attributes (a.attributes || [ ]).forEach( attr => { newTable.fields.push({ @@ -261,28 +287,12 @@ class ErDiags // DRAWING + GET SQL FROM PARSING ///////////////////////////////// - static AjaxGet(dotInput, callback) - { - let xhr = new XMLHttpRequest(); - xhr.onreadystatechange = function() { - if (this.readyState == 4 && this.status == 200) - callback(this.responseText); - }; - xhr.open("GET", "scripts/getGraphSvg.php?dot=" + encodeURIComponent(dotInput), true); - xhr.send(); - } - // "Modèle conceptuel des données". TODO: option for graph size // NOTE: randomizing helps to obtain better graphs (sometimes) drawMcd(id, mcdStyle) //mcdStyle: bubble, or compact { let element = document.getElementById(id); mcdStyle = mcdStyle || "compact"; - if (this.mcdGraph.length > 0) - { - element.innerHTML = this.mcdGraph; - return; - } // Build dot graph input let mcdDot = 'graph {\n'; mcdDot += 'rankdir="LR";\n'; @@ -392,27 +402,20 @@ class ErDiags mcdDot += '"' + e.name + '":name -- "' + name + '"'; else mcdDot += '"' + name + '" -- "' + e.name + '":name'; - mcdDot += '[label="' + ErDiags.CARDINAL[e.card] + '"];\n'; + mcdDot += '[label="' + ErDiags.CARDINAL(e.card) + '"];\n'; }); }); mcdDot += '}'; - //console.log(mcdDot); - ErDiags.AjaxGet(mcdDot, graphSvg => { - this.mcdGraph = graphSvg; - element.innerHTML = graphSvg; - }); + if (this.output == "graph") //draw graph in element + element.innerHTML = ""; + else //just show dot input + element.innerHTML = mcdDot.replace(//g,">"); } // "Modèle logique des données", from MCD without anomalies - // TODO: this one should draw links from foreign keys to keys (port=... in
' + name + ' |
' + label + ' |
" + sqlText + "
";
}